Image processing apparatus

Details Image processing apparatus Image processing apparatus

2004-03-23

2009-08-11

Tran, Sinh N (Department: 2622)

Image analysis

Histogram processing

With a gray-level transformation

C348S254000, C348S222100

Reexamination Certificate

active

07574042

ABSTRACT:
An image processing apparatus includes a photographing condition estimation unit for estimating a photographing condition of the input image based on photometric information and focal information. A Y/C separation unit separates the input image into a luminance signal and a color difference signal; a luminance correction unit extracts an edge from the luminance signal and corrects the luminance signal by a gradation conversion curve; a color difference correction unit corrects the color difference signal based on luminance signals obtained before and after the gradation correction and a theoretical limit characteristic of color reproduction; a skin color correction unit performs skin color correction depending on the photographing condition; and a Y/C synthesis unit synthesizes the luminance signal and the color difference signal obtained after the correction. Gradation correction is performed on the input image such that appropriate hue and saturation are achieved while emphasizing a main object.

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English translation of Japanese Office Action dated Aug. 12, 2008, issued in counterpart Japanese Application.
Japanese Office Action dated Aug. 12, 2008, issued in counterpart Japanese Application No. 2000-044903.
Japanese Office Action dated Aug. 12, 2008, issued in counterpart Japanese Application No. 2000-044904.

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