AOI image scanning detection processing method

Abstract

The invention relates to an AOI image scanning detection processing method. The method includes the following steps that: 1, an AOI device is provided with a CCD camera and performs line-by-line scanning on a detected circuit board through the CCD camera, so that a panoramic picture of the circuit board can be obtained; 2, the panoramic picture is subjected to vertical projection, so that the left shade, right shade and adhesion of a component can be eliminated; 3, the panoramic picture is subjected to horizontal projection, so that the front shade, back shade and adhesion of the component can be eliminated; 4, the panoramic picture is converted into a black-and-white picture through adopting a gray-scale critical value; and 5, binaryzation processing is performed on the black-and-white picture. According to the AOI image scanning detection processing method of the invention, shade and adhesion removal processing is performed on the picture before the picture is converted into the gray-scale picture, so that interferences and errors due to shades can be eliminated for the black-and-white picture after gray-scale conversion, and defect detection capability can be improved.

Description

Technical field [0001] The present invention involves a printing line board AOI detection technology, especially for a image scanning processing method. Background technique [0002] The full name of AOI (AutomaticOpticinspection) is automatic optical detection, which is a device that is based on the common defects encountered in welding production based on the principle of optical principles.AOI is a new type of test technology, but it has developed rapidly. Many manufacturers have launched AOI test equipment.When automatic detection, the machine automatically scan PCB through the camera, collect images, and compare the solder joints with the qualified parameters in the database. After the image processing, the defects on the PCB are detected.Come out for maintenance personnel for repair. [0003] At present, most of the AOI devices have only one positioning CCD camera. The shot graphics will have the shadow of some components, and even the shadow adhesion of adjacent components...

AI Technical Summary

Problems solved by technology

[0003]At present, most of the AOI equipment has only one positioned CCD camera, and the captured graphics will have part of the shadow of the component due to the height of the component, and even the shadow of the adjacent component Shadow sticking, which ultimately affects the defect comparison of the grayscale image