A method and a device for screen location in visual inspection

A visual inspection and screen technology, applied in image data processing, instruments, calculations, etc., can solve problems affecting the positioning accuracy of LCD screens and large positioning point errors

Inactive Publication Date: 2016-12-14
GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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  • Abstract
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Problems solved by technology

Specific as figure 1 As shown, the TV or monitor flows into the darkroom along the assembly line, and enters the field of view of the camera. The camera takes multiple partial pictures of the whole machine, and comprehensively obtains the positioning information of the front of the whole machine; since the pictures are taken in the darkroom, especially When shooting a larger size (for example, above 32 inches) LCD screen, the obtained picture usually has a large area of ​​vignetting, and the positioning point error obtained from this is relatively large, which affects the positioning accuracy of the LCD screen

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  • A method and a device for screen location in visual inspection

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[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0022] figure 2 It is a schematic flowchart of a method for screen positioning in visual inspection of an embodiment; as figure 2 As shown, the method for screen positioning in visual inspection in this embodiment includes steps:

[0023] S11, acquiring the whole machine RGB image of the device to be detected, and converting the whole machine RGB image into an HSV image;

[0024] As a preferred implementation manner, in the embodiment of the present invention, a color area array camera is used for image capture. The device to be detected is set to display a state of a solid color picture: red,...

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Abstract

The invention relates to a method and a device for screen location in visual inspection. The method comprises the steps of obtaining a complete machine RGB image of a to-be-inspected apparatus; converting the complete machine RGB image into an HSV image; extracting the V domain image information in the HSV image and performing binarization processing on the V domain image information to obtain a corresponding binarization image; processing the obtained binarization image by using a preset contour extracting function to obtain a contour set; acquiring the contour with the maximum area in the contour set as the screen contour of the to-be-inspected apparatus and locating the screen of the to-be-inspected apparatus according to the screen contour. The method and the device can realize online inspection, requires no line stop or departure from a line, thereby improving the inspection efficiency of visual inspection of apparatuses.

Description

technical field [0001] The invention relates to the technical field of online detection, in particular to a method and device for screen positioning in visual detection. Background technique [0002] On the TV or monitor production line, it is necessary to perform visual inspection on the front of the whole machine (LCD screen, LOGO and power indicator light) when the power is on, and sound and light alarms for defective TVs or monitors, prompting and waiting for workers to deal with . Usually, in order to avoid the interference of external light, the detection of LCD screen will be carried out in a dark room. The key step of visual inspection is the positioning of the TV or monitor, which is also equivalent to the positioning of the LCD screen of the TV or monitor. [0003] In order to realize this kind of visual detection, the existing method is to determine the position of the LCD screen by taking pictures of the whole machine. Specific as figure 1 As shown, the TV or...

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Application Information

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IPC IPC(8): G06T7/00G06T7/40
CPCG06T7/0004G06T2207/30108
Inventor 邱伟波
Owner GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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