Method and apparatus for applying color thresholds in light...

G - Physics – 06 – K

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G06K 9/00 (2006.01) G06K 9/38 (2006.01) G06K 9/46 (2006.01) G06T 7/40 (2006.01)

Patent

CA 2380182

A color threshold analyzer includes a converter (210) to convert signals representative of a pixel color value, e.g., red (R), (202) green (G), (202) and blue (B) (202) signals, to signals representing hue (H), saturation (S), and intensity (I) values. Comparators are provided to compare the hue value to upper and lower hue reference values, the saturation value to a lower saturation reference value, and the intensity value to upper and lower intensity values. A color identifier may output a signal indicating that the pixel color value corresponds to a desired color range in response to each of the H, S, and I values falling within their ranges.

L'invention concerne un analyseur de seuils de couleur comportant un convertisseur (210) servant à convertir des signaux représentatifs d'une valeur chromatique de pixel, par exemple des signaux rouge (R) (202), vert (G) (202) et bleu (B) (202), en signaux représentant des valeurs de teinte (H), de saturation (S) et d'intensité (I). Des comparateurs permettent de comparer la valeur de teinte aux valeurs de référence de teinte supérieure et inférieure, la valeur de saturation à une valeur de référence de saturation inférieure et la valeur d'intensité à des valeurs d'intensité supérieure et inférieure. Un identificateur de couleur peut émettre un signal indiquant que la valeur chromatique de pixel correspond à une gamme de couleur voulue en réponse à chacune des valeurs H, S et I comprises dans leurs gammes.

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