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Image corner extraction method and device and image corner extraction camera

A corner point extraction and image technology, which is applied in image analysis, image data processing, character and pattern recognition, etc., can solve the problems of large amount of calculation for accurate extraction, large amount of image data, and small amount of calculation, so as to speed up calculation, The effect of saving FPGA resources and reducing system power consumption

Active Publication Date: 2019-04-02
WUHAN JINGCE ELECTRONICS GRP CO LTD
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Problems solved by technology

Generally, the pre-extraction algorithm is relatively simple and has a small amount of calculation, while the precise extraction has a large amount of calculation. Pre-extraction is combined with precise extraction to reduce the overall calculation amount. However, due to the serial execution of the CPU and the large amount of image data, this method takes a long time.

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  • Image corner extraction method and device and image corner extraction camera
  • Image corner extraction method and device and image corner extraction camera

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0027] like figure 1 As shown, the image corner extraction device of this embodiment includes an image area acquisition module and an accurate corner point extraction module, which are implemented inside the FPGA. The image corner extraction device is connected with the upper layer software through a data bus and a control bus. The data bus is used to transmit the rectangular area parameters and corner point extraction configuration parameters delivered by the upper layer software to the image corner point extraction device, and for the image area acquisition module to acquire image area data from the image cache. The control bus is used to issue the startup command of the upper layer software, and feedback the completion interrupt of the image corner point extraction device. An image area acquisition module and a corner point precise extracti...

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Abstract

The invention relates to the technical field of automatic optical detection of TFT-LCD panels, in particular to an image corner point extraction method and device, and an image corner point extraction camera device. The upper layer software sends the parameters of the rectangular area where the corner points are located to the image area acquisition module, and sends the corner point extraction configuration parameters to the corner point accurate extraction module; the image area acquisition module obtains the sub image, and send the obtained sub-image to the precise corner point extraction module; the precise corner point extraction module performs precise corner point extraction on the sub-image according to the received corner point extraction configuration parameters. The entire corner point extraction process is based on the FPGA, and the area where the corner points are located is obtained according to the prior conditions. It only needs to extract the sub-images within the rectangular area range, and does not need to traverse the entire image, and only the sub-images after traversal are accurate. processing, improving efficiency and saving resources.

Description

technical field [0001] The invention relates to the technical field of automatic optical detection of TFT-LCD panels, in particular to an image corner point extraction method and device, and an image corner point extraction camera device. Background technique [0002] In the process of automatic optical inspection of TFT-LCD (Thin film transistor Liquid crystal display LCD, thin film transistor liquid crystal display) panel, it is first necessary to perform geometric correction on the target image acquired by the industrial camera. In the geometric correction of the image, it is necessary to extract the target image The four corner points of are used to calculate the geometric correction parameters. Because on the one hand: the TFT-LCD panel automatic optical inspection system needs to process multiple large-size images in real time; on the other hand: the algorithm of automatic optical inspection is complex and the amount of calculation is large. Therefore, improving the d...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/46G06T7/00
CPCG06V10/44
Inventor 梅林海欧昌东汪舟简平超董文忠
Owner WUHAN JINGCE ELECTRONICS GRP CO LTD
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