A method and system for quality detection of in-vehicle display screens based on image color gamut analysis

Abstract

The present invention discloses a method and system for detecting the quality of in-vehicle display screens based on image color gamut analysis, which relates to the technical field of display screen detection. The method includes obtaining in-vehicle display screen information, based on the in-vehicle display screen information, obtaining the standard color gamut information of the display screen, and based on the standard color gamut information of the display screen, through quality detection and analysis of the display screen, obtaining the regional range threshold. By dividing the in-vehicle display screen, the present invention ensures the accuracy and reliability of the quality detection of the in-vehicle display screen. Through the color gamut coverage index of the display screen, the color gamut coverage condition of the display screen is accurately evaluated, ensuring the stability of production quality. Through the color test data of the display screen, it is judged whether the image display of the display screen meets the production standard, ensuring that the in-vehicle display screen provides a consistent and true color experience under different lighting and angles. It can effectively identify the color deviation of the display screen, ensure that the visual effect reaches the design standard, and improve driving safety and user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of display screen detection, and specifically relates to a method and system for detecting the quality of in-vehicle display screens based on image color gamut analysis. Background Technique

[0002] With the continuous improvement of the intelligent and information level of automobiles, as an important interface for vehicle information interaction, the performance and quality of in-vehicle liquid crystal display screens have a crucial impact on driving safety and user experience. However, during the production and use of in-vehicle liquid crystal display screens, due to various reasons (such as manufacturing processes, material aging, external impacts, etc.), the display screens may have various defects, such as bright spots, dark spots, color patches, lines, etc. These defects not only affect the visual effect of the display screen, but may also lead to incomplete information display, misreading or complete failure, thus endangering driving safety.

[0003] At present, there are still problems in the quality detection of in-vehicle display screens, such as being unable to divide in-vehicle display screens more meticulously, unable to accurately analyze the color gamut status of the display screens, unable to accurately evaluate the color gamut coverage of in-vehicle display screens, unable to set a suitable color test environment for in-vehicle display screens according to the color gamut coverage of in-vehicle display screens, and unable to accurately evaluate the quality of in-vehicle display screens. Summary of the Invention

[0004] To solve the above technical problems, a method and system for detecting the quality of in-vehicle display screens based on image color gamut analysis are provided. The technical solution of the present invention solves the problems raised in the above background technique, such as being unable to divide in-vehicle display screens more meticulously, unable to accurately analyze the color gamut status of the display screens, unable to accurately evaluate the color gamut coverage of in-vehicle display screens, unable to set a suitable color test environment for in-vehicle display screens according to the color gamut coverage of in-vehicle display screens, and unable to accurately evaluate the quality of in-vehicle display screens.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A method for detecting the quality of in-vehicle display screens based on image color gamut analysis, including:

[0007] Obtain in-vehicle display screen information, where the in-vehicle display screen information includes in-vehicle display screen parameter information and in-vehicle display screen image display specification information;

[0008] Based on the in-vehicle display screen information, obtain the standard color gamut information of the display screen;

[0009] According to the standard color gamut information of the display screen, based on the quality detection and analysis of the display screen, obtain the regional range threshold;

[0010] Divide the in-vehicle display screen based on the regional range threshold to obtain the display screen detection area;

[0011] Set the display screen to the standard display mode and turn off the automatic brightness or color temperature adjustment function;

[0012] Detect the in-vehicle display screen based on the color test image to obtain the display screen color gamut test data;

[0013] Based on the display screen detection area and the display screen color gamut test data, determine whether the display screen image color gamut meets the production standard. If not, adjust the in-vehicle display screen production process according to the display screen color gamut test data. If so, obtain the display screen characteristic color gamut information according to the display screen color gamut test data;

[0014] Detect the in-vehicle display screen according to the display screen characteristic color gamut information to obtain the display screen color test data;

[0015] Based on the display screen color test data, determine whether the display screen image display meets the production standard. If not, adjust the in-vehicle display screen production process according to the display screen color test data. If so, the in-vehicle display screen is qualified.

[0016] Preferably, the step of dividing the in-vehicle display screen based on the regional range threshold to obtain the display screen detection area specifically includes:

[0017] Obtain the standard color gamut reference coordinate information according to the display screen standard color gamut information, where the standard color gamut reference coordinate information represents the coordinates of the display screen standard color gamut reference color in the color space coordinate system;

[0018] Obtain the in-vehicle display screen specification information according to the in-vehicle display screen information, where the in-vehicle display screen specification information includes the in-vehicle display screen length information and the in-vehicle display screen width information;

[0019] Obtain the regional range threshold according to the standard color gamut reference coordinate information and the in-vehicle display screen specification information;

[0020] Divide the in-vehicle display screen based on the regional range threshold to obtain the display screen detection area.

[0021] Preferably, the step of determining whether the display screen image color gamut meets the production standard according to the display screen detection area and the display screen color gamut test data specifically includes:

[0022] Obtain the regional image test data according to the display screen image test data;

[0023] Obtain the image color display data corresponding to each display screen detection area according to the regional image test data;

[0024] Based on the color space coordinate system, convert the image color display data to obtain the actual display gamut information. The actual display gamut represents the gamut contour formed with the position of the image color display data in the color space coordinate system as the boundary.

[0025] Obtain the standard gamut contour information according to the display screen standard gamut information.

[0026] Obtain the regional gamut coverage information according to the actual display gamut information and the standard gamut contour information.

[0027] Take the geometric center of each display screen detection area as the position of the display screen detection area, and obtain the distribution information of the display screen detection area.

[0028] Obtain the regional position influence coefficient based on the distribution information of the display screen detection area.

[0029] Obtain the standard coverage information of the display gamut according to the in-vehicle display screen information.

[0030] Obtain the display screen gamut coverage index according to the regional gamut coverage information, the regional position influence coefficient, and the standard coverage information of the display gamut.

[0031] Judge whether the image gamut of the display screen meets the production standard according to the display screen gamut coverage index.

[0032] Preferably, the detection of the in-vehicle display screen according to the characteristic gamut information of the display screen to obtain the display screen color test data specifically includes:

[0033] Obtain the actual display gamut information.

[0034] Obtain the first gamut of the display screen and the second gamut of the display screen according to the display screen standard gamut information and the actual display gamut information.

[0035] Among them, the overlapping part of the display screen standard gamut and the actual display gamut is used as the first gamut of the display screen, and the part of the actual display gamut that does not overlap with the display screen standard gamut is used as the second gamut of the display screen.

[0036] Based on the first gamut of the display screen and the second gamut of the display screen, obtain the first display test color information and the second display test color information.

[0037] Based on the first display test color information, set the display screen to turn on the automatic brightness or color temperature adjustment function, and detect the in-vehicle display screen to obtain the first display test data.

[0038] Based on the second display test color information, set the display screen to turn off the automatic brightness or color temperature adjustment function, and detect the in-vehicle display screen to obtain the second display test data.

[0039] Obtain the display screen color test data according to the first display test data and the second display test data.

[0040] Preferably, the obtaining of the display screen color test data according to the first display test data and the second display test data specifically includes:

[0041] Obtain the first color set of the display screen according to the first color gamut of the display screen, and the first color set of the display screen includes the colors in the first color gamut of the display screen;

[0042] Based on the first color difference formula, use the two colors with the largest color difference values in the first color set of the display screen as the first display test colors;

[0043] Obtain the information on the normal working environment of the in-vehicle display screen, and the information on the normal working environment of the in-vehicle display screen includes the environmental brightness information under different weather and time conditions;

[0044] Use the highest brightness value in the information on the normal working environment of the in-vehicle display screen as the maximum value of the test environment brightness;

[0045] Based on the logical analysis of the automatic brightness adjustment of the in-vehicle display screen, obtain the minimum value of the test environment brightness;

[0046] Obtain the test environment information according to the maximum value of the test environment brightness and the minimum value of the test environment brightness;

[0047] Detect the in-vehicle display screen according to the test environment information and the first display test color information to obtain the first display test data;

[0048] Obtain the second color set of the display screen according to the second color gamut of the display screen, and the second color set of the display screen includes the colors in the second color gamut of the display screen;

[0049] Based on the second color difference formula, use the two colors with the largest color difference values in the second color set of the display screen as the second display test colors;

[0050] Based on the second display test color information, set the display screen to turn off the automatic brightness or color temperature adjustment function, and detect the in-vehicle display screen to obtain the second display test data;

[0051] Obtain the display screen color test data according to the first display test data and the second display test data.

[0052] Preferably, the judging whether the image display of the display screen meets the production standard according to the display screen color test data specifically includes:

[0053] Obtain the display screen brightness adjustment index according to the first display test data;

[0054] Based on the production standard of in-vehicle displays, obtain the threshold value of the display brightness adjustment index;

[0055] According to the display brightness adjustment index and the threshold value of the display brightness adjustment index, determine whether the automatic brightness adjustment of the display meets the production standard;

[0056] If the display brightness adjustment index does not exceed the threshold value of the display brightness adjustment index, the automatic brightness adjustment of the display does not meet the production standard, and adjust the automatic brightness adjustment function of the display according to the display brightness adjustment index;

[0057] If the display brightness adjustment index exceeds the threshold value of the display brightness adjustment index, the automatic brightness adjustment of the display meets the production standard;

[0058] According to the second display test data, obtain the second display color brightness information;

[0059] Based on the second display color brightness information and the color brightness threshold, obtain the color abnormal area of the display;

[0060] According to the second display color brightness information and the color abnormal area of the display, obtain the image display abnormal index;

[0061] According to the image display abnormal index, determine whether the image display of the display meets the production standard. If not, adjust the production process of the in-vehicle display according to the image display abnormal index. If so, the quality of the in-vehicle display is qualified.

[0062] Furthermore, a quality detection system for in-vehicle displays based on image color gamut analysis is proposed to implement the quality detection method as described above, including:

[0063] A main control module, which is used to obtain the display color gamut coverage index according to the regional color gamut coverage information, the regional position influence coefficient, and the display color gamut standard coverage information, judge whether the display image color gamut meets the production standard according to the display color gamut coverage index, obtain the display brightness adjustment index according to the first display test data, judge whether the display automatically adjusts the brightness meets the production standard according to the display brightness adjustment index and the display brightness adjustment index threshold, obtain the image display abnormality index according to the second display color and brightness information and the display color abnormality area, judge whether the display image display meets the production standard according to the image display abnormality index, obtain the regional range threshold according to the standard color gamut reference coordinate information and the vehicle-mounted display specification information, divide the vehicle-mounted display based on the regional range threshold, obtain the display detection area, take the center of the display detection area as the position of the display detection area, obtain the display detection area distribution information, obtain the regional position influence coefficient based on the display detection area distribution information, and adjust the vehicle-mounted display production process according to the display color gamut test data, the display brightness adjustment index, and the image display abnormality index;

[0064] An information acquisition module, which is used to acquire vehicle-mounted display information, vehicle-mounted display parameter information, and vehicle-mounted display image display specification information, obtain the display standard color gamut information based on the vehicle-mounted display information, obtain the standard color gamut reference coordinate information according to the display standard color gamut information, and obtain the vehicle-mounted display specification information, the vehicle-mounted display length information, and the vehicle-mounted display width information according to the vehicle-mounted display information;

[0065] A detection module, which is used to detect the vehicle-mounted display based on the color test image to obtain the display color gamut test data, set the display to turn on the automatic brightness or color temperature adjustment function based on the first display test color information, detect the vehicle-mounted display to obtain the first display test data, set the display to turn off the automatic brightness or color temperature adjustment function based on the second display test color information, detect the vehicle-mounted display to obtain the second display test data, and obtain the display color test data according to the first display test data and the second display test data;

[0066] A display module, which interacts with the main control module and is used to display the display detection area, the display color gamut test data, the display color test data, the display brightness adjustment index, and the image display abnormality index.

[0067] Optionally, the main control module specifically includes:

[0068] A control unit, which is used to obtain a regional range threshold according to standard color gamut reference coordinate information and vehicle-mounted display screen specification information, divide the vehicle-mounted display screen based on the regional range threshold to obtain a display screen detection area, use the center of the display screen detection area as the position of the display screen detection area, obtain display screen detection area distribution information, obtain a regional position influence coefficient based on the display screen detection area distribution information, and adjust the production process of the vehicle-mounted display screen according to the display screen color gamut test data, the display screen brightness adjustment index, and the image display abnormality index;

[0069] An information receiving unit, which interacts with the information acquisition module and the detection module, and is used to receive data and transmit it to the evaluation unit;

[0070] An evaluation unit, which is used to obtain a display screen color gamut coverage index according to the regional color gamut coverage information, the regional position influence coefficient, and the display color gamut standard coverage information, judge whether the display screen image color gamut meets the production standard according to the display screen color gamut coverage index, obtain a display screen brightness adjustment index according to the first display test data, judge whether the automatic brightness adjustment of the display screen meets the production standard according to the display screen brightness adjustment index and the display screen brightness adjustment index threshold, obtain an image display abnormality index according to the second display color brightness information and the display screen color abnormal area, and judge whether the display screen image display meets the production standard according to the image display abnormality index.

[0071] Optionally, the information acquisition module specifically includes:

[0072] A first acquisition unit, which is used to acquire vehicle-mounted display screen information, vehicle-mounted display screen parameter information, and vehicle-mounted display screen image display specification information, and obtain display screen standard color gamut information based on the vehicle-mounted display screen information;

[0073] A second acquisition unit, which is used to obtain standard color gamut reference coordinate information according to the display screen standard color gamut information, and obtain vehicle-mounted display screen specification information, vehicle-mounted display screen length information, and vehicle-mounted display screen width information according to the vehicle-mounted display screen information.

[0074] Optionally, the detection module specifically includes:

[0075] A first detection unit, which is used to detect the vehicle-mounted display screen based on a color test image to obtain display screen color gamut test data;

[0076] A second detection unit, which is configured to set the display screen to turn on the automatic brightness or color temperature adjustment function based on the first display test color information, detect the in-vehicle display screen, obtain first display test data, set the display screen to turn off the automatic brightness or color temperature adjustment function based on the second display test color information, detect the in-vehicle display screen, obtain second display test data, and obtain display screen color test data according to the first display test data and the second display test data.

[0077] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0078] The present invention provides a method and system for detecting the quality of an in-vehicle display screen based on image color gamut analysis. By dividing the in-vehicle display screen, the accuracy and reliability of the quality detection of the in-vehicle display screen are ensured. Through the display screen color gamut coverage index, the color gamut coverage status of the display screen is accurately evaluated, ensuring the stability of production quality. Through the display screen color test data, it is judged whether the image display of the display screen meets the production standards, ensuring that the in-vehicle display screen provides a consistent and real color experience under different lighting conditions and angles, effectively identifying the color deviation of the display screen, ensuring that the visual effect meets the design standards, and improving driving safety and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] Figure 1 It is a flowchart of a method for detecting the quality of an in-vehicle display screen based on image color gamut analysis proposed by the present invention;

[0080] Figure 2 It is a flowchart for obtaining the detection area of the display screen in the present invention;

[0081] Figure 3 It is a flowchart for obtaining the display screen color gamut coverage index in the present invention;

[0082] Figure 4 It is a flowchart for obtaining the display screen color test data in the present invention;

[0083] Figure 5 It is a block diagram of the structure of a system for detecting the quality of an in-vehicle display screen based on image color gamut analysis proposed by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0084] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations.

[0085] Referring to Figure 1 - Figure 4 As shown, a method for detecting the quality of an in-vehicle display screen based on image color gamut analysis in an embodiment of the present invention includes:

[0086] Obtain in-vehicle display screen information, where the in-vehicle display screen information includes in-vehicle display screen parameter information and in-vehicle display screen image display specification information;

[0087] Based on the in-vehicle display screen information, obtain the standard color gamut information of the display screen;

[0088] According to the standard color gamut information of the display screen, based on the display screen quality detection and analysis, obtain the regional range threshold;

[0089] Specifically, based on the regional range threshold, divide the in-vehicle display screen to obtain the display screen detection area, which specifically includes:

[0090] According to the standard color gamut information of the display screen, obtain the standard color gamut reference coordinate information, where the standard color gamut reference coordinate information represents the coordinates of the standard color gamut reference color of the display screen in the color space coordinate system;

[0091] According to the in-vehicle display screen information, obtain the in-vehicle display screen specification information, where the in-vehicle display screen specification information includes the in-vehicle display screen length information and the in-vehicle display screen width information;

[0092] According to the standard color gamut reference coordinate information and the in-vehicle display screen specification information, obtain the regional range threshold;

[0093] Based on the regional range threshold, divide the in-vehicle display screen to obtain the display screen detection area;

[0094] Among them, the regional range threshold is specifically:

[0095]

[0096] In the formula, is the regional length threshold of the regional range threshold, is the regional width threshold of the regional range threshold, is the length of the in-vehicle display screen, is the width of the in-vehicle display screen, is the coverage ratio coefficient of the in-vehicle display screen standard color gamut in the color space coordinate system, is the standard gamma value of the in-vehicle display screen color gamut, is the red coordinate value of the display screen color gamut reference, is the green coordinate value of the display screen color gamut reference, is the blue coordinate value of the display screen color gamut reference, is the standard color gamut span coefficient of the in-vehicle display screen.

[0097] In this solution, the standard color gamut information of the in-vehicle display screen is obtained through the information of the in-vehicle display screen. According to the standard color gamut reference coordinate information and the in-vehicle display screen specification information, the regional range threshold is obtained. Through the regional range threshold, the in-vehicle display screen is divided to obtain the display screen detection area, ensuring the accuracy and reliability of the quality detection of the in-vehicle display screen.

[0098] It can be understood that different in-vehicle display screens refer to different standard color gamuts, so the division of the display screen is also very different. Standard color gamuts include sRGB (for ordinary display devices), Adobe RGB (for high-quality image devices), and DCI-P3 (digital cinema standard color gamut), etc. The standard color gamut is displayed in the color space coordinate system to obtain the coordinates of the three primary colors of red, green, and blue. In this embodiment, the color space coordinate system is the CIE1931 chromaticity diagram, which represents colors through x and y coordinates. The CIE 1931 chromaticity diagram can represent the hue (color phase) and saturation (chromaticity) of colors and display all colors in the visible spectrum. Among them, the coordinate values of sRGB are (0.640, 0.330) (red), (0.300, 0.600) (green), (0.150, 0.060) (blue), the red, green, and blue coordinates of Adobe RGB are (0.640, 0.330), (0.210, 0.710), (0.150, 0.060) respectively, and the red, green, and blue coordinates of the DCI-P3 color gamut are (0.680, 0.320) (red), (0.265, 0.690) (green), (0.150, 0.060) (blue);

[0099] It should be noted that the coverage ratio coefficient of the in-vehicle display screen standard color gamut in the color space coordinate system represents the coverage area ratio of the standard color gamut in the CIE1931 coordinate system. The coverage ratio coefficient of sRGB is 0.225, the coverage ratio coefficient of Adobe RGB is 0.55, and the coverage ratio coefficient of DCI-P3 is 0.455.

[0100] Based on the regional range threshold, the in-vehicle display screen is divided to obtain the display screen detection area;

[0101] Set the display screen to the standard display mode and turn off the automatic brightness or color temperature adjustment function;

[0102] Based on the color test image, the in-vehicle display screen is detected to obtain the display screen color gamut test data;

[0103] According to the display screen detection area and the display screen color gamut test data, it is judged whether the display screen image color gamut meets the production standard. If not, the in-vehicle display screen production process is adjusted according to the display screen color gamut test data. If so, the display screen characteristic color gamut information is obtained according to the display screen color gamut test data;

[0104] Specifically, according to the detection area of the display screen and the test data of the display screen color gamut, it is determined whether the image color gamut of the display screen meets the production standard, specifically including:

[0105] According to the test data of the display screen image, obtain the test data of the regional image;

[0106] According to the test data of the regional image, obtain the image color display data corresponding to each detection area of the display screen;

[0107] Based on the color space coordinate system, convert the image color display data to obtain the actual display color gamut information. The actual display color gamut represents the color gamut contour formed with the position of the image color display data in the color space coordinate system as the boundary;

[0108] According to the standard color gamut information of the display screen, obtain the standard color gamut contour information;

[0109] According to the actual display color gamut information and the standard color gamut contour information, obtain the regional color gamut coverage information;

[0110] Take the geometric center of each detection area of the display screen as the position of the detection area of the display screen, and obtain the distribution information of the detection area of the display screen;

[0111] Based on the distribution information of the detection area of the display screen, obtain the regional position influence coefficient;

[0112] According to the information of the in-vehicle display screen, obtain the standard coverage information of the display color gamut;

[0113] According to the regional color gamut coverage information, the regional position influence coefficient, and the standard coverage information of the display color gamut, obtain the display screen color gamut coverage index;

[0114] According to the display screen color gamut coverage index, determine whether the image color gamut of the display screen meets the production standard;

[0115] Among them, if the display screen color gamut coverage index , then the image color gamut of the display screen does not meet the production standard, and adjust the production process of the in-vehicle display screen according to the test data of the display screen color gamut. If the display screen color gamut coverage index , then the image color gamut of the display screen meets the production standard;

[0116] The calculation formula of the display screen color gamut coverage index is:

[0117]

[0118] In the formula, Q is the display screen color gamut coverage index, is the regional color gamut coverage ratio of the i-th detection area of the display screen, is the overlapping area between the actual display color gamut and the standard color gamut of the i-th display detection area, is the total area of the display standard color gamut, is the regional position influence coefficient, is the regional position index, is the distance between the i-th display detection area and the center of the display, is the length of the vehicle-mounted display, is the regional length threshold of the regional range threshold, where, if , then , if , then , n is the total number of display detection areas, is the regional color gamut coverage ratio position correction coefficient.

[0119] In this solution, by comparing the actual display color gamut and the standard color gamut profile, the regional color gamut coverage information is obtained. Taking the center of the display detection area as the position of the display detection area, the distribution information of the display detection area is obtained. Based on the distribution information of the display detection area, the regional position influence coefficient is obtained. According to the vehicle-mounted display information, the standard coverage information of the display color gamut is obtained. According to the regional color gamut coverage information, the regional position influence coefficient and the standard coverage information of the display color gamut, the display color gamut coverage index is obtained. Through the display color gamut coverage index, the color gamut coverage status of the display is accurately evaluated, ensuring the stability of production quality.

[0120] It can be understood that in the actual use process of the vehicle-mounted display, the color gamut requirements for different positions of the display are also very different. Obviously, for the image display in the edge area of the display, the requirement for color restoration is lower than that in the center position of the display. Therefore, without detecting the display quality with a fixed color gamut coverage ratio under the condition of meeting the use requirements, the production efficiency of the display is ensured. In this embodiment, the regional color gamut coverage ratio position correction coefficient .

[0121] Detect the vehicle-mounted display according to the display characteristic color gamut information, and obtain the display color test data;

[0122] Specifically, detecting the vehicle-mounted display according to the display characteristic color gamut information and obtaining the display color test data specifically includes:

[0123] Obtain the actual display color gamut information;

[0124] According to the display standard color gamut information and the actual display color gamut information, obtain the first color gamut of the display and the second color gamut of the display;

[0125] Among them, the overlapping part of the standard color gamut and the actual display color gamut of the display screen is used as the first color gamut of the display screen, and the part of the actual display color gamut that does not overlap with the standard color gamut of the display screen is used as the second color gamut of the display screen;

[0126] Based on the first color gamut and the second color gamut of the display screen, first display test color information and second display test color information are obtained;

[0127] Based on the first display test color information, the display screen is set to turn on the function of automatically adjusting the brightness or color temperature, and the in-vehicle display screen is detected to obtain first display test data;

[0128] Based on the second display test color information, the display screen is set to turn off the function of automatically adjusting the brightness or color temperature, and the in-vehicle display screen is detected to obtain second display test data;

[0129] According to the first display test data and the second display test data, display screen color test data is obtained.

[0130] Specifically, according to the first display test data and the second display test data, display screen color test data is obtained, which specifically includes:

[0131] According to the first color gamut of the display screen, a first color set of the display screen is obtained, and the first color set of the display screen includes the colors in the first color gamut of the display screen;

[0132] Based on the first color difference formula, the two colors with the largest color difference value in the first color set of the display screen are used as the first display test colors;

[0133] Obtain the conventional working environment information of the in-vehicle display screen, and the conventional working environment information of the in-vehicle display screen includes the ambient brightness information under different weather and time conditions;

[0134] The highest brightness value in the conventional working environment information of the in-vehicle display screen is used as the maximum value of the test environment brightness;

[0135] Based on the logical analysis of the automatic brightness adjustment of the in-vehicle display screen, the minimum value of the test environment brightness is obtained;

[0136] According to the maximum value of the test environment brightness and the minimum value of the test environment brightness, test environment information is obtained;

[0137] According to the test environment information and the first display test color information, the in-vehicle display screen is detected to obtain first display test data;

[0138] According to the second color gamut of the display screen, a second color set of the display screen is obtained, and the second color set of the display screen includes the colors in the second color gamut of the display screen;

[0139] Based on the second color difference formula, the two colors with the largest color difference values in the second color set of the display screen are used as the second display test colors;

[0140] Based on the second display test color information, the display screen is set to turn off the automatic brightness or color temperature adjustment function, and the in-vehicle display screen is detected to obtain the second display test data;

[0141] According to the first display test data and the second display test data, the display screen color test data is obtained.

[0142] In this solution, the overlapping part of the standard color gamut and the actual display color gamut of the display screen is used as the first color gamut of the display screen. Based on the first display test color information, the display screen is set to turn on the automatic brightness or color temperature adjustment function, and the in-vehicle display screen is detected to obtain the first display test data. Based on the second display test color information, the display screen is set to turn off the automatic brightness or color temperature adjustment function, and the in-vehicle display screen is detected to obtain the second display test data;

[0143] It can be understood that abnormal colors usually appear too saturated or distorted, especially when the display device cannot accurately reproduce specific colors. For colors that overlap with the standard color gamut, the color difference may be small, but in the case of non-overlap, the color deviation and distortion will be more obvious, usually manifested as unrealistic hues or overflow in the color space. Therefore, in this solution, the colors that do not overlap with the standard color gamut are screened, and the characteristic colors are selected as the test conditions for abnormal color display;

[0144] It should be noted that when the in-vehicle display screen needs to automatically adjust the brightness, the human eye's sensitivity to colors has an important impact. Therefore, in this embodiment, the first color difference formula adopts the CIEDE2000 color difference formula. And in the process of color anomaly detection, the influence of human factors is not considered. Therefore, in this embodiment, the second color difference formula adopts the CIE76 color difference formula. Both the CIEDE2000 color difference formula and the CIE76 color difference formula are well-known formulas, so they will not be described.

[0145] According to the display screen color test data, it is judged whether the display screen image display meets the production standard. If not, the in-vehicle display screen production process is adjusted according to the display screen color test data. If so, the quality of the in-vehicle display screen is qualified.

[0146] Specifically, judging whether the display screen image display meets the production standard according to the display screen color test data specifically includes:

[0147] According to the first display test data, the display screen brightness adjustment index is obtained;

[0148] Based on the in-vehicle display screen production standard, the display screen brightness adjustment index threshold is obtained;

[0149] Based on the display screen brightness adjustment index and the display screen brightness adjustment index threshold, determine whether the automatic brightness adjustment of the display screen meets the production standard;

[0150] If the display screen brightness adjustment index does not exceed the display screen brightness adjustment index threshold, the automatic brightness adjustment of the display screen does not meet the production standard, and adjust the automatic brightness adjustment function of the display screen according to the display screen brightness adjustment index;

[0151] If the display screen brightness adjustment index exceeds the display screen brightness adjustment index threshold, the automatic brightness adjustment of the display screen meets the production standard;

[0152] Obtain the second display color brightness information according to the second display test data;

[0153] Based on the second display color brightness information and the color brightness threshold, obtain the display screen color abnormal area;

[0154] Obtain the image display abnormal index according to the second display color brightness information and the display screen color abnormal area;

[0155] Judge whether the image display of the display screen meets the production standard according to the image display abnormal index. If not, adjust the production process of the in-vehicle display screen according to the image display abnormal index. If so, the quality of the in-vehicle display screen is qualified;

[0156] Among them, if the image display abnormal index , the image display of the display screen does not meet the production standard. If , the image display of the display screen meets the production standard;

[0157] The calculation formula of the display screen brightness adjustment index is:

[0158]

[0159] In the formula, E is the display screen brightness adjustment index, is the color difference between two colors of the first display test color after the automatic brightness adjustment is completed, g is the color difference between two colors of the first display test color, and t is the time when the automatic brightness adjustment of the display is completed;

[0160] The calculation formula of the image display abnormal index is:

[0161]

[0162] In the formula, R is the image display abnormal index, is the overlapping area of the display screen color abnormal area of two colors of the second display test color, is the brightness difference value of the display screen color abnormal area, is the length of the in-vehicle display screen, is the width of the in-vehicle display screen, is the color difference between two colors of the second display test color.

[0163] In this solution, according to the display screen brightness adjustment index and the display screen brightness adjustment index threshold, it is judged whether the automatic brightness adjustment of the display screen meets the production standard. Through the image display anomaly index, it is judged whether the image display of the display screen meets the production standard, ensuring that the in-vehicle display screen provides a consistent and true color experience under different lighting and angles, effectively identifying the color deviation of the display screen, ensuring that the visual effect reaches the design standard, improving driving safety and user experience. In this embodiment, the display screen brightness adjustment index threshold is , where represents the standard completion time of the display automatic brightness adjustment.

[0164] Referring to Figure 5 as shown, further, in combination with the above-mentioned method for detecting the quality of an in-vehicle display screen based on image color gamut analysis, a system for detecting the quality of an in-vehicle display screen based on image color gamut analysis is proposed, including:

[0165] A main control module, which is used to obtain the display screen color gamut coverage index according to the regional color gamut coverage information, the regional position influence coefficient and the display color gamut standard coverage information, judge whether the image color gamut of the display screen meets the production standard according to the display screen color gamut coverage index, obtain the display screen brightness adjustment index according to the first display test data, judge whether the automatic brightness adjustment of the display screen meets the production standard according to the display screen brightness adjustment index and the display screen brightness adjustment index threshold, obtain the image display anomaly index according to the second display color brightness information and the display screen color anomaly area, judge whether the image display of the display screen meets the production standard according to the image display anomaly index, obtain the regional range threshold according to the standard color gamut reference coordinate information and the in-vehicle display screen specification information, divide the in-vehicle display screen based on the regional range threshold to obtain the display screen detection area, take the center of the display screen detection area as the position of the display screen detection area, obtain the display screen detection area distribution information, obtain the regional position influence coefficient based on the display screen detection area distribution information, and adjust the production process of the in-vehicle display screen according to the display screen color gamut test data, the display screen brightness adjustment index and the image display anomaly index;

[0166] An information acquisition module, which is used to acquire the in-vehicle display screen information, the in-vehicle display screen parameter information and the in-vehicle display screen image display specification information, obtain the display screen standard color gamut information based on the in-vehicle display screen information, obtain the standard color gamut reference coordinate information according to the display screen standard color gamut information, and obtain the in-vehicle display screen specification information, the in-vehicle display screen length information and the in-vehicle display screen width information according to the in-vehicle display screen information;

[0167] A detection module, which is used to detect the vehicle-mounted display screen based on a color test image, obtain display screen gamut test data, set the display screen to turn on the automatic brightness or color temperature adjustment function based on the first display test color information, detect the vehicle-mounted display screen, obtain the first display test data, set the display screen to turn off the automatic brightness or color temperature adjustment function based on the second display test color information, detect the vehicle-mounted display screen, obtain the second display test data, and obtain the display screen color test data according to the first display test data and the second display test data;

[0168] A display module, which interacts with the main control module and is used to display the display screen detection area, display screen gamut test data, display screen color test data, display screen brightness adjustment index, and image display abnormality index.

[0169] The main control module specifically includes:

[0170] A control unit, which is used to obtain a regional range threshold according to the standard gamut reference coordinate information and vehicle-mounted display screen specification information, divide the vehicle-mounted display screen based on the regional range threshold, obtain the display screen detection area, take the center of the display screen detection area as the position of the display screen detection area, obtain the display screen detection area distribution information, obtain the regional position influence coefficient based on the display screen detection area distribution information, and adjust the vehicle-mounted display screen production process according to the display screen gamut test data, display screen brightness adjustment index, and image display abnormality index;

[0171] An information receiving unit, which interacts with the information acquisition module and the detection module and is used to receive data and transmit it to the evaluation unit;

[0172] An evaluation unit, which is used to obtain the display screen gamut coverage index according to the regional gamut coverage information, regional position influence coefficient, and display gamut standard coverage information, judge whether the display screen image gamut meets the production standard according to the display screen gamut coverage index, obtain the display screen brightness adjustment index according to the first display test data, judge whether the automatic brightness adjustment of the display screen meets the production standard according to the display screen brightness adjustment index and the display screen brightness adjustment index threshold, obtain the image display abnormality index according to the second display color brightness information and the display screen color abnormal area, and judge whether the display screen image display meets the production standard according to the image display abnormality index.

[0173] The information acquisition module specifically includes:

[0174] A first acquisition unit, which is used to acquire vehicle-mounted display screen information, vehicle-mounted display screen parameter information, and vehicle-mounted display screen image display specification information, and obtain the display screen standard gamut information based on the vehicle-mounted display screen information;

[0175] A second acquisition unit, which is configured to acquire standard color gamut reference coordinate information according to the standard color gamut information of the display screen, and acquire the vehicle-mounted display screen specification information, the vehicle-mounted display screen length information, and the vehicle-mounted display screen width information according to the vehicle-mounted display screen information.

[0176] The detection module specifically includes:

[0177] A first detection unit, which is configured to detect the vehicle-mounted display screen based on a color test image and acquire display screen color gamut test data;

[0178] A second detection unit, which is configured to, based on the first display test color information, set the display screen to turn on the automatic brightness or color temperature adjustment function, detect the vehicle-mounted display screen, and acquire first display test data; based on the second display test color information, set the display screen to turn off the automatic brightness or color temperature adjustment function, detect the vehicle-mounted display screen, and acquire second display test data; and acquire display screen color test data according to the first display test data and the second display test data.

[0179] In summary, the advantages of the present invention are as follows: By means of the standard color gamut information of the display screen, a regional range threshold is acquired; by means of the regional range threshold, the vehicle-mounted display screen is divided to acquire a display screen detection area, and the accuracy and reliability of the quality detection of the vehicle-mounted display screen are ensured through the display screen detection area; by means of the regional color gamut coverage information, the regional position influence coefficient, and the display color gamut standard coverage information, a display screen color gamut coverage index is acquired, and the color gamut coverage status of the display screen is accurately evaluated through the display screen color gamut coverage index, ensuring the stability of the production quality; by means of the display screen characteristic color gamut information, the vehicle-mounted display screen is detected to acquire display screen color test data, and whether the image display of the display screen meets the production standard is judged through the display screen color test data, ensuring that the vehicle-mounted display screen provides a consistent and real color experience under different illuminations and angles, effectively identifying the color deviation of the display screen, ensuring that the visual effect reaches the design standard, and improving driving safety and user experience.

[0180] The above has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments, and the principles described in the above embodiments and the specification are only the principles of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and all these changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for detecting the quality of in-vehicle display screens based on image color gamut analysis, characterized in that, Including: Obtain in-vehicle display screen information, where the in-vehicle display screen information includes in-vehicle display screen parameter information and in-vehicle display screen image display specification information; Based on the in-vehicle display screen information, obtain the standard color gamut information of the display screen; According to the standard color gamut information of the display screen, based on the quality detection and analysis of the display screen, obtain the regional range threshold; Based on the regional range threshold, divide the in-vehicle display screen to obtain the display screen detection area; Set the display screen to the standard display mode and turn off the automatic brightness or color temperature adjustment function; Based on the color test image, detect the in-vehicle display screen to obtain the color gamut test data of the display screen; According to the display screen detection area and the color gamut test data of the display screen, determine whether the color gamut of the display screen image meets the production standard. If not, adjust the production process of the in-vehicle display screen according to the color gamut test data of the display screen. If so, obtain the characteristic color gamut information of the display screen according to the color gamut test data of the display screen; According to the characteristic color gamut information of the display screen, detect the in-vehicle display screen to obtain the color test data of the display screen; According to the color test data of the display screen, determine whether the image display of the display screen meets the production standard. If not, adjust the production process of the in-vehicle display screen according to the color test data of the display screen. If so, the quality of the in-vehicle display screen is qualified; The step of detecting the in-vehicle display screen according to the characteristic color gamut information of the display screen to obtain the color test data of the display screen specifically includes: Obtain the actual display color gamut information; According to the standard color gamut information of the display screen and the actual display color gamut information, obtain the first color gamut and the second color gamut of the display screen; Among them, the overlapping part of the standard color gamut and the actual display color gamut of the display screen is used as the first color gamut of the display screen, and the part of the actual display color gamut that does not overlap with the standard color gamut of the display screen is used as the second color gamut of the display screen; Based on the first color gamut and the second color gamut of the display screen, obtain the first display test color information and the second display test color information; Based on the first display test color information, set the display screen to turn on the automatic brightness or color temperature adjustment function and detect the in-vehicle display screen to obtain the first display test data; Based on the second display test color information, set the display screen to turn off the automatic brightness or color temperature adjustment function and detect the in-vehicle display screen to obtain the second display test data; According to the first display test data and the second display test data, obtain the color test data of the display screen.

2. The vehicle-mounted display quality detection method based on image color gamut analysis according to claim 1, wherein The step of dividing the in-vehicle display screen based on the regional range threshold to obtain the display screen detection area specifically includes: According to the standard color gamut information of the display screen, obtain the standard color gamut reference coordinate information, where the standard color gamut reference coordinate information represents the coordinates of the standard color gamut reference color of the display screen in the color space coordinate system; According to the in-vehicle display screen information, obtain the in-vehicle display screen specification information, where the in-vehicle display screen specification information includes the in-vehicle display screen length information and the in-vehicle display screen width information; According to the standard color gamut reference coordinate information and the in-vehicle display screen specification information, obtain the regional range threshold; Based on the regional range threshold, divide the in-vehicle display screen to obtain the display screen detection area.

3. A quality detection method for in-vehicle display screens based on image color gamut analysis according to claim 1, characterized in that Judging whether the display color gamut of the display screen meets the production standard according to the detection area of the display screen and the color gamut test data of the display screen specifically includes: Obtaining the test data of the regional image according to the test data of the display screen image; Obtaining the image color display data corresponding to each detection area of the display screen according to the test data of the regional image; Based on the color space coordinate system, converting the image color display data to obtain the actual display color gamut information, where the actual display color gamut represents the color gamut contour formed with the position of the image color display data in the color space coordinate system as the boundary; Obtaining the standard color gamut contour information according to the standard color gamut information of the display screen; Obtaining the regional color gamut coverage information according to the actual display color gamut information and the standard color gamut contour information; Taking the geometric center of each detection area of the display screen as the position of the detection area of the display screen to obtain the distribution information of the detection areas of the display screen; Obtaining the regional position influence coefficient based on the distribution information of the detection areas of the display screen; Obtaining the standard coverage information of the display color gamut according to the information of the in-vehicle display screen; Obtaining the display color gamut coverage index according to the regional color gamut coverage information, the regional position influence coefficient and the standard coverage information of the display color gamut; Judging whether the display color gamut of the display screen meets the production standard according to the display color gamut coverage index.

4. The vehicle-mounted display quality detection method based on image color gamut analysis according to claim 1, characterized in that, Obtaining the display color test data according to the first display test data and the second display test data specifically includes: Obtaining the first color set of the display screen according to the first color gamut of the display screen, where the first color set of the display screen includes the colors in the first color gamut of the display screen; Based on the first color difference formula, taking the two colors with the largest color difference value in the first color set of the display screen as the first display test colors; Obtaining the information on the normal working environment of the in-vehicle display screen, where the information on the normal working environment of the in-vehicle display screen includes the environmental brightness information under different weather and time conditions; Taking the highest brightness value in the information on the normal working environment of the in-vehicle display screen as the maximum value of the test environment brightness; Obtaining the minimum value of the test environment brightness based on the analysis of the automatic brightness adjustment logic of the in-vehicle display screen; Obtaining the test environment information according to the maximum value of the test environment brightness and the minimum value of the test environment brightness; Detecting the in-vehicle display screen according to the test environment information and the first display test color information to obtain the first display test data; Obtaining the second color set of the display screen according to the second color gamut of the display screen, where the second color set of the display screen includes the colors in the second color gamut of the display screen; Based on the second color difference formula, taking the two colors with the largest color difference value in the second color set of the display screen as the second display test colors; Based on the second display test color information, setting the display screen to turn off the automatic brightness or color temperature adjustment function and detecting the in-vehicle display screen to obtain the second display test data; Obtaining the display color test data according to the first display test data and the second display test data.

5. A quality detection method for in-vehicle display screens based on image color gamut analysis according to claim 1, characterized in that, Judging whether the image display of the display screen meets the production standard according to the display color test data specifically includes: Obtaining the display brightness adjustment index according to the first display test data; Obtaining the threshold value of the display brightness adjustment index based on the production standard of the in-vehicle display screen; Judge whether the automatic brightness adjustment of the display screen meets the production standard according to the display screen brightness adjustment index and the display screen brightness adjustment index threshold; If the display screen brightness adjustment index does not exceed the display screen brightness adjustment index threshold, the automatic brightness adjustment of the display screen does not meet the production standard, and the automatic brightness adjustment function of the display screen is adjusted according to the display screen brightness adjustment index; If the display screen brightness adjustment index exceeds the display screen brightness adjustment index threshold, the automatic brightness adjustment of the display screen meets the production standard; Obtain the second display color brightness information according to the second display test data; Obtain the display screen color abnormal area based on the color brightness threshold according to the second display color brightness information; Obtain the image display abnormal index according to the second display color brightness information and the display screen color abnormal area; Judge whether the image display of the display screen meets the production standard according to the image display abnormal index. If not, adjust the production process of the in-vehicle display screen according to the image display abnormal index. If so, the quality of the in-vehicle display screen is qualified.

6. A vehicle-mounted display quality detection system based on image color gamut analysis, for implementing the quality detection method described in any one of claims 1-5, characterized in that, Including: The main control module is used to obtain the display screen color gamut coverage index according to the regional color gamut coverage information, the regional position influence coefficient and the display color gamut standard coverage information, judge whether the image color gamut of the display screen meets the production standard according to the display screen color gamut coverage index, obtain the display screen brightness adjustment index according to the first display test data, judge whether the automatic brightness adjustment of the display screen meets the production standard according to the display screen brightness adjustment index and the display screen brightness adjustment index threshold, obtain the image display abnormal index according to the second display color brightness information and the display screen color abnormal area, judge whether the image display of the display screen meets the production standard according to the image display abnormal index, obtain the regional range threshold according to the standard color gamut reference coordinate information and the in-vehicle display screen specification information, divide the in-vehicle display screen based on the regional range threshold to obtain the display screen detection area, take the center of the display screen detection area as the position of the display screen detection area, obtain the display screen detection area distribution information, obtain the regional position influence coefficient based on the display screen detection area distribution information, and adjust the production process of the in-vehicle display screen according to the display screen color gamut test data, the display screen brightness adjustment index and the image display abnormal index; The information acquisition module is used to acquire the in-vehicle display screen information, the in-vehicle display screen parameter information and the in-vehicle display screen image display specification information, acquire the display screen standard color gamut information based on the in-vehicle display screen information, acquire the standard color gamut reference coordinate information according to the display screen standard color gamut information, and acquire the in-vehicle display screen specification information, the in-vehicle display screen length information and the in-vehicle display screen width information according to the in-vehicle display screen information; A detection module, which is used to detect the in-vehicle display screen based on a color test image, obtain display screen color gamut test data, set the display screen to turn on the automatic brightness or color temperature adjustment function based on the first display test color information, detect the in-vehicle display screen, obtain the first display test data, set the display screen to turn off the automatic brightness or color temperature adjustment function based on the second display test color information, detect the in-vehicle display screen, obtain the second display test data, and obtain the display screen color test data according to the first display test data and the second display test data; A display module, which interacts with the main control module and is used to display the display screen detection area, the display screen color gamut test data, the display screen color test data, the display screen brightness adjustment index, and the image display abnormality index.

7. The vehicle-mounted display quality detection system based on image color gamut analysis according to claim 6, wherein, The main control module specifically includes: A control unit, which is used to obtain the area range threshold according to the standard color gamut reference coordinate information and the in-vehicle display screen specification information, divide the in-vehicle display screen based on the area range threshold, obtain the display screen detection area, use the center of the display screen detection area as the position of the display screen detection area, obtain the display screen detection area distribution information, obtain the area position influence coefficient based on the display screen detection area distribution information, and adjust the in-vehicle display screen production process according to the display screen color gamut test data, the display screen brightness adjustment index, and the image display abnormality index; An information receiving unit, which interacts with the information acquisition module and the detection module and is used to receive data and transmit it to the evaluation unit; An evaluation unit, which is used to obtain the display screen color gamut coverage index according to the area color gamut coverage information, the area position influence coefficient, and the display color gamut standard coverage information, judge whether the display screen image color gamut meets the production standard according to the display screen color gamut coverage index, obtain the display screen brightness adjustment index according to the first display test data, judge whether the automatic brightness adjustment of the display screen meets the production standard according to the display screen brightness adjustment index and the display screen brightness adjustment index threshold, obtain the image display abnormality index according to the second display color brightness information and the display screen color abnormality area, and judge whether the display screen image display meets the production standard according to the image display abnormality index.

8. The vehicle-mounted display quality detection system based on image color gamut analysis according to claim 6, characterized in that, The information acquisition module specifically includes: A first acquisition unit, which is used to acquire the in-vehicle display screen information, the in-vehicle display screen parameter information, and the in-vehicle display screen image display specification information, and obtain the display screen standard color gamut information based on the in-vehicle display screen information; A second acquisition unit, which is used to obtain the standard color gamut reference coordinate information according to the display screen standard color gamut information, and obtain the in-vehicle display screen specification information, the in-vehicle display screen length information, and the in-vehicle display screen width information according to the in-vehicle display screen information.

9. The vehicle-mounted display quality detection system based on image color gamut analysis according to claim 6, characterized in that, The detection module specifically includes: A first detection unit, which is used to detect the in-vehicle display screen based on a color test image and obtain the display screen color gamut test data; The second detection unit is configured to, based on the first display test color information, set the display screen to turn on the automatic brightness or color temperature adjustment function, detect the in-vehicle display screen, obtain first display test data, based on the second display test color information, set the display screen to turn off the automatic brightness or color temperature adjustment function, detect the in-vehicle display screen, obtain second display test data, and obtain display screen color test data according to the first display test data and the second display test data.

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