Patent ID: 9582874
Date: 2017-02-28
CPC Classifications: G06T

Claim:
1. A method of detection of faults on circuit boards comprising the steps of: capturing an image of each of a plurality of circuit boards; dividing each of the captured images into a plurality of image segments; defining an image characteristic value for each image segment; selecting one of the circuit boards for testing; comparing each image segment from the selected circuit board with corresponding image segments of each other circuit board and defining for each image segment a plurality of differential image characteristic values, each being the difference between the image characteristic value of the image segment of the selected circuit board and the image characteristic value of one of the other circuit boards; ranking sortie or all of the differential image characteristic values for each image segment from lowest to highest; selecting an n creating a map from the selected differential image characteristic values providing, information about locations on the circuit board where faults may exist.