Ink color detection device, method, equipment and medium

Abstract

The embodiments of the present application provide an ink color detection device, method, equipment and medium. The ink color detection device includes a control module, at least two image acquisition devices and a display screen fixing component. In the embodiments of the present application, the control module of the ink color detection device determines which image acquisition device with a preset angle to use to acquire the image of the LED display screen to be detected according to different target types of the LED display screen to be detected, thereby ensuring that the image of the LED display screen to be detected acquired by the image acquisition device does not include a mirror reflection image of the image acquisition device, thereby improving the accuracy of ink color detection. The control module determines the LAB image corresponding to the image acquired by the image acquisition device through the image acquired by the image acquisition device, and determines the ink color level of the LED display screen to be detected according to the pixel value of the preset channel in the LAB image and the threshold range corresponding to the preset channel, thereby improving the efficiency of ink color detection.

Description

Technical Field

[0001] The present application relates to the field of optical detection technology, and in particular to an ink color detection device, method, equipment and medium. Background Art

[0002] Traditional LED display screens will have ink color differences in the off-screen mode, which is mainly caused by PCB board color differences, film pasting, glue filling and other operations. In the off-screen mode, the ink color differences of LED display screens will cause inconsistent ink colors between LED display screens, which will affect the user experience.

[0003] In order to solve the problem of inconsistent ink color between LED screens, we can start from the LED screen production process and strictly control the LED screen production process. However, there are many uncertain factors when performing operations such as film pasting and glue filling on LED screens, and it increases the cost of LED screen production. In order to solve the problem of inconsistent ink color between LED screens, we can also classify the ink color of LED screens to ensure that LED screens with similar ink colors are used in the same area during the installation process, or that manufacturers sell LED screens with similar ink colors to the same buyer when selling. At present, most manufacturers use manual classification methods, and inspection personnel stand at different angles to observe the consistency of ink color and classify LED screens.

[0004] In order to improve the efficiency of LED display classification, the LED display can be classified by ink color detection. In the prior art, a color array camera and a black and white array camera are used to obtain the color information and grayscale information of the LED display to be detected, respectively, and the LED display to be detected is classified by the color information and grayscale information. However, the method of classifying the LED display to be detected is cumbersome and inefficient; and there are different types of LED display screens on the market, for example, some LED display screens are completely matte black and can achieve diffuse reflection of light; some LED display screens are half-bright and can achieve partial mirror reflection; some LED display screens are fully bright and can achieve complete mirror reflection. The above method is not suitable for all types of LED display screens on the market. The mirror reflection image of the image acquisition device may appear on the LED display screen, thereby reducing the accuracy of ink color detection. Summary of the invention

[0005] The present application provides an ink color detection method, device, equipment and medium to solve the problems of low efficiency and accuracy in the ink color detection process of the prior art.

[0006] In a first aspect, the present application provides an ink color detection device, the device comprising a control module, at least two image acquisition devices and a display screen fixing component; the display screen fixing component is used to fix an LED display screen to be detected; a lens of at least one first image acquisition device is parallel to the LED display screen to be detected after installation; an axis of a lens of at least one second image acquisition device is arranged at a preset angle to the LED display screen to be detected after installation;

[0007] The at least two image acquisition devices are respectively connected to the control module for acquiring images;

[0008] The control module is used to receive a detection instruction, obtain the target type of the LED display screen to be detected contained in the detection instruction; determine the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, and select the corresponding image acquisition device according to the target acquisition angle; determine the LAB image corresponding to the image acquired by the image acquisition device, and determine the ink color level of the LED display screen to be detected according to the pixel value of a preset channel in the LAB image and the threshold range corresponding to the preset channel.

[0009] In a second aspect, the present application further provides an ink color detection method, the method comprising:

[0010] Receive a detection instruction, and obtain the target type of the LED display screen to be detected contained in the detection instruction;

[0011] Determine the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, and select the corresponding image acquisition device according to the target acquisition angle;

[0012] Determine a LAB image corresponding to the image acquired by the image acquisition device, and determine the ink color level of the LED display screen to be detected according to the pixel value of a preset channel in the LAB image and the threshold range corresponding to the preset channel.

[0013] In a third aspect, the present application further provides an ink color detection device, the device comprising:

[0014] An acquisition module, used for receiving a detection instruction, and acquiring a target type of the LED display screen to be detected contained in the detection instruction;

[0015] A determination module, used to determine the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, and select the corresponding image acquisition device according to the target acquisition angle;

[0016] The detection module is used to determine the LAB image corresponding to the image captured by the image acquisition device, and determine the ink color level of the LED display screen to be detected according to the pixel value of the preset channel in the LAB image and the threshold range corresponding to the preset channel.

[0017] In a fourth aspect, the present application further provides an electronic device, which includes at least a processor and a memory, and the processor is used to implement the steps of any of the above-mentioned ink color detection methods when executing a computer program stored in the memory.

[0018] In a fifth aspect, the present application further provides a computer-readable storage medium storing a computer program, which implements the steps of any of the above-mentioned ink color detection methods when executed by a processor.

[0019] The embodiments of the present application provide an ink color detection device, method, equipment and medium. The ink color detection device includes a control module, at least two image acquisition devices and a display screen fixing component. In the embodiments of the present application, the control module of the ink color detection device determines which image acquisition device with a preset angle to use to acquire the image of the LED display screen to be detected according to different target types of the LED display screen to be detected, thereby ensuring that the image of the LED display screen to be detected acquired by the image acquisition device does not include a mirror reflection image of the image acquisition device, thereby improving the accuracy of ink color detection. The control module determines the LAB image corresponding to the image acquired by the image acquisition device through the image acquired by the image acquisition device, and determines the ink color level of the LED display screen to be detected according to the pixel value of the preset channel in the LAB image and the threshold range corresponding to the preset channel, thereby improving the efficiency of ink color detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of the structure of an ink color detection device provided in an embodiment of the present application;

[0022] Figure 2a A schematic diagram of the installation position of the first image acquisition device provided in an embodiment of the present application;

[0023] Figure 2b A schematic diagram of the installation position of the second image acquisition device provided in an embodiment of the present application;

[0024] Figure 3aA schematic diagram of the installation positions of the first image acquisition device and the fill light provided in the embodiment of the present application;

[0025] Figure 3b A schematic diagram of the installation positions of the second image acquisition device and the fill light provided in the embodiment of the present application;

[0026] Figure 4 A schematic diagram of a process of an ink color detection method provided in an embodiment of the present application;

[0027] Figure 5 A schematic diagram of the structure of an ink color detection device provided in an embodiment of the present application;

[0028] Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the embodiment of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiment is only a part of the embodiment of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0030] The embodiments of the present application provide an ink color detection device, method, equipment and medium. The ink color detection device includes a control module, at least two image acquisition devices and a display screen fixing component. In the embodiments of the present application, the control module of the ink color detection device determines which image acquisition device with a preset angle to use to acquire the image of the LED display screen to be detected according to different target types of the LED display screen to be detected, thereby ensuring that the image of the LED display screen to be detected acquired by the image acquisition device does not include a mirror reflection image of the image acquisition device, thereby improving the accuracy of ink color detection. The control module determines the LAB image corresponding to the image acquired by the image acquisition device through the image acquired by the image acquisition device, and determines the ink color level of the LED display screen to be detected according to the pixel value of the preset channel in the LAB image and the threshold range corresponding to the preset channel, thereby improving the efficiency of ink color detection.

[0031] Embodiment 1:

[0032] Figure 1A schematic diagram of the structure of an ink color detection device provided in an embodiment of the present application, as shown in the figure, the device 10 includes a control module 101, at least two image acquisition devices 102 and a display screen fixing component 103; the display screen fixing component 103 is used to fix the LED display screen to be detected; the lens of at least one first image acquisition device 1021 is parallel to the LED display screen to be detected after installation; the axis of the lens of at least one second image acquisition device 1022 is set at a preset angle to the LED display screen to be detected after installation;

[0033] The at least two image acquisition devices are respectively connected to the control module for acquiring images;

[0034] The control module 101 is used to receive a detection instruction, obtain the target type of the LED display screen to be detected contained in the detection instruction; determine the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, and select the corresponding image acquisition device according to the target acquisition angle; determine the LAB image corresponding to the image acquired by the image acquisition device, and determine the ink color level of the LED display screen to be detected according to the pixel value of a preset channel in the LAB image and the threshold range corresponding to the preset channel.

[0035] In order to complete the detection of the ink color of the LED display screen in the off mode, the ink color detection device provided in the embodiment of the present application includes a control module 101, at least two image acquisition devices 102 and a display screen fixing component 103, wherein the image acquisition device 102 can be a color image acquisition device such as a color area array camera, and the display screen fixing component 103 can fix the LED display screen to be detected, for example, it can be a component such as a bracket or a clamp that can fix the display screen.

[0036] In order to improve the accuracy of ink color detection, the mirror reflection image of the image acquisition device will not appear in the images acquired by the image acquisition device for different types of LED display screens. In the embodiment of the present application, the lens of at least one first image acquisition device 1021 in the ink color detection device is parallel to the LED display screen to be detected after installation, that is, the angle between the axis of the lens of at least one first image acquisition device 1021 and the plane where the LED display screen to be detected after installation is located is equal to 90°, and the at least one first image acquisition device 1021 is used to acquire the image of the LED display screen to be detected on the front of the LED display screen to be detected; the angle between the axis of the lens of at least one second image acquisition device 1022 and the LED display screen to be detected after installation is less than 90°, wherein the preset angle can be 30° to 45°. The specific preset angle can be set according to the focal length of the lens of the image acquisition device and the size of the LED display screen to be detected that can be installed on the display screen fixing component 103, as long as the image acquired by the image acquisition device is clear and discernible.

[0037] Figure 2a A schematic diagram of the installation position of the first image acquisition device provided in the embodiment of the present application, such as Figure 2a As shown, the lens of at least one first image acquisition device 1021 is parallel to the LED display screen to be detected after installation, that is, the lens of the first image acquisition device 1021 is parallel to the plane where the display screen fixing component is located, and in order to ensure that the image of the LED display screen to be detected acquired by the first image acquisition device 1021 is uniform on the left and right, it should be ensured during installation that the axis of the lens of the first image acquisition device 1021 is collinear with the axis of the LED display screen to be detected after installation, that is, the foot of the perpendicular between the axis of the lens of the first image acquisition device 1021 and the plane where the LED display screen to be detected is located is the midpoint of the LED display screen to be detected.

[0038] Figure 2b A schematic diagram of the installation position of the second image acquisition device provided in the embodiment of the present application, such as Figure 2b As shown, the second image acquisition device 1022 is located on the side of the LED display screen to be detected, and the angle between the axis of the lens of the second image acquisition device 1022 and the plane where the LED display screen to be detected is located is less than 90°, which can effectively avoid the mirror reflection image of the LED display screen to be detected.

[0039] Specifically, since there are different types of LED display screens on the market, for example, some LED display screens are completely matte black and can achieve diffuse reflection of light; some LED display screens are half-bright and can achieve partial mirror reflection; some LED display screens are fully bright and can achieve complete mirror reflection, etc., when detecting the ink color of the LED display screen, it is necessary to avoid the reflected image of the image acquisition device appearing in the image captured by the image acquisition device. Therefore, in the embodiments of the present application, for different types of LED display screens to be detected, image acquisition devices installed in different positions are used to capture images of the LED display screens to be detected.

[0040] In order to ensure the clarity of the image captured by the image acquisition device, in the embodiment of the present application, it is necessary to ensure that the distance between the lens of the image acquisition device and the LED display screen to be detected is greater than the minimum working distance of the lens of the image acquisition device. The angle of the lens of the image acquisition device can be adjusted according to the actual lens focal length of the image acquisition device and the camera target surface to ensure that the image captured by the image acquisition device is clear and the image of the LED display screen to be detected in the captured image is complete.

[0041] In the embodiment of the present application, any image acquisition device is respectively connected to the control module 101. When the control module 101 receives the detection instruction, it can obtain the target type of the LED display screen to be detected contained in the detection instruction, determine the target acquisition angle corresponding to the target type according to the correspondence between the type and the acquisition angle saved in advance, select the corresponding image acquisition device according to the target acquisition angle, control the image acquisition device corresponding to the target acquisition angle to acquire the image of the LED display screen to be detected, and after acquiring the image acquired by the image acquisition device of the target acquisition angle, the image can be converted into a LAB image. For example, if the image acquired by the image acquisition device is an RGB image, the RGB image can be converted into a LAB image based on the XYZ color space. The process of converting the image color mode belongs to the prior art and will not be repeated here.

[0042] After determining the LAB image corresponding to the image captured by the image acquisition device, since the L channel, A channel and B channel in the LAB image represent different image characteristics, in the embodiment of the present application, the ink color level of the LED display screen to be detected can be determined according to the pixel value of the preset channel in the LAB image and the threshold range corresponding to the preset channel. Specifically, any one of the L channel, A channel and B channel can be used as the preset channel.

[0043] In an embodiment of the present application, the difference between the maximum pixel value and the minimum pixel value of a preset channel in the LAB image can be obtained, and the ink color level of the LED display screen to be detected can be determined based on the difference and the threshold range corresponding to the preset channel.

[0044] In order to improve the efficiency of ink color detection, since the installation position of the image acquisition device 102 is fixed and the installation position of the LED display screen to be detected is also fixed, the actual area corresponding to each part of the captured image can be known in advance. Therefore, in the embodiment of the present application, the detection area of ​​the image can be pre-set. After determining the LAB image corresponding to the image captured by the image acquisition device 102, the pixel value of each pixel point in the detection area is obtained, and the ink color level of the LED display screen to be detected is determined according to the pixel value of the preset channel in the preset area and the threshold range corresponding to the preset channel.

[0045] Because in the embodiment of the present application, the control module of the ink color detection device determines which preset angle of the image acquisition device 102 to use to capture the image of the LED display screen to be detected according to the different target types of the LED display screen to be detected, thereby ensuring that the mirror reflection image of the image acquisition device 102 does not appear in the image of the LED display screen to be detected captured by the image acquisition device 102, thereby improving the accuracy of ink color detection, and the control module 101 determines the LAB image corresponding to the image captured by the image acquisition device 102 through the image captured by the image acquisition device 102, and determines the ink color level of the LED display screen to be detected according to the pixel value of the preset channel in the LAB image and the threshold range corresponding to the preset channel, thereby improving the efficiency of ink color detection.

[0046] Embodiment 2:

[0047] In order to further improve the accuracy of ink color detection, based on the above embodiments, in the embodiment of the present application, the proportion of the LED display screen to be detected in the image captured by the image acquisition device 102 is less than a preset proportion threshold.

[0048] In order to obtain an image of the LED display screen to be detected, the image of the LED display screen to be detected may be captured by the image acquisition device 102 , and the ink color level of the LED display screen to be detected may be determined based on the image captured by the image acquisition device 102 .

[0049] Since the illumination at the edge of the lens of the image acquisition device 102 is lower than the illumination at the center, in order to ensure that the image of the LED display screen to be detected acquired by the image acquisition device 102 will not be affected by the illumination at the edge of the lens of the image acquisition device 102 being lower than the illumination at the center, a preset proportion threshold is saved in the embodiment of the present application to ensure that the proportion of the screen of the LED display screen to be detected acquired by the image acquisition device 102 is less than the preset proportion threshold. The preset proportion threshold is a value not greater than 1, such as 1 / 4, 3 / 5, 80% or 95%, etc.

[0050] Specifically, the distance between the lens of the image acquisition device 102 and the LED display screen to be detected can be adjusted according to the parameters such as the focal length of the lens of the image acquisition device 102 and the camera target surface. For example, the image acquisition device 102 is equipped with a 12mm lens and is 550mm away from the LED display screen to be detected, which can ensure that the proportion of the LED display screen to be detected in the image captured by the image acquisition device 102 is less than the preset proportion threshold.

[0051] Preferably, the preset ratio threshold can be set to 2 / 3, which can ensure that the image of the LED display screen to be detected captured by the image acquisition device 102 will not be affected by the illumination at the edge of the lens of the image acquisition device 102 being lower than the center illumination, and will not affect the accuracy of ink color detection because the image of the LED display screen to be detected in the image captured by the image acquisition device 102 is too small.

[0052] In the embodiment of the present application, the distance between the image acquisition device 102 and the lens of the image acquisition device 102 and the LED display screen to be detected is not limited, the focal length of the lens and the camera target surface are not limited, as long as the proportion of the LED display screen to be detected in the image captured by the image acquisition device 102 is less than 2 / 3 of the entire image, the brightness of the LED display screen to be detected captured by the image acquisition device 102 will not be affected by the illumination of the edge of the lens of the image acquisition device 102.

[0053] Embodiment 3:

[0054] In order to further improve the accuracy of ink color detection, based on the above embodiments, in the embodiment of the present application, the device also includes a shell 104 and a fill light 105, and the fill light 105 is fixed on the inner surface of the shell 104, and is used to fill light for the LED display screen to be detected; the display screen fixing component is fixed on the inner surface of the shell 104, and is arranged opposite to the fill light 105.

[0055] In order to further improve the accuracy of ink color detection and ensure that the LED display screen to be detected is not affected by ambient light during ink color detection, so that the LED display screen to be detected is in a dark environment, in the embodiment of the present application, the ink color detection device also includes a housing 104. Since the LED display screen to be detected is black in the off-screen mode, and the environment inside the closed housing is also black, in order to enable the image acquisition device to capture the image of the LED display screen to be detected, it is necessary to fill light for the LED display screen to be detected. In the embodiment of the present application, a fill light 105 is used to fill light for the LED display screen to be detected.

[0056] In the embodiment of the present application, the fill light 105 can be fixed on the inner surface of the shell 104. In order to ensure that after the LED display screen to be detected is illuminated by the fill light 105, all positions of the LED display screen are evenly illuminated, the display screen fixing component 103 can be fixed on the inner surface of the shell 104, arranged opposite to the fill light 105, and ensure that the display screen fixing component 103 is parallel to the fill light 105.

[0057] Figure 3a A schematic diagram of the installation position of the first image acquisition device and the fill light provided in the embodiment of the present application, such as Figure 3a As shown, in order to ensure that the fill light 105 can fill light for the LED display screen to be detected, the lens of the first image acquisition device 1021 is parallel to the LED display screen to be detected after installation, and can capture the image of the LED display screen to be detected. The fill light 105, the first image acquisition device 1021 and the display screen fixing component 103 can be installed in this order.

[0058] Figure 3b A schematic diagram of the installation positions of the second image acquisition device and the fill light provided in the embodiment of the present application. In order to ensure that the LED display screen to be inspected is evenly illuminated by the fill light 105, the fill light 105 and the display screen fixing component 103 are respectively fixed on surfaces parallel to each other in the shell 104, and the second image acquisition device 1022 is installed on the side of the display screen fixing component 103.

[0059] In order to further improve the accuracy of ink color detection, on the basis of the above embodiments, in the embodiment of the present application, the fill light 105 is a light homogenizer for fill light with white light.

[0060] In order to further improve the accuracy of ink color detection, after the LED display screen to be detected receives the fill light from the fill light 105, all positions of the LED display screen to be detected are evenly illuminated. In an embodiment of the present application, a white light fill light homogenizing plate can be used to evenly fill light for the LED display screen to be detected.

[0061] Specifically, in order to simulate the ink color difference of the LED display screen to be detected under strong light, in the embodiment of the present application, the fill light 105 can use a white light fill light homogenizing plate, and the color temperature range of the fill light 105 is 6600-7000K.

[0062] In order to ensure the uniformity of the overall illumination of the LED display screen to be inspected after being supplemented by the supplementary light 105, the illumination of the supplementary light 105 should be adjustable and the area of ​​the supplementary light 105 needs to be larger than the area of ​​the LED display screen to be inspected.

[0063] In the embodiment of the present application, the ink color level of the LED display screen to be detected is determined based on the image captured by the image acquisition device 102. Therefore, whether the LED display screen to be detected is evenly illuminated will affect the result of the ink color detection. In order to determine whether the LED display screen to be detected is evenly illuminated, it can be determined whether it is evenly illuminated based on whether the difference in illumination at the four corner edges is less than a preset illumination threshold.

[0064] Specifically, in the embodiment of the present application, after the LED display screen to be detected is supplemented by the supplementary light 105, the illuminance of the four corner edges of the LED display screen to be detected can be measured by using an illuminometer to ensure that the difference in illuminance of the four corner edges of the LED display screen to be detected is less than 5%. For the convenience of description, the maximum value of the illuminance of the four corner edges can be represented by A, and the minimum value of the illuminance of the four corner edges can be represented by B. The difference in illuminance of the four corner edges of the LED display screen to be detected is less than 5% and can be expressed as:

[0065] In order to further improve the accuracy of ink color detection, in the embodiment of the present application, the illumination should not be too high during the use of the fill light 105 to prevent the image captured by the image acquisition device from being overexposed. The white block of the 24 standard color card can be used to verify whether there is an overexposed area. If there is an overexposed area, the illumination needs to be reduced to prevent it from being overexposed. For example, the illumination range of the four corners of the LED display screen to be detected can be 180-220lux. The specific setting of the illumination of the fill light 105 is not limited in the embodiment of the present application. Those skilled in the art can adjust it according to the actual parameters of the fill light 105, as long as the image captured by the image acquisition device is not overexposed. After the illumination of the fill light 105 is determined, the illumination can be fixed, and the above process of determining the various parameters of the fill light 105 can be understood as the calibration process of the ink color detection device.

[0066] Embodiment 4:

[0067] In order to further improve the accuracy of ink color detection, on the basis of the above embodiments, in the embodiment of the present application, the control module 101, when the target type is an LED display screen with non-specular reflection characteristics, determines the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, selects the first image acquisition device 1021 according to the target acquisition angle, and sends an instruction to acquire an image to the first image acquisition device 1021.

[0068] In order to further improve the accuracy of ink color detection, after receiving the detection instruction, the control module 101 can obtain the target type of the LED display screen to be detected contained in the detection instruction, determine the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, and select the corresponding image acquisition device 102 according to the target acquisition angle.

[0069] For LED display screens with non-mirror reflection characteristics, obvious differences can be seen when observing this type of display screen from the front. In order to make the detection data more accurate and closer to the observation results of the human eye, in the embodiment of the present application, if the target type of the LED display screen to be detected is an LED display screen with non-mirror reflection characteristics, the first image acquisition device 1021 can be used to capture the image of the LED display screen to be detected. After determining the target acquisition angle corresponding to the target type of the LED display screen to be detected and selecting the first image acquisition device 1021 according to the target acquisition angle, the control module 101 can send an image acquisition instruction to the first image acquisition device 1021 to control the first image acquisition device 1021 to capture the image of the LED display screen to be detected.

[0070] Specifically, the target type of the LED display screen to be detected contained in the detection instruction may be the name of the target type, identification information, etc. If the target type of the LED display screen to be detected contained in the detection instruction is 01, the control module 101 may determine the image acquisition device 102 of the target acquisition angle corresponding to the target type 01 according to the pre-saved correspondence between the type and the acquisition angle, where 01 represents an LED display screen with non-mirror reflection characteristics. In the embodiment of the present application, the control module 101 may pre-save the correspondence between multiple groups of type identification information and acquisition angles. After obtaining the target type, the control module 101 may search for the identification information corresponding to the target type in the pre-saved correspondence, obtain the acquisition angle corresponding to the identification information, determine the image acquisition device 102 installed at the acquisition angle according to the acquisition angle, and notify the image acquisition device 102 to capture the image.

[0071] In order to further improve the accuracy of ink color detection, on the basis of the above embodiments, in the embodiment of the present application, the control module 101, when the target type is an LED display screen with mirror reflection characteristics, determines the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, selects the second image acquisition device 1022 according to the target acquisition angle, and sends an instruction to acquire an image to the second image acquisition device 1022.

[0072] In order to further improve the accuracy of ink color detection, after receiving the detection instruction, the control module 101 can obtain the target type of the LED display screen to be detected contained in the detection instruction, and determine the image acquisition device 102 of the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle.

[0073] For LED display screens with mirror reflection characteristics, such display screens are prone to reflection images when observed from the front, and in actual use, such display screens need to be observed from the side to see obvious ink color differences. Therefore, in order to improve the accuracy of ink color detection, in the embodiment of the present application, a more practical observation method is used. If the target type of the LED display screen to be detected is an LED display screen with mirror reflection characteristics, the second image acquisition device 1022 can be used to acquire an image of the LED display screen to be detected. After determining the target acquisition angle corresponding to the target type of the LED display screen to be detected and selecting the second image acquisition device 1022 according to the target acquisition angle, the control module 101 can send an image acquisition instruction to the second image acquisition device 1022 to control the second image acquisition device 1022 to acquire the image of the LED display screen to be detected.

[0074] Specifically, the target type of the LED display screen to be detected contained in the detection instruction may be the name of the target type, identification information, etc. If the target type of the LED display screen to be detected contained in the detection instruction is 02, the control module 101 may determine the image acquisition device 102 of the target acquisition angle corresponding to the target type 02 according to the pre-saved correspondence between the type and the acquisition angle, where 02 represents an LED display screen with a specular reflection feature. After obtaining the target type, the control module 101 may search for the identification information corresponding to the target type in the pre-saved correspondence, and obtain the acquisition angle corresponding to the found identification information, determine the image acquisition device 102 installed at the acquisition angle according to the acquisition angle, and notify the image acquisition device 102 to capture the image.

[0075] Embodiment 5:

[0076] In order to further improve the accuracy of ink color detection, on the basis of the above embodiments, in the embodiment of the present application, the control module 101 determines the pixel average value of the pixel points of the preset channel in the LAB image, and according to the average value and the threshold range of the preset channel corresponding to each preset ink color level, if the average value is within any threshold range of the preset channel, the ink color level corresponding to the threshold range is used as the ink color level of the LED display to be detected.

[0077] In order to accurately determine the ink color level of the LED display screen to be detected, after determining the LAB image corresponding to the image collected by the acquisition device 102, since the L channel in the LAB image represents the brightness of the image, the value range is [0,100]; the A channel represents the color from red to green, the value range is [127,-128]; the B channel represents the color from yellow to blue, the value range is [127,-128]. Therefore, in the embodiment of the present application, the ink color classification of the LED display screen to be detected can be determined according to the pixel value of each channel.

[0078] Specifically, the ink color level of the LED display screen to be detected can be determined according to the pixel value of the L channel, that is, the ink color level of the LED display screen to be detected can be determined according to the brightness of the LED display screen to be detected. Due to the current process problems in the production of LED display screens, the color of the LED display screen will have color deviations such as yellowish color. Therefore, in order to cover the ink color data of all processes, in the embodiment of the present application, the ink color level of the LED display screen to be detected can also be determined according to the pixel value of the A channel, that is, the ink color level of the LED display can be determined according to whether the LED display screen to be detected is reddish or greenish in black; the ink color level of the LED display screen to be detected can also be determined according to the pixel value of the B channel, that is, the ink color level of the LED display can be determined according to whether the LED display screen to be detected is yellowish or bluish in black.

[0079] Since the average value can reflect the general level of the whole, in the embodiment of the present application, the pixel average value of the pixel points of the preset channel in the LAB image can be calculated, and the ink color level of the LED display screen to be detected can be determined according to the average value and the threshold range of the preset channel corresponding to each preset ink color level. If the average value of the preset channel is within any threshold range of the preset channel, the ink color level corresponding to the threshold range can be used as the ink color level of the LED display screen to be detected.

[0080] Specifically, in the embodiment of the present application, if the preset channel is the L channel, the larger the pixel value of the L channel, the brighter the LED display screen to be detected, and the smaller the pixel value, the darker the LED display screen to be detected. Therefore, the ink level can be divided according to the value range of the L channel. The ink level can be an ink identification or a pre-set ink level name. Technical personnel in this field can determine how to divide the ink level according to the needs of ink detection. For example, the threshold range 1 is in the range of [0,24] and the corresponding ink level is level 1 ink, the threshold range 2 is in the range of [25,49] and the corresponding ink level is level 2 ink, the threshold range 3 is in the range of [50,74] and the corresponding ink level is level 3 ink, and the threshold range 4 is in the range of [75,100] and the corresponding ink level is level 4 ink, where level 1 ink to level 4 ink correspond to ink from light to dark.

[0081] If the average pixel value of the pixel points of the L channel in the determined LAB image is 58, it can be determined that the average value 58 is within the threshold range 3 of the L channel, and the ink level corresponding to the threshold range 3 is level 3 ink. Then the ink level corresponding to the threshold range can be used as the ink level of the LED display to be detected, that is, the ink level of the LED display to be detected is level 3 ink.

[0082] Embodiment 6:

[0083] In order to further improve the accuracy of ink color detection, based on the above embodiments, an ink color detection method is provided in the embodiment of the present application. Figure 4 A process diagram of an ink color detection method provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, the process includes the following steps:

[0084] S401: Receive a detection instruction, and obtain the target type of the LED display screen to be detected contained in the detection instruction.

[0085] S402: Determine a target acquisition angle corresponding to the target type according to a pre-saved correspondence between the type and the acquisition angle, and select a corresponding image acquisition device according to the target acquisition angle.

[0086] S403: Determine a LAB image corresponding to the image acquired by the image acquisition device, and determine the ink color level of the LED display screen to be detected according to the pixel value of a preset channel in the LAB image and the threshold range corresponding to the preset channel.

[0087] In a possible implementation, determining the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, and selecting the corresponding image acquisition device according to the target acquisition angle includes:

[0088] When the target type is an LED display screen with non-specular reflection characteristics, the target acquisition angle corresponding to the target type is determined according to the pre-saved correspondence between the type and the acquisition angle, and the corresponding image acquisition device is selected as the first image acquisition device according to the target acquisition angle, wherein the lens of the first image acquisition device is parallel to the LED display screen to be detected after installation.

[0089] In a possible implementation, determining the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, and selecting the corresponding image acquisition device according to the target acquisition angle includes:

[0090] When the target type is an LED display screen with mirror reflection characteristics, the target acquisition angle corresponding to the target type is determined according to the pre-saved correspondence between the type and the acquisition angle, and the corresponding image acquisition device is selected as the second image acquisition device according to the target acquisition angle, wherein the axis of the lens of the second image acquisition device is set at a preset angle with the LED display screen to be detected after installation.

[0091] In a possible implementation, determining the ink color level of the LED display screen to be detected according to the pixel value of the preset channel in the LAB image and the threshold range corresponding to the preset channel includes:

[0092] Determine the pixel average value of the pixel points of the preset channel in the LAB image, and based on the average value and the threshold range of the preset channel corresponding to each preset ink color level, if the average value is within any threshold range of the preset channel, the ink color level corresponding to the threshold range is used as the ink color level of the LED display to be detected.

[0093] Specifically, the method is applied to an ink color detection device. The specific implementation process is shown in the above embodiment and will not be described again here.

[0094] Embodiment 7:

[0095] Figure 5 A schematic diagram of the structure of an ink color detection device provided in an embodiment of the present application is shown in FIG. Figure 5 As shown, the device comprises:

[0096] An acquisition module 501 is used to receive a detection instruction and acquire a target type of the LED display screen to be detected contained in the detection instruction;

[0097] A determination module 502 is used to determine the target acquisition angle corresponding to the target type according to the pre-stored correspondence between the type and the acquisition angle, and select a corresponding image acquisition device according to the target acquisition angle;

[0098] The detection module 503 is used to determine the LAB image corresponding to the image captured by the image acquisition device, and determine the ink color level of the LED display screen to be detected according to the pixel value of the preset channel in the LAB image and the threshold range corresponding to the preset channel.

[0099] In a possible implementation, the determination module 502 is specifically used to determine the target acquisition angle corresponding to the target type according to a pre-saved correspondence between the type and the acquisition angle when the target type is an LED display screen with non-specular reflection characteristics, and select the corresponding image acquisition device as the first image acquisition device according to the target acquisition angle, wherein the lens of the first image acquisition device is parallel to the LED display screen to be detected after installation.

[0100] In a possible implementation, the determination module 502 is specifically used to determine, when the target type is an LED display screen with mirror reflection characteristics, a target acquisition angle corresponding to the target type according to a pre-saved correspondence between the type and the acquisition angle, and select a corresponding image acquisition device as a second image acquisition device according to the target acquisition angle, wherein the axis of the lens of the second image acquisition device is set at a preset angle with the LED display screen to be detected after installation.

[0101] In a possible implementation, the detection module 503 is specifically used to determine the pixel average value of the pixel points of the preset channel in the LAB image, based on the average value and the threshold range of the preset channel corresponding to each preset ink color level. If the average value is within any threshold range of the preset channel, the ink color level corresponding to the threshold range is used as the ink color level of the LED display to be detected.

[0102] Embodiment 8:

[0103] Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Based on the above embodiments, the present application further provides an electronic device, such as Figure 6 As shown, it includes: a processor 601, a communication interface 602, a memory 603 and a communication bus 604, wherein the processor 601, the communication interface 602, and the memory 603 communicate with each other through the communication bus 604;

[0104] The memory 603 stores a computer program. When the program is executed by the processor 601, the processor 601 performs the following steps:

[0105] Receive a detection instruction, and obtain the target type of the LED display screen to be detected contained in the detection instruction;

[0106] Determine the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, and select the corresponding image acquisition device according to the target acquisition angle;

[0107] Determine a LAB image corresponding to the image acquired by the image acquisition device, and determine the ink color level of the LED display screen to be detected according to the pixel value of a preset channel in the LAB image and the threshold range corresponding to the preset channel.

[0108] In a possible implementation, determining the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, and selecting the corresponding image acquisition device according to the target acquisition angle includes:

[0109] When the target type is an LED display screen with non-specular reflection characteristics, the target acquisition angle corresponding to the target type is determined according to the pre-saved correspondence between the type and the acquisition angle, and the corresponding image acquisition device is selected as the first image acquisition device according to the target acquisition angle, wherein the lens of the first image acquisition device is parallel to the LED display screen to be detected after installation.

[0110] In a possible implementation, determining the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, and selecting the corresponding image acquisition device according to the target acquisition angle includes:

[0111] When the target type is an LED display screen with mirror reflection characteristics, the target acquisition angle corresponding to the target type is determined according to the pre-saved correspondence between the type and the acquisition angle, and the corresponding image acquisition device is selected as the second image acquisition device according to the target acquisition angle, wherein the axis of the lens of the second image acquisition device is set at a preset angle with the LED display screen to be detected after installation.

[0112] In a possible implementation, determining the ink color level of the LED display screen to be detected according to the pixel value of the preset channel in the LAB image and the threshold range corresponding to the preset channel includes:

[0113] Determine the pixel average value of the pixel points of the preset channel in the LAB image, and based on the average value and the threshold range of the preset channel corresponding to each preset ink color level, if the average value is within any threshold range of the preset channel, the ink color level corresponding to the threshold range is used as the ink color level of the LED display to be detected.

[0114] Since the principle of solving the problem by the above electronic device is similar to that of the ink color detection method, the implementation of the above electronic device can refer to the above embodiment, and the repeated parts will not be repeated.

[0115] The communication bus mentioned in the above electronic device can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus. The communication interface 602 is used for communication between the above electronic device and other devices. The memory may include a random access memory (RAM) or a non-volatile memory (NVM), such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the aforementioned processor. The above processor may be a general-purpose processor, including a central processing unit, a network processor (NP), etc.; it may also be a digital signal processing processor (DSP), an application-specific integrated circuit, a field programmable gate array or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.

[0116] Embodiment 9:

[0117] On the basis of the above embodiments, the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program executable by a processor, and when the program runs on the processor, the processor implements the following steps when executing:

[0118] Receive a detection instruction, and obtain the target type of the LED display screen to be detected contained in the detection instruction;

[0119] Determine the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, and select the corresponding image acquisition device according to the target acquisition angle;

[0120] Determine a LAB image corresponding to the image acquired by the image acquisition device, and determine the ink color level of the LED display screen to be detected according to the pixel value of a preset channel in the LAB image and the threshold range corresponding to the preset channel.

[0121] In a possible implementation, determining the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, and selecting the corresponding image acquisition device according to the target acquisition angle includes:

[0122] When the target type is an LED display screen with non-specular reflection characteristics, the target acquisition angle corresponding to the target type is determined according to the pre-saved correspondence between the type and the acquisition angle, and the corresponding image acquisition device is selected as the first image acquisition device according to the target acquisition angle, wherein the lens of the first image acquisition device is parallel to the LED display screen to be detected after installation.

[0123] In a possible implementation, determining the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, and selecting the corresponding image acquisition device according to the target acquisition angle includes:

[0124] When the target type is an LED display screen with mirror reflection characteristics, the target acquisition angle corresponding to the target type is determined according to the pre-saved correspondence between the type and the acquisition angle, and the corresponding image acquisition device is selected as the second image acquisition device according to the target acquisition angle, wherein the axis of the lens of the second image acquisition device is set at a preset angle with the LED display screen to be detected after installation.

[0125] In a possible implementation, determining the ink color level of the LED display screen to be detected according to the pixel value of the preset channel in the LAB image and the threshold range corresponding to the preset channel includes:

[0126] Determine the pixel average value of the pixel points of the preset channel in the LAB image, and based on the average value and the threshold range of the preset channel corresponding to each preset ink color level, if the average value is within any threshold range of the preset channel, the ink color level corresponding to the threshold range is used as the ink color level of the LED display to be detected.

[0127] Since the principle of solving the problem by the computer-readable medium provided above is similar to that of the ink color detection method, after the processor executes the computer program in the computer-readable medium above, the steps implemented can refer to the above embodiment, and the repeated parts will not be repeated.

[0128] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0129] As for the system / device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0130] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0131] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0132] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0133] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0134] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. An ink color detection device, characterized in that: The device comprises a control module, at least two image acquisition devices and a display screen fixing component; the display screen fixing component is used to fix the LED display screen to be detected; the lens of at least one first image acquisition device is parallel to the LED display screen to be detected after installation; the axis of the lens of at least one second image acquisition device is set at a preset angle to the LED display screen to be detected after installation; The at least two image acquisition devices are respectively connected to the control module for acquiring images; The control module is used to receive a detection instruction, obtain a target type of an LED display screen to be detected contained in the detection instruction; wherein the target type is an LED display screen with non-mirror reflection characteristics or an LED display screen with mirror reflection characteristics; determine a target acquisition angle corresponding to the target type according to a pre-saved correspondence between the type and the acquisition angle, and select a corresponding image acquisition device according to the target acquisition angle; determine a LAB image corresponding to the image acquired by the image acquisition device, and determine the ink color level of the LED display screen to be detected according to a pixel value of a preset channel in the LAB image and a threshold range corresponding to the preset channel.

2. The device according to claim 1, characterized in that The proportion of the LED display screen to be detected in the image captured by the image acquisition device is less than a preset proportion threshold.

3. The device according to claim 1, characterized in that The device also includes a shell and a fill light, wherein the fill light is fixed on the inner surface of the shell and is used to fill light for the LED display screen to be detected; the display screen fixing component is fixed on the inner surface of the shell and is arranged opposite to the fill light.

4. The device according to claim 3, characterized in that The fill light is a light homogenizing plate for white light fill light.

5. The device according to claim 1, characterized in that When the target type is an LED display screen with non-specular reflection characteristics, the control module determines the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, selects the first image acquisition device according to the target acquisition angle, and sends an instruction to acquire an image to the first image acquisition device.

6. The device according to claim 3, characterized in that When the target type is an LED display screen with mirror reflection characteristics, the control module determines the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, selects the second image acquisition device according to the target acquisition angle, and sends an instruction to acquire an image to the second image acquisition device.

7. The device according to claim 1, characterized in that The control module determines the pixel average value of the pixel points of the preset channel in the LAB image, and based on the average value and the threshold range of the preset channel corresponding to each preset ink color level, if the average value is within any threshold range of the preset channel, the ink color level corresponding to the threshold range is used as the ink color level of the LED display to be detected.

8. A method for detecting ink color, characterized in that: The method comprises: Receive a detection instruction, and obtain a target type of the LED display screen to be detected contained in the detection instruction; wherein the target type is an LED display screen with non-mirror reflection characteristics or an LED display screen with mirror reflection characteristics; Determine the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, and select the corresponding image acquisition device according to the target acquisition angle; Determine a LAB image corresponding to the image acquired by the image acquisition device, and determine the ink color level of the LED display screen to be detected according to the pixel value of a preset channel in the LAB image and the threshold range corresponding to the preset channel.

9. The method according to claim 8, characterized in that The step of determining a target acquisition angle corresponding to the target type according to a pre-stored correspondence between the type and the acquisition angle, and selecting a corresponding image acquisition device according to the target acquisition angle comprises: When the target type is an LED display screen with non-specular reflection characteristics, the target acquisition angle corresponding to the target type is determined according to the pre-saved correspondence between the type and the acquisition angle, and the corresponding image acquisition device is selected as the first image acquisition device according to the target acquisition angle, wherein the lens of the first image acquisition device is parallel to the LED display screen to be detected after installation.

10. The method according to claim 8, characterized in that The step of determining a target acquisition angle corresponding to the target type according to a pre-stored correspondence between the type and the acquisition angle, and selecting a corresponding image acquisition device according to the target acquisition angle comprises: When the target type is an LED display screen with mirror reflection characteristics, the target acquisition angle corresponding to the target type is determined according to the pre-saved correspondence between the type and the acquisition angle, and the corresponding image acquisition device is selected as the second image acquisition device according to the target acquisition angle, wherein the axis of the lens of the second image acquisition device is set at a preset angle with the LED display screen to be detected after installation.

11. The method according to claim 8, characterized in that Determining the ink color level of the LED display screen to be detected according to the pixel value of the preset channel in the LAB image and the threshold range corresponding to the preset channel includes: Determine the pixel average value of the pixel points of the preset channel in the LAB image, and based on the average value and the threshold range of the preset channel corresponding to each preset ink color level, if the average value is within any threshold range of the preset channel, the ink color level corresponding to the threshold range is used as the ink color level of the LED display to be detected.

12. An ink color detection device, characterized in that: The device comprises: An acquisition module, used for receiving a detection instruction, and acquiring a target type of an LED display screen to be detected contained in the detection instruction; wherein the target type is an LED display screen with non-mirror reflection characteristics or an LED display screen with mirror reflection characteristics; A determination module, used to determine the target acquisition angle corresponding to the target type according to the pre-saved correspondence between the type and the acquisition angle, and select the corresponding image acquisition device according to the target acquisition angle; The detection module is used to determine the LAB image corresponding to the image captured by the image acquisition device, and determine the ink color level of the LED display screen to be detected according to the pixel value of the preset channel in the LAB image and the threshold range corresponding to the preset channel.

13. An electronic device, characterized in that: The electronic device comprises at least a processor and a memory, and the processor is used to implement the steps of the ink color detection method described in any one of claims 8 to 11 when executing a computer program stored in the memory.

14. A computer-readable storage medium, characterized in that: It stores a computer program, which, when executed by a processor, implements the steps of the ink color detection method described in any one of claims 8 to 11.

Images