Patent ID: 7088442
Filing Date: 2006-08-08
Classification: G01B,G01M,G01N,G06T

Abstract:
1. An apparatus for quality testing a body having a surface comprising a structure bounded by eases and a substantially edge-tree unevenness, wherein the structure does not constitute a quality impairment, and wherein the unevenness constitutes a potential quality impairment, comprising: a generator for generating a height representation of the surface, wherein the height representation of the surface includes the structure and the unevenness; a calculator for calculating a variation representation from the height representation, wherein the variation representation includes variations of a height representation, so that at a boundary of the structure a high variation is obtained, wherein at a boundary of the unevenness a low variation is obtained; and a detector for detecting regions of the height representation comprising a variation whose magnitude is smaller than a predetermined variation threshold value, wherein the variation threshold value is lower than the high variation and greater than the low variation, so that potentially quality-affecting regions are obtained.