Photograph image-processing method and device thereof

Details Photograph image-processing method and device thereof Photograph image-processing method and device thereof

2005-11-23

2009-11-10

Ahmed, Samir A. (Department: 2624)

Image analysis

Color image processing

C382S168000

Reexamination Certificate

active

07616808

ABSTRACT:
A photograph image-processing method comprises the steps of entering a film image for reading a film image by an image pickup device and generating color image data, generating concentration histograms for each of RGB color components from the color image data, relative-stretch-processing the concentration histograms, calculating and deriving a relative stretch ratio which maximizes the RGB superimposed area which has undergone relative-stretch processing, calculating and deriving an evaluation value of reliability with respect to the relative stretch ratio, calculating and deriving a correction stretch ratio based on the evaluation value, and conversion-processing RGB components of each pixel of the color image data in accordance with the correction stretch ratio.

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Chen, et al, “Automatic Histogram Specification Based onFuzzy Set Operations for Image Enhancement” IEEE Signal Processing Letters, vol. 2. No. 2, Feb. 1995, pp. 37-40.

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