Image scanning apparatus and shading correction method

Details Image scanning apparatus and shading correction method Image scanning apparatus and shading correction method

2011-06-14

2011-06-14

Rogers, Scott A (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Specific to image source

C358S003260, C358S461000, C358S474000

Reexamination Certificate

active

07961348

ABSTRACT:
The present invention provides a technique that makes it possible to realize highly accurate shading correction regardless of presence of dust or the like in a shading correction plate without preventing a reduction in a size of an apparatus. An image scanning apparatus determines an area where dust is present in a reference area, which is an object of scanning of reference data used for shading correction in the image scanning apparatus, scans the reference data from an area excluding the area where it is determined that dust is present, and performs shading correction on the basis of the reference data scanned from the area excluding the area where it is determined that dust is present.

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