Patent ID: 8094923

Claim:
A wafer cassette inspection system having an imaging device set facing a front open surface of a wafer cassette set on a table so that a field-of-view range includes an inspected portion of the inside of the wafer cassette, capturing said field-of-view range, and outputting an image signal and a processing unit processing an image signal from said imaging device, said processing unit having a reference image generating means for generating reference image information based on an image signal output by said imaging device capturing a reference member having a predetermined shape and set with a predetermined layout relationship to said inspected portion in said field-of-view range, an inspected image information generating means for generating inspected image information based on an image signal output by said imaging device capturing an inspected portion inside the wafer cassette, an image correcting means for applying processing for obtaining a predetermined planar image of said reference member from said reference image information to said inspected image information to generate corrected image information, and a means for generating the appearance attribute information showing an appearance attribute of said inspected portion based on said corrected image information.