Image analysis – Color image processing – Pattern recognition or classification using color
Patent
1996-11-22
1999-08-17
Rogers, Scott
Image analysis
Color image processing
Pattern recognition or classification using color
382287, 382291, 358505, 358488, G06K 900, H04N 156
Patent
active
059405317
ABSTRACT:
Disclosed is an image signal processing apparatus that accurately detect the position of a specific portion of an object to be sensed. The image signal processing apparatus is adapted for an image sensing apparatus having an image sensing device for sensing an image of an object together with a target having a plurality of colors of different hues to produce an image signal. The image signal processing apparatus includes a color difference signal generation circuit, a detection circuit and a determining circuit. A color difference signal generation circuit, connected to the image sensing device, receives the image signal and produces a color difference signal. The detection circuit, connected to the color difference signal generation circuit, receives the color difference signal to detect if the color difference signal lies in a level range previously set in accordance with individual colors, and produces detection signals corresponding to the colors based on a detection result. The determining circuit, connected to the detection circuit, receives the detection signal and determines a position of the target in accordance with the detection signals.
REFERENCES:
patent: 4991223 (1991-02-01), Bradley
patent: 5796869 (1998-08-01), Tsuji et al.
patent: 5798844 (1998-08-01), Sakano et al.
Nakakuki Toshio
Takahashi Tatsuya
Watanabe Tohru
Rogers Scott
Sanyo Electric Co,. Ltd.
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