Television – Special applications – Manufacturing
Patent
1993-12-06
1995-07-11
Britton, Howard W.
Television
Special applications
Manufacturing
348127, 348130, 209522, 209580, 209655, 209939, 250223B, 250226, H04N 718
Patent
active
054325455
ABSTRACT:
A method is provided for detecting the color of objects such as bottles to be recycled so as to enable the bottles to be separated by color. The method which is particularly concerned with determining the color of an object (bottle) with a label attached thereto, begins with the storing of a reference image. Next, a determination is made of whether a bottle is present or absent. If a bottle is present, the image of the bottle is then separated into an intensity image representation of the bottle image, a saturation image representation of the bottle image, and a hue image representation of the bottle image. Then, the reference image is subtracted from the intensity image so that a resultant image is produced with the background contribution removed. Next, a logical "AND" operation is performed on the resultant image and the hue image to create a further image which has no background components. A histogram is then performed on the further image to determine the hue with the maximum number of occurrences. Finally, the position of the color of the object in a three dimensional color subspace is determined by utilizing the hue with the maximum number of occurrences together with the saturation image and the intensity image.
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Britton Howard W.
Tung Bryan S.
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