Display correction method and display correction system

Abstract

The invention provides a display correction method and a display correction system. The display correction method comprises the following steps: S1, selecting a test range; s2, based on the test range, controlling a display device to display a first test image in a test image set on a display surface; s3, receiving a detection result of the first test image displayed on the display surface by a color corrector; s4, judging whether the detection result meets a preset standard or not; if yes, taking the next test image in the test image set as the first test image, and entering the step S2; and if not, adjusting the corresponding parameters of the image mode corresponding to the display device, and entering the step S2.

Description

Technical Field

[0001] The present invention relates to the field of display correction, and in particular to a display correction method and a display correction system. Background Art

[0002] Traditional display device color calibration, such as projector color calibration, is generally performed by operators using a colorimeter and professional software to read the color combination data projected by the projector. Then, based on the read data, the projector parameters are manually adjusted repeatedly to improve the color accuracy of the projector.

[0003] However, when manually adjusting the parameters of the projection device to change the image parameters of the projector, the adjustment operation is usually repeated several times until the final color performance reaches an ideal value, which is complicated, cumbersome and time-consuming.

[0004] In addition, when manually adjusting the parameters of the projection device, the correction effect often depends on the operator's experience and skill level, and it is difficult to ensure the accuracy and consistency of the correction. Ordinary consumers who do not have rich experience in color theory and projector adjustment cannot calibrate the projection device conveniently and accurately, which increases the complexity and cost of calibration.

[0005] Therefore, it is necessary to design a new display correction method and display correction system to improve the above defects. Summary of the invention

[0006] The object of the present invention is to provide a display correction method and a display correction system, which can automatically and accurately correct the parameters of a display device, are easy to operate, and are suitable for ordinary users who do not have rich experience in color theory and display device color calibration.

[0007] To achieve the above object, the present invention provides a display correction method and a display correction system. The display correction method comprises the following steps: S1. Select the test scope; S2. Based on the test range, controlling the display device to display the first test image in the test image set on the display surface; S3, receiving a detection result of the first test image displayed on the display surface by a color calibrator; S4, determining whether the detection result meets the preset standard; If so, the next test image in the test image set is used as the first test image, and the process proceeds to step S2; if not, the corresponding parameters of the corresponding image mode of the display device are adjusted, and the process proceeds to step S2.

[0008] Preferably, the test range is color gamut and / or gamma; When the test range includes the color gamut, the test image set includes a plurality of pure color images of different colors; when the test range includes gamma, the test image set includes a plurality of grayscale images of different grayscales.

[0009] Preferably, the plurality of pure color images include a red image, a green image, a blue image, a white image, a cyan image, a magenta image and a yellow image; and the plurality of grayscale images include grayscale images of different gray levels transitioning from pure white to pure black.

[0010] Preferably, the steps S1 and S2 include: Based on the test range, presetting the color gamut standard and / or target gamma and output dynamic range of the display device; wherein, based on the preset color gamut standard and / or the target gamma and the output dynamic range, the preset standard corresponding to each test image in the test image set is determined; and, An image mode in the display device is selected for storing the corresponding parameter.

[0011] Preferably, the step S1 further comprises setting a size of a picture displayed on the display surface; and the step S2 further comprises setting a size of the first test image based on the picture size.

[0012] Preferably, in step S3, after controlling the display device to display the first test image on the display surface for a preset time, the detection result of the colorimeter is received.

[0013] Preferably, step S4 further includes: S5, after the test is completed, a calibration report is generated.

[0014] Preferably, the display device is a projection device, the display surface is a projection surface, and a control device is connected to the color calibrator to receive the detection result of the color calibrator; Before step S2, the method further includes: testing the connection between the control device and the projection device, and testing the connection between the control device and the colorimeter; if the connection is successful, the method proceeds to step S2.

[0015] Preferably, a display correction system comprises: A color calibrator, used to detect the display surface of the display device to be tested; and A control device is coupled to the display device to be tested and the color calibrator, and the control device is configured to include: Select module to select the test scope; A display control module, for controlling the display device to display a first test image in the test image set on a display surface based on the test range; A receiving module, used for receiving the detection result of the color calibrator; and The judgment and adjustment module is used to judge whether the detection result meets the preset standard. If so, the next test image in the test image set is used as the first test image, and the module is jumped to the display control module, the receiving module and the judgment and adjustment module in sequence; if not, the corresponding parameters of the corresponding image mode of the display device are adjusted, and the module is jumped to the display control module, the receiving module and the judgment and adjustment module in sequence.

[0016] Preferably, the test range includes color gamut and / or gamma; wherein, when the test range includes color gamut, the test image set includes a plurality of pure color images of different colors; when the test range includes gamma, the test image set includes a plurality of grayscale images of different grayscales.

[0017] Preferably, the plurality of pure color images include a red image, a green image, a blue image, a white image, a cyan image, a magenta image and a yellow image; and the plurality of grayscale images include grayscale images of different gray levels transitioning from pure white to pure black.

[0018] Preferably, the control device further comprises a setting module, the setting module being used to: preset the color gamut standard and / or target gamma and output dynamic range of the display device based on the test range; wherein, based on the preset color gamut standard and / or the target gamma and the output dynamic range, determine the preset standard corresponding to each test image in the test image set; and, An image mode in the display device is selected for storing the corresponding parameter.

[0019] Preferably, the setting module is further used to set the size of the picture displayed on the display surface, and the display control module is further used to set the size of the first test image based on the picture size.

[0020] Preferably, the receiving module is used to receive the detection result of the color calibrator after the first test image is displayed on the display surface for a preset time.

[0021] Preferably, it also includes: a report generation module, which is used to generate a calibration report after the test is completed.

[0022] Preferably, the display device is a projection device, and the display surface is a projection surface; the display correction system also includes a connection test module for testing the connection between the control device and the projection device and testing the connection between the control device and the colorimeter.

[0023] Compared with the prior art, the display correction method of the present invention includes: Step S1, selecting a test range. S2, based on the selected test range, controlling the display device to display the first test image in the test image set on the display surface. S3, using a colorimeter to detect the test image displayed on the display surface and receiving the detection result of the colorimeter. S4, judging whether the detection result meets the preset standard. If it meets the preset standard, the next test image in the test image set is used as the above-mentioned first test image and is re-displayed on the display surface, and then entering step S2; if it does not meet the preset standard, the corresponding parameters of the corresponding image mode of the display device are adjusted and then entering step S2. Through iterative testing and adjustment, it is achieved that the display of all test images on the display surface meets the preset standard, and the parameters of the display device can be automatically and accurately corrected without manual adjustment, thereby reducing the complexity and cost of color correction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a flow chart of a display calibration method according to one embodiment of the present invention; Figure 2 A schematic diagram of the structure of a projection correction system proposed in one embodiment of the present invention; Figure 3 A functional block diagram of a projection correction system according to one embodiment of the present invention; Figure 4 This is a schematic diagram of specific steps that a connection test module in a projection correction system according to one embodiment of the present invention is configured to perform. DETAILED DESCRIPTION

[0025] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0026] Certain words are used in the specification and claims to refer to specific components. Those with ordinary knowledge in the field should understand that manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but rather use differences in components' functions as the criteria for distinction. The term "including" mentioned throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to".

[0027] Reference Figure 1 As shown, a flow chart of a display correction method proposed in one embodiment of the present invention is disclosed. Figure 1 As shown, the display calibration method of the display device 10 is performed according to the following steps: Step S1, selecting a test range, specifically the test range is color gamut and / or gamma.

[0028] In addition, the image size displayed on the display surface 40 is set, the color gamut standard and / or target gamma and output dynamic range of the display device 10 are preset based on the above test range, and the image mode for storing corresponding parameters in the display device 10 is selected.

[0029] Step S2, based on the above test range, control the display device 10 to display the first test image in the test image set on the display surface 40. Wherein, when the test range is the color gamut, the above test image set includes a plurality of pure color images of different colors; when the test range is gamma, the above test image set includes a plurality of grayscale images of different grayscales. And, when the test range is the color gamut and gamma, the test image set includes the above multiple pure color images and multiple grayscale images. In addition, in the above step S2, the size of the first test image is also set based on the set screen size, and the size of the first test image displayed on the display surface 40 is controlled to be the same as the screen size.

[0030] In this embodiment, the above-mentioned multiple pure color images are preferably red images, green images, blue images, white images, cyan images, magenta images and yellow images; the above-mentioned multiple grayscale images are, for example, grayscale images with 11 different gray levels that gradually transition from pure white to pure black, but the present invention is not limited to this.

[0031] Step S3 , receiving the detection result of the color calibrator 20 on the first test image displayed on the display surface 40 .

[0032] Step S4, determining whether the detection result meets a preset standard; wherein the preset standard is determined based on the preset color gamut standard and / or target gamma and output dynamic range.

[0033] If the detection result meets the preset standard, the next test image in the above test image set is used as the first test image, and the process proceeds to step S2; if the detection result does not meet the preset standard, the corresponding parameters of the corresponding image mode of the display device 10 are adjusted, and the process proceeds to step S2. The corresponding parameters adjusted in step S4 are stored in the corresponding image mode of the display device 10.

[0034] It can be seen that the display correction method proposed by the present invention is an automatic correction process. Through the above process-based and step-by-step operations, iterative testing and adjustment can be performed to conveniently and accurately adjust the corresponding parameters of the corresponding image mode in the display device 1010, effectively improve the color accuracy of the display device 1010, and improve the user's visual experience.

[0035] For example, when the test range is the color gamut, the display device 10 is controlled to display the first test image (such as one of the red image, green image, blue image, white image, cyan image, magenta image and yellow image) in the test image set on the display surface 40, and the color calibrator 20 is capable of detecting the color coordinates of the corresponding color, and the color coordinates are represented by x, y values ​​(for the CIE 1931 chromaticity diagram) or u', v' values ​​(for the CIE 1976 chromaticity diagram) to define the position of the corresponding color on the chromaticity diagram, and determine whether the detection result of the color calibrator 20 meets the preset standard. If it does not meet the preset standard, the corresponding parameters of the corresponding image mode of the display device 10 (such as the hue, saturation and brightness parameters of the corresponding color in the color management of the display device 10) are adjusted to minimize the color difference value △E to provide color accuracy. In addition, since the test image set includes red, green, blue, white, cyan, magenta and yellow images, it is possible to calibrate the corresponding parameters of the corresponding image mode in the display device 10 to achieve the accuracy of all colors and realize color correction.

[0036] Furthermore, when the test range is gamma, the display device 10 is controlled to display the first test image in the test image set on the display surface 40 (such as one of the grayscale images with 11 different grayscale levels that gradually transition from pure white to pure black), and the colorimeter 20 can, for example, detect the brightness output of the grayscale image of the corresponding grayscale level to obtain the actual grayscale value of the display device 10 when displaying the grayscale image. Then, it is determined whether the relationship between the detected actual grayscale value and the input grayscale meets the preset standard. If it does not meet the preset standard, the corresponding parameters of the corresponding image mode of the display device 10, such as the Gamma parameter, are adjusted. In this embodiment, by using 11 grayscale images with different grayscale levels that gradually transition from pure white to pure black, it can be ensured that the image display effect of the display device 10 is effectively improved after correction. It can be understood that when the test range is color gamut and gamma, the display correction method proposed in the present invention can effectively correct the color gamut and gamma of the corresponding image mode of the display device 10. The target gamma value is set to 2.2, for example, but not limited thereto. In addition, the image mode for storing the corresponding parameters in the display device 10 is selected to be, for example but not limited to, one of the standard mode, dynamic mode and movie mode.

[0037] In one embodiment, when the corresponding parameters of the corresponding image mode of the display device 10 are adjusted, the picture on the display surface 40 can change in real time. This instant feedback mechanism enables the user to observe the changes in the picture effect in real time, which is more intuitive. In addition, the picture on the display surface 40 will change during the corresponding parameter adjustment process, but the change is smooth and continuous, so that the user will not feel that the picture on the display surface 40 jumps frequently, which can improve the user experience.

[0038] In one of the embodiments, the above-mentioned step S2 also includes display environment setting prompt information and the display device 10 preheating prompt information, so that the user can adjust / confirm the environmental state of the above-mentioned display device 10 to meet the preset projection environment requirements. The preset projection environment requirements are, for example, pre-starting the display device 10 for 30 minutes, the environmental brightness is less than 3fl, turning off the lights in the environment, and drawing the curtains.

[0039] In one embodiment, after the first test image is displayed on the display surface 40 for a preset time in the above step S3, the detection result of the color calibrator 20 is received, so that the detection result is more stable and reliable.

[0040] In one embodiment, after the step S4, the following further comprises: step S5, after the test is completed, a calibration report is generated, the calibration report is displayed on the display surface 40, and the calibration report can be saved and printed by the user. The calibration report includes but is not limited to a color gamut coverage diagram, a gamma correction curve comparison, and a ΔE color difference value comparison, so as to provide intuitive feedback to the user.

[0041] In one embodiment, the display device 10 is a projection device, the display surface 40 is a projection surface, and a control device 30 (such as a PC device) is connected to the colorimeter 20 to receive the detection result of the colorimeter 20. When the display device 10 is a projection device, the colorimeter 20 is at a suitable distance from the projection surface and the sensing end of the colorimeter 20 is oriented toward the center of the image projected on the projection surface. In addition, before the step S2, the step also includes testing the connection between the control device 30 and the projection device, and testing the connection between the control device 30 and the colorimeter 20; if the connection is successful, the step S2 is entered.

[0042] If the display device 10 is a monitor, the color corrector 20 is placed flat on the screen of the monitor to ensure that the sensor of the color corrector 20 can be aligned with the screen.

[0043] In summary, the display correction method of the present invention is an automatic correction process. Iterative testing and adjustment are performed through process-based and step-by-step operation steps to achieve that the display of all test images on the display surface 40 meets the preset standards, and the parameters of the display device 10 are automatically and accurately corrected without manual adjustment. The corrected display device 10 can present various colors more accurately, avoid color distortion or deviation, and improve the user's visual experience.

[0044] Furthermore, the present invention also proposes a display correction system for executing the above display correction method. Figure 2 As shown, the display correction system includes a display device 10 to be tested ( Figure 2The display device 10 is a projection device as an example), a color corrector 20 and a control device 30. The color corrector 20 is used to detect the display surface 40 of the display device 10, and the control device 30 is coupled to the display device 10 and the color corrector 20.

[0045] like Figure 3 As shown, in one embodiment, the control device 30 is configured to include a selection module M1, a display control module M3, a receiving module M4 and a judgment and adjustment module M5.

[0046] The selection module M1 is used to select a test range, and the test range is a color gamut and / or gamma.

[0047] The display control module M3 is used to control the display device 10 to display the first test image in the test image set on the display surface 40 based on the test range. When the test range is the color gamut, the test image set includes a plurality of pure color images of different colors (e.g., red image, green image, blue image, white image, cyan image, magenta image and yellow image); when the test range is gamma, the test image set includes a plurality of grayscale images of different grayscales (e.g., grayscale images of 11 different grayscale levels transitioning from pure white to pure black); and, when the test range is the color gamut and gamma, the test image set includes the plurality of pure color images and the plurality of grayscale images. The receiving module M4 is used to receive the detection result of the colorimeter 20. And, The judgment and adjustment module M5 is used to judge whether the detection result meets the preset standard. If so, the next test image in the test image set is used as the first test image, and the display control module M3, the receiving module M4 and the judgment and adjustment module M5 are sequentially jumped; if not, the corresponding parameters of the corresponding image mode of the display device 10 are adjusted and the adjusted corresponding parameters are stored in the corresponding image mode of the display device 10, and the display control module M3, the receiving module M4 and the judgment and adjustment module M5 are sequentially jumped. In this way, the display of all test images on the display surface 40 meets the preset standard, and the corresponding parameters of the corresponding image mode of the display device 10 are automatically and accurately corrected without manual adjustment. The corrected display device 10 can present various colors more accurately, avoid color distortion or deviation, and improve the user's visual experience.

[0048] Furthermore, in one embodiment, the control device 30 further includes a setting module M2, which is used to: set the screen size displayed on the display surface 40, preset the color gamut standard and / or target gamma and output dynamic range of the display device 10 based on the test range, and select an image mode in the display device 10 for storing corresponding parameters. The preset standard is determined based on the preset color gamut standard and / or target gamma and output dynamic range. The display control module M3 is also used to set the size of the first test image based on the set screen size, and control the size of the first test image displayed on the display surface 40 to be the same as the screen size; the receiving module M4 is used to receive the detection result of the color calibrator 20 after displaying the first test image on the display surface 40 for a preset time, so as to make the detection result more accurate and stable.

[0049] Further, in one embodiment, the display calibration system includes a report generation module M6. The report generation module M6 is used to generate a calibration report after the test is completed. The calibration report is displayed on the display surface 40, and the calibration report can be saved and printed by the user. The calibration report includes but is not limited to a color gamut coverage diagram, a gamma correction curve comparison, and a ΔE color difference value comparison, so as to provide intuitive feedback to the user.

[0050] Taking the display device 10 as an example, the colorimeter 20 is placed flat on the screen of the display to ensure that the sensor of the colorimeter 20 can be aligned with the screen. The display correction system also includes a connection test module for testing the connection between the control device 30 and the projection device and the connection between the control device 30 and the colorimeter 20. Taking the display device 10 as an example, the projection device is placed in a daily use environment, and the projection device is connected to the control device 30 with an HDMI cable; the colorimeter 20 is connected to the control device 30 with a USB-A cable. Figure 4 As shown, the connection test module is configured to perform the following steps: S01. Determine the model of the above-mentioned projection device. S02. Determine the control instruction transmission mode (network cable connection or RS-232 connection) between the above-mentioned control device 30 and the projection device. S03. When the above-mentioned control device 30 transmits the control instruction to the projection device via the network cable, the control device 30 verifies the IP address of the projection device and establishes communication between the projection device and the control device 30. S04. When the control device 30 transmits the control instruction to the projection device via RS-232, the control device 30 obtains the port number of the above-mentioned projection device, verifies the baud rate of the projection device and establishes communication between the above-mentioned projection device and the control device 30. S05. Determine whether the communication between the projection device and the control device 30 is successfully established; if so, proceed to the next step S07; if not, proceed to step S06. The above-mentioned control device 3030 outputs connection check prompt information (such as network and cable connection check prompts), and returns to execute step S01.

[0051] S07, select the colorimeter 20 model, S08 determine whether the communication connection between the above colorimeter 20 and the control device 30 is successfully established; at the same time, the above control device 30 outputs user prompt information (for example, prompting the sensing end of the colorimeter 20 to face the center of the projected image on the projection surface). If not, enter step S09. The above control device 30 displays the network and cable connection check prompt information and returns to execute step S07. If so, enter step S10. The control device 30 initializes the above colorimeter 20.

[0052] In addition, the control device 30 also displays environmental setting prompt information and display device 10 preheating prompt information, so that the user can confirm that the environmental state of the display device 10 meets the preset projection environment requirements. The preset projection environment requirements are, for example: the display device 10 is pre-started for 30 minutes, the ambient brightness is <3fl, the lights in the environment are turned off, and the curtains are drawn.

[0053] In this way, by displaying a test image and receiving feedback from the colorimeter 20, the color gamut and / or gamma of the display device 10 is automatically corrected, and the user can calibrate the display device 10 conveniently and accurately, reducing the complexity and cost of color calibration.

[0054] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. A display correction method, characterized in that: The following steps are involved: S1. Select the test scope; S2. Based on the test range, controlling the display device to display the first test image in the test image set on the display surface; S3, receiving a detection result of the first test image displayed on the display surface by a color calibrator; S4, determining whether the detection result meets the preset standard; If so, the next test image in the test image set is used as the first test image, and the process proceeds to step S2; if not, the corresponding parameters of the corresponding image mode of the display device are adjusted, and the process proceeds to step S2.

2. The display correction method according to claim 1, wherein: The test range is color gamut and / or gamma; When the test range includes the color gamut, the test image set includes a plurality of pure color images of different colors; when the test range includes gamma, the test image set includes a plurality of grayscale images of different grayscales.

3. The display correction method according to claim 2, wherein: The plurality of pure color images include a red image, a green image, a blue image, a white image, a cyan image, a magenta image and a yellow image; the plurality of grayscale images include grayscale images of different gray levels transitioning from pure white to pure black.

4. The display correction method according to claim 1, wherein: The steps S1 and S2 include: Based on the test range, presetting the color gamut standard and / or target gamma and output dynamic range of the display device; wherein, based on the preset color gamut standard and / or the target gamma and the output dynamic range, the preset standard corresponding to each test image in the test image set is determined; and, An image mode in the display device is selected for storing the corresponding parameter.

5. The display correction method according to claim 1, wherein: The step S1 also includes setting the size of the picture displayed on the display surface; the step S2 also sets the size of the first test image based on the picture size.

6. The display correction method according to claim 1, wherein: In step S3, after the display device is controlled to display the first test image on the display surface for a preset time, the detection result of the color calibrator is received.

7. The display correction method according to claim 1, wherein: The step S4 also includes: S5, the test is completed and a calibration report is generated.

8. The display correction method according to claim 1, wherein: The display device is a projection device, the display surface is a projection surface, and a control device is connected to the color calibrator to receive the detection result of the color calibrator; Before step S2, the method further includes: testing the connection between the control device and the projection device, and testing the connection between the control device and the colorimeter; if the connection is successful, the method proceeds to step S2.

9. A display correction system, characterized in that: include: A color calibrator, used for detecting the display surface of the display device to be tested; as well as, A control device is coupled to the display device to be tested and the color calibrator, and the control device is configured to include: Select module to select the test scope; A display control module, for controlling the display device to display a first test image in the test image set on a display surface based on the test range; A receiving module, used for receiving the detection result of the color calibrator; and The judgment and adjustment module is used to judge whether the detection result meets the preset standard. If so, the next test image in the test image set is used as the first test image, and the module is jumped to the display control module, the receiving module and the judgment and adjustment module in sequence; if not, the corresponding parameters of the corresponding image mode of the display device are adjusted, and the module is jumped to the display control module, the receiving module and the judgment and adjustment module in sequence.

10. The display correction system according to claim 9, characterized in that: The test range includes color gamut and / or gamma; when the test range includes color gamut, the test image set includes multiple pure color images of different colors; when the test range includes gamma, the test image set includes multiple grayscale images of different grayscales.

11. The display correction system according to claim 10, wherein: The plurality of pure color images include a red image, a green image, a blue image, a white image, a cyan image, a magenta image and a yellow image; the plurality of grayscale images include grayscale images of different gray levels transitioning from pure white to pure black.

12. The display correction system according to claim 9, wherein: The control device further includes a setting module, which is used to: preset the color gamut standard and / or target gamma and output dynamic range of the display device based on the test range; wherein, based on the preset color gamut standard and / or the target gamma and the output dynamic range, determine the preset standard corresponding to each test image in the test image set; and An image mode in the display device is selected for storing the corresponding parameter.

13. The display correction system according to claim 12, wherein: The setting module is further used to set the size of the picture displayed on the display surface, and the display control module is further used to set the size of the first test image based on the picture size.

14. The display correction system according to claim 9, wherein: The receiving module is used for receiving the detection result of the color calibrator after the first test image is displayed on the display surface for a preset time.

15. The display correction system according to claim 9, wherein: Also includes: The report generation module is used to generate a calibration report after the test is completed.

16. The display correction system according to claim 9, wherein: The display device is a projection device, and the display surface is a projection surface; the display correction system also includes a connection test module for testing the connection between the control device and the projection device and the connection between the control device and the color corrector.

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