Automatic detection method for printing defects of automobile instrument panel
A technology of automobile dashboard and automatic detection, which is applied in instruments, image data processing, computing, etc., to reduce production costs, improve work efficiency, and avoid false detection and missed detection.
Active Publication Date: 2020-05-08
NANJING INST OF TECH
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[0004]
The purpose of the present invention is to provide an automatic detection method for the printing defects on the surface of the automobile instrument panel. The computer is used to automatically detect the printing quality of the automobile instrument panel, which can effectively overcome the defects of traditional manual detection, and not only ensure the printing quality of the instrument panel, but also Improve work efficiency and reduce production costs
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[0049] Below in conjunction with accompanying drawing, technical scheme of the present invention is described:
[0050] Such as figure 1 As shown, an automatic detection method for printing defects on the surface of an automobile instrument panel includes the following steps:
[0051] 1) Input the dashboard image, and preprocess the dashboard image to remove noise interference;
[0052] The input instrument panel image is manually cut, and multiple small icons that belong to the same printed icon / symbol but are not connected are cut out as a whole and made into a template; at the same time, the contour detection method is used to obtain the simple area connected at the edge Icon / symbol template.
[0053] 2) Obtain the complex printed icon / symbol template at the center of the dashboard image;
[0054] 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;
[0055] Th...
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The invention discloses an automatic detection method for printing defects of an automobile instrument panel, and relates to the technical field of automatic image processing. The method comprises thefollowing steps: preprocessing an instrument panel image to remove noise interference; obtaining a complex printing icon / symbol template at the center of the instrument panel image; removing the matched complex printing icon / symbol at the center from the instrument panel image; acquiring an area in the circle of the instrument panel; obtaining a connected domain of an area in the circle of the instrument panel; judging whether the connected domain is a printed icon connected domain or not; judging whether printing burrs exist or not; judging whether printing ghosting exists or not; and marking printing flaws in the image by using the detected background printing foreign matters, the detected target area burrs and the detected target area ghosting. The method is automatically completed through a computer, so that the detection precision is improved, the detection time is shortened, and the printing quality detection automation of the automobile instrument panel is realized. False detection and missing detection caused by human eye detection are effectively avoided, the working efficiency is improved, and the production cost is reduced.
Description
technical field [0001] The invention relates to the technical field of an automatic detection method for printing defects on automobile dashboards. 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] The printing defect of the car dashboard may exist in the printing foreign matter in the non-target area (background); it may also exist in the printing burr or printing ghost in the target area. At present, my country's automobile industry generally uses manual methods to detect the printing quality of instrument panels. This method is great...
Claims
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IPC IPC(8): G06T7/00G06T7/30
CPCG06T7/0004G06T7/30G06T2207/30268Y02P90/30
Inventor 童莹赵曼雪曹雪虹
Owner NANJING INST OF TECH