Color feature extracting apparatus and method therefor capable o

Details Color feature extracting apparatus and method therefor capable o Color feature extracting apparatus and method therefor capable o

1998-09-16

2000-10-31

Powell, Mark R.

Computer graphics processing and selective visual display system

Display peripheral interface input device

345147, 345154, 358518, 348590, 348661, G06F 1730

Patent

active

061409979

ABSTRACT:
A color feature extracting apparatus is provided, which can easily transform a RGB color space into a color space close to the human sense and execute color classification and color region distinction of a digital image in the transformed color space. RGB values of each pixel of a digital image are transformed into HLS values by a color space transforming section. A hue value and a luminosity value of the HLS values are corrected by a hue correcting section and a luminosity correcting section, respectively, so that a region between a green color and a yellow color in a direction of hue and a region between the green color and a light blue color in the direction of hue are narrowed and a region between a red color and the yellow color in the direction of hue is widened in a color space represented by the HLS values. Then, the color features of the digital image are extracted by a color feature extracting section on the basis of the corrected hue value and luminosity value.

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