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Image comparison method and system for vehicle information system test bench

An on-board information system and test bench technology, which is applied in the field of special image comparison systems for on-board information system test benches, can solve the problems of high cost of image recognition software, large external light interference factors, and different results, and achieves high savings. The effect of reducing the development cost, reducing the labor intensity and the probability of misjudgment

Active Publication Date: 2018-05-22
SAIC VOLKSWAGEN AUTOMOTIVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Manual visual comparison of images increases labor intensity, and it is impossible to compare each pixel one by one. Moreover, due to the chromatic aberration of the human eye itself, the results of different testers are different
[0006] 2. Use a high-precision industrial camera to compare photos of the display screen. The optical distortion of the photo increases the difficulty of image recognition. The cost of image recognition software is expensive, and it is sensitive to the brightness of the test environment and the color difference of the display screen itself, which is easy to cause Misjudgment
[0007] 3. The interference factors of external light are relatively large

Method used

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  • Image comparison method and system for vehicle information system test bench
  • Image comparison method and system for vehicle information system test bench
  • Image comparison method and system for vehicle information system test bench

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no. 1 example

[0047] figure 1 It shows the flow of the first embodiment of the image comparison method of the vehicle information system test bench of the present invention. See figure 1 , the detailed steps of the method of this embodiment are described in detail as follows.

[0048] Step S11: Receive the video signal from the navigation host of the vehicle information system.

[0049] Step S12: Analyzing the RGB values ​​of the image of the video signal to obtain an R-value matrix, a G-value matrix, and a B-value matrix. Analyze each pixel in the image of the video signal.

[0050] Step S13: Differentiate the analyzed R-value matrix, G-value matrix and B-value matrix from the R-value matrix, G-value matrix and B-value matrix of the design drawing, and compare the difference with the set threshold.

[0051] Step S14: Display the comparison result between the image of the video signal and the design drawing based on the comparison result of the threshold.

[0052] During the comparison...

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Abstract

The invention discloses a vehicle-mounted information system test table image comparison method and system which can provide a high-precision image comparison function and reduces misjudgment probability. The technical scheme lies in that a video signal of a display screen is obtained through a video signal splitter, pixel points of a video signal image are directly compared with pixel points of an original design image one by one (differences between corresponding RGB values are calculated), and difference threshold values and differential point color display are set through software, so that image comparison is effectively completed and differential points are displayed intuitively.

Description

technical field [0001] The invention relates to a vehicle information system image testing technology, in particular to a special image comparison system and method for a vehicle information system test bench. Background technique [0002] At present, in order to cooperate with the new models launched by automobile manufacturers and meet the needs of users, the in-vehicle information system is gradually developing towards multi-function and high integration. The resolution of the display screen image is getting higher and higher, the man-machine interface is rich and varied, and the image color is getting richer and richer, which makes it more and more difficult to test the correctness of the image display. [0003] The currently known test method is to use a high-precision camera to take images of the display screen, and then perform image recognition through expensive and complex algorithms to achieve the purpose of comparison testing. [0004] Disadvantages of the existi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N17/00H04N17/02
CPCH04N17/002H04N17/02
Inventor 张乐敏朱丽敏陈朝军邹广楠
Owner SAIC VOLKSWAGEN AUTOMOTIVE CO LTD