Image analysis – Image enhancement or restoration – Intensity – brightness – contrast – or shading correction
Patent
1998-04-21
2000-11-07
Rogers, Scott
Image analysis
Image enhancement or restoration
Intensity, brightness, contrast, or shading correction
382156, 358461, G06T 500, G06T 140, H04T 140
Patent
active
061447765
ABSTRACT:
An image reader having a shading correction function includes a scanner for scanning an original, a converter for converting the received light from the original into electric signals and outputting the electric signal as data of an read image, and a corrector for carrying out a shading correction operation on the data of the read image on the basis of a shading correction value and outputting corrected image data. The corrector computes shading correction values for the whole reading face of the original platen from the shading correction value at an arbitrary position on the reading face and carries out the shading correction operation on the data of the read image on the basis of the computed shading correction values.
REFERENCES:
patent: 5778279 (1998-12-01), Kawai et al.
patent: 5828781 (1998-10-01), Nakano
patent: 5929906 (1999-07-01), Arai et al.
Daidoh Takahiro
Goto Makio
Conlin David G.
Rogers Scott
Sharp Kabushiki Kaisha
Tucker David A.
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