Image analysis – Image enhancement or restoration – Artifact removal or suppression
Reexamination Certificate
2004-08-18
2009-10-06
Chen, Wenpeng (Department: 2624)
Image analysis
Image enhancement or restoration
Artifact removal or suppression
C382S141000
Reexamination Certificate
active
07599576
ABSTRACT:
A method of removing an artifact resulting from an in-line illumination device of an imaging system from an object image. It includes obtaining a first image of the artifact using a first artifact illumination level and imaging the object using the imaging system wherein the illumination device is using an object illumination level. An artifact image is independent of the object and has pixel values related to the illumination level. Thus, the artifact can be removed by subtracting respective pixel values of an artifact image from respective values of the object image on a pixel address-by-pixel address basis. Various illumination levels can be used to create more than one artifact image. The artifact image for the subtraction can be one of the images taken or can be a scaled image where an artifact image is scaled to the object illumination level.
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Chen Wenpeng
Electro Scientific Industries Inc.
Yeh Eueng-Nan
Young & Basile
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