Patent ID: 7463765

Claim:
A method of inspecting a copy for defects of interest, comprising the steps of: a) providing an image signal containing a region of interest of the copy; b) transforming said image signal by a plurality of transform functions so as to obtain a plurality of conditioned image signals; c) extracting a plurality of residual defect signals using said plurality of conditioned image signals to determine the presence of defects of interest, wherein each residual defect signal of said plurality of residual defect signals corresponds to a respective one of said plurality of conditioned image signals; and d) performing a rule-based analysis on said plurality of residual defect signals; wherein: step c) includes: e) providing a data signal containing said region of interest of a standard; and f) extracting each residual defect signal of said plurality of residual defect signals using a corresponding one of said plurality of first conditioned images and said data signal; and step f) includes: g) transforms said signal by said plurality of transform functions so as to obtain a plurality of conditioned data signal; and h) extracting said residual defect signal of said plurality of detect signals using corresponding respective ones of said plurality of conditioned data signals and said plurality of conditioned image signals.