A study of color features for reading a resistor

The resistance of a resistor is defined by colored lines printed on the resistor´s body. Normally, people read it by sight Though, if a computer performs this instead, we can reduce the costs. We have proposed a method for reading the resistor by image processing techniques. However, color features for reading a resistor is little studied. In this paper, we examine 10 color features (RGB, XYZ, YCbCr, YIQ, HSI, HSV, HLS, L^* u^* v^*, L^* a^* b^*, and I1I2I3) in order to read the resistor´s colors. The experimental results show the special effectiveness of the L^* u^* v^* color feature.