Image analysis – Image enhancement or restoration – Intensity – brightness – contrast – or shading correction
Reexamination Certificate
2007-12-04
2007-12-04
Mehta, Bhavesh M (Department: 2624)
Image analysis
Image enhancement or restoration
Intensity, brightness, contrast, or shading correction
C382S254000
Reexamination Certificate
active
10813691
ABSTRACT:
A gradient domain compression system generates, from an input image having a high luminance dynamic range, an output image having a lower luminance dynamic range. The system comprises a gradient image generator module, a gradient compression module, and an output image generator module. The gradient image generator module is configured to generate, from the input image, a gradient image representing, for respective points of the input image, gradient values in the luminance of the input image. The gradient compression module is configured to receive the gradient image and generate a compressed range gradient image in which the range of gradient values are compressed. The output image generator module is configured to receive the compressed range gradient image and to generate therefrom an image, the image generated by the output image generator module comprising the output image.
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LCIS: A Boundary Hierarchy for Detail-Preserving Contrast Reduction, Tumblin et al., Siggraph 99, pp. 83-90.
Fattal Raanan
Lischinski Daniel
Werman Michael
Mehta Bhavesh M
Strege John B
Yissum Research Development Company of the Hebrew University of
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