An automatic detection method for scratches on the surface of automobile instrument panel
A technology for automobile dashboard and automatic detection, which is applied in instruments, image analysis, image enhancement, etc., to avoid false detection and missed detection, improve work efficiency, and reduce production costs.
Active Publication Date: 2022-04-12
NANJING INST OF TECH
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[0004] The purpose of the present invention is to provide an automatic detection method for the scratches on the surface of the automobile instrument panel, which can effectively overcome the defects of traditional manual detection by using a computer to automatically detect the scratches on the automobile instrument panel, which not only ensures the printing quality of the instrument panel, but also Improve work efficiency and reduce production costs
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[0043] Below in conjunction with accompanying drawing, technical scheme of the present invention is described:
[0044] like figure 1 As shown, an automatic detection method for scratches on the surface of an automobile instrument panel, comprising the following steps:
[0045] 1) Input the dashboard image, and preprocess the dashboard image to remove noise interference;
[0046] 2) Obtain the complex printed icon / symbol template at the center of the dashboard image;
[0047] 3) Use the template matching method to match the printed icon / symbol template, and remove the matched center complex printed icon / symbol from the dashboard image;
[0048] The specific implementation of the template matching method is as follows:
[0049] Slide on the original image as shown in Figure 2 such as image 3 The template image of , moves one pixel each time in the order from left to right and from top to bottom. At each position, use the following formula to calculate the matching metric ...
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The invention relates to an automatic detection method for scratches on the surface of an automobile instrument panel, which relates to the technical field of image automatic detection methods. The present invention includes the following steps: 1) inputting the image of the instrument panel, and preprocessing the image of the instrument panel to remove noise interference; 2) obtaining the complex printed icon / symbol template at the center of the instrument panel image; 3) matching the printed icon / symbol template ;4) Use the contour detection method to obtain the inner area of the dashboard circle; 5) Use the contour detection method to obtain the connected domain of the inner area of the dashboard circle; 6) Determine whether there is a scratch in the connected domain of the printed icon; 7) The detected center Complex typographical icon / symbol scratches, background scratches, simple typographical icon / symbol scratches at the edges are identified in the image. Realized the use of computer to automatically detect scratches on automobile dashboards, which can effectively overcome the defects of traditional manual detection, not only ensure the printing quality of dashboards, but also improve work efficiency and reduce production costs.
Description
technical field [0001] The invention relates to the technical field of an automatic detection method for scratches on the surface of an automobile instrument panel. Background technique [0002] In recent years, the automobile industry has developed rapidly. In 2018 alone, my country's automobile sales exceeded 28 million, ranking first in the world for 10 consecutive years. As an indispensable guarantee for safe driving, the instrument panel is a very important auto part. The correctness and clarity of the printing of various warning symbols and icons on the panel is an important prerequisite for the quality and safety of automotive products. [0003] Scratches on car dashboards can be in the target area or in the background area, where the scratches can be on complex printed icons / symbols in the center, or simple printed icons / symbols at the edges. At present, my country's automobile industry generally uses manual methods to detect the printing quality of instrument panel...
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IPC IPC(8): G06T7/00G06T7/11G06T7/187G06V20/62G06V10/26G06V30/148G06V10/75G06K9/62
CPCG06T7/001G06T7/11G06T7/187G06T2207/10004G06T2207/30108G06V20/62G06V30/153G06V10/267G06V10/751G06V2201/02G06V30/10
Inventor 童莹赵曼雪曹雪虹
Owner NANJING INST OF TECH