Removing artifacts from document images

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United States of America Patent

PATENT NO 9852498
SERIAL NO

15139163

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Abstract

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Techniques for removing artifacts, such as shadows, from document images are described. A shadow map is generated for a digital image by first determining local background colors using clusters of local pixel intensities. Then, a global reference background color is selected from all pixel intensities of the digital image. Next, a per-pixel scaling factor is determined that maps the local background colors to the global reference background color, which applies localized adjustment to the digital image to remove local shadow.

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Patent Owner(s)

  • ADOBE SYSTEMS INCORPORATED

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bako, Steve Christopher Goleta, US 1 5
Darabi, Aliakbar Seattle, US 31 205
Shechtman, Elya Seattle, US 161 1062
Sunkavalli, Kalyan K San Jose, US 22 215
Wang, Jue Kenmore, US 281 3722

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