Image analysis – Color image processing – Color correction
Patent
1997-10-09
2000-01-25
Tadayon, Blian
Image analysis
Color image processing
Color correction
382168, 382254, 382274, G06K 900, G06K 940
Patent
active
060185880
ABSTRACT:
In an image enhancement method and circuit, a luminance signal is extracted from input color signals. Histogram equalization is performed using a cumulative density function of the extracted luminance signal which is input in a screen unit. A transform function is controlled to map a mean level of the extracted luminance signal to itself, so that an adjusted luminance signal is output. The color signals are varied according to the variation of the luminance signals to output compensated color signals. Thus, image contrast is enhanced, and an undistorted color signal is provided at the same time. In order to reduce the hardware of the circuit, an interpolated cumulative density function is obtained by interpolating a quantized cumulative density function of an input luminance image and is used as a transform function. The transform function is controlled to map a mean level of the input luminance image to itself.
REFERENCES:
patent: 5345277 (1994-09-01), Blankevoort et al.
patent: 5862254 (1999-01-01), Kim et al.
Novik Dmitry A.
Samsung Electronics Co,. Ltd.
Tadayon Blian
LandOfFree
Image enhancement circuit and method using mean matching/quantiz does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image enhancement circuit and method using mean matching/quantiz, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image enhancement circuit and method using mean matching/quantiz will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2321510