Enhancing contrast of video data while preserving sharpness

Details Enhancing contrast of video data while preserving sharpness Enhancing contrast of video data while preserving sharpness

2005-11-09

2010-10-19

Mehta, Bhavesh M (Department: 2624)

Image analysis

Image enhancement or restoration

Intensity, brightness, contrast, or shading correction

C348S086000, C348S086000

Reexamination Certificate

active

07817873

ABSTRACT:
A method of enhancing the contrast of image or video data may include applying a contrast increasing transfer function to a reference image to generate an enhanced image. A transformation may be applied to the reference image to generate reference high frequency components and may also be applied to the enhanced image to generate enhanced high frequency components. For a pixel in the reference image, whether a corresponding enhanced high frequency component has a higher energy than a corresponding reference high frequency component may be determined. The method may also include replacing the pixel in the reference image with a corresponding pixel in the reference image if the corresponding enhanced high frequency component has a higher energy than the corresponding reference high frequency component.

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Taiwan Patent Office, English Translation of Office Action issued in corresponding Taiwan Application No. 95141176, 15 pages, Nov. 10, 2009.

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