Image analysis device and method

摘要

An image analysis device reads a reference image and a real-time image of a printed circuit board (PCB), determines feature points and feature information of the feature points in the reference image; and creates two 1×N matrices based on the feature points. Furthermore, a mapping matrix is determined based on the two 1×N matrices. The device then reads coordinates of base points designated in the reference image, and determines matching points in the real-time image based on the coordinates of base points and the mapping matrix. A reference region in the reference image is determined based on all the base points, and a matching region is determined in the real-time image based on all the matching points. The reference region and the matching region are compared to determine existence of any surface feature defects of the PCB.