INVARIANT OPTICAL RECOGNITION OF COLOR RANGE PATTERNS USING IMAGE ENCODING

Correlation methods for recognition of polychromatic range images are presented. First, polychromatic range images are described. The correl ation can be performed using either a single channel compressing both the range and the color images or a multichannel approach. The advanta ges of both methods are discussed. Translation invariant recognition a long the x, y, and z axis is obtained. In the single channel approach, the range and the hue are combined using phase and amplitude coding. Then the double-channel approach is considered using sine-coding for t he input image and phase-coding for the reference image. Finally, both channels are combined in order to improve the discrimination capabili ty of the system. Optical implementation is performed.