Method and circuit arrangement for electronic retouching of imag

Details Method and circuit arrangement for electronic retouching of imag Method and circuit arrangement for electronic retouching of imag

1994-09-19

1996-11-05

Mancuso, Joseph

Image analysis

Image enhancement or restoration

Intensity, brightness, contrast, or shading correction

358531, G06K 940

Patent

active

055726070

ABSTRACT:
A method and circuit arrangement for electronic retouching of color images is provided. The color signals of at least one color component acquired by pixel-by-pixel and line-by-line, trichromatic scanning of an original are digitized and stored as color values. The pixels of the color values to be retouched in the color image are marked by shifting a correction field that contains at least one dot element over the image region to be retouched, using the marking device of a coordinate acquisition unit. Before the retouch, a correction intensity distribution that achieves the desired retouch effect is declared for the correction field of the marking device. Correction intensity values allocated pixel-by-pixel are identified for the color values of the marked pixels of the color image and the color values to be retouched are modified by the correction intensity values under visual control. The correction intensity values to be utilized for the modification of the color values are thereby calculated by a maximum or minimum selection, as a result whereof the action of a real retouch brush is simulated.

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