Patent Document ID: 5566245
Application ID: 08451759
Patent Status: 1

Claim One:
1. A method for characterizing the performance of a device, comprising the following steps: (a) providing a printed symbol, said printed symbol having been generated with a printer, said printed symbol comprising an array of printed polygons; (b) generating a pixel image of said printed symbol with camera; (c) locating an imaged symbol in said image using a computer processor, wherein the imaged symbol comprises an array of imaged polygons; (d) transforming at least a portion of said imaged symbol into a frequency domain using the computer processor; (e) calculating a quality measure in accordance with said transformed portion using the computer processor, wherein the quality measure indicates periodic differences between the imaged polygons and an array of specified polygons; and (f) characterizing the performance of said device in accordance with said quality measure, wherein said device is one of said printer and said camera.