Method for deciding semi-S curve for tone process of a...

Details Method for deciding semi-S curve for tone process of a... Method for deciding semi-S curve for tone process of a...

2005-03-22

2005-03-22

Mehta, Bhavesh M. (Department: 2625)

Image analysis

Color image processing

Pattern recognition or classification using color

C382S165000, C382S169000, C382S274000, C345S589000, C345S617000

Reexamination Certificate

active

06870955

ABSTRACT:
The present invention provides a method for processing tone scale of a digital color image in which the histogram of tone scales (for example, of RGB, YCrCb, Lab or Luv) is considered for deciding the semi-S curve. The semi-S curve suits the digital color image and improves the brightness contrast and color saturation for the image output device. A weighting procedure can also be used for compensating those high occurrence colors in the image, and rearrange and analysis the histogram of tone scale, so as to decrease the influence of the high occurrence colors to the calculation and process of tone scale.

REFERENCES:
patent: 5854851 (1998-12-01), Bamberger et al.
patent: 20010046320 (2001-11-01), Nenonen et al.
Gonzalez et al., Digital Image Processing, 1st ed., 1993, relevant pages only.

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