Patent ID: 8285025
Filing Date: 2012-10-09
Classification: G01B,G01N,G06T

Abstract:
1. An improved method for classifying defects in an article, including projecting light patterns onto said article, acquiring images of said projected pattern, transmitting said images to a computer, and processing said images with said computer, the improvement comprising: projecting a first light pattern onto said article from a first direction; acquiring a first image of said first light pattern with an image sensor; transmitting said first image from said sensor to said computer; projecting a second light pattern onto said article from a second direction; acquiring a second image of said second pattern with an image sensor; transmitting said second image from said image sensor to said computer; and processing said first and second images with said computer to detect differences between the images and thereby classify defects in the article, wherein acquiring the first image includes acquiring an image of the first light pattern projected onto the article and reflected by the article along a third direction relative to a location on the article, wherein acquiring the second image includes acquiring an image of the second light pattern projected onto the article and reflected by the article along a fourth direction relative to the location on the article, and wherein the third direction is different from the fourth direction.