Printed circuit board image detection method and device

Abstract

A printed circuit board image detection method and device of the present application. Including obtaining the image information to be detected; determining the contour pixels of the image information to be detected according to the image information to be detected, the contour being the inner contour formed by the hole to be detected on the image information to be detected; determining the corresponding contour pixels of each contour pixel according to the contour pixels Sub-pixel position; determine the sub-pixel position according to the pixel precision level, contour pixels, pixel values ​​of contour pixels, gradient pixels, and gradient pixels; send sub-pixel position and image information to be detected to the image judgment module, so that the image judgment module Detection is carried out according to the image to be detected of the printed circuit board to be detected. In the present application, the contour pixels of the image information to be detected are obtained, and the corresponding sub-pixel positions are determined according to the contour pixels. Therefore, the detection is performed according to the position of the sub-pixel, so as to improve the detection accuracy of the detection device without improving the hardware device.

Description

technical field [0001] The present application relates to the technical field of printed circuit boards, in particular to a method and device for detecting images of printed circuit boards. Background technique [0002] In recent years, with the rapid development of the integrated circuit industry, printed circuit board (Printed Circuit Board, PCB) products continue to develop rapidly in the direction of ultra-thin, small components, and high density. As the assembly density of components on the PCB increases, the line width, spacing, and pads of the PCB become smaller and smaller, and the number of composite layers increases. The technical level and complexity of PCB production have reached a fairly high level. [0003] Punching holes on PCB products is a conventional process in PCB production. Holes on PCB products are generally processed by CNC machine tools (Computer numerical control, CNC). With the miniaturization, ultra-thinning and high density of PCB products, the...

AI Technical Summary

Problems solved by technology

[0006] However, with the improvement of image detection requirements, the existing pixel-level edge detection methods can no longer meet the increasingly high detection requirements.

If the method of improving the image resolution is used to improve the detection ability, the existing hardware equipment needs to be replaced, which will lead to an increase in the detection cost

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