Patent ID: 6404916
Filing Date: 2002-06-11
Classification: G06K,G06T

Abstract:
Apparatus comprising:a converter to convert a signal representative of a pixel color value to a plurality of signals representative of component color values including a hue value, a saturation value, and an intensity value; a hue comparator to determine if the hue value falls within a first range of values; a saturation comparator to determine if the saturation value falls within a second range of values; an intensity comparator to determine if the intensity value falls within a third range of values; and a color identifier connected to each of said hue comparator, said saturation comparator, and said intensity comparator, said color identifier adapted to output a signal representative of a selected color range in response to the hue value falling within the first range of values, the saturation value falling within the second range of values, and the intensity value falling within the third range of values, wherein said first range of values, said second range of values, and said third range of values defined a non-rectangular subvolume in Hue, Saturation, Intensity (HSI) color space, wherein the first range of values comprises a plurality of values between a low hue reference value and a high hue reference value, wherein the second range of values comprises a plurality of values above a low saturation value, and wherein the third range of values comprises a plurality of values between a low intensity value and a high intensity value.