Color sensor is also called color recognition sensor or color sensor, it is the object color with the previous reference color has been taught to compare to detect the color of the sensor, when the two colors in a certain error range match, the output detection results.
Color sensors play an extremely important role in end devices such as calibration devices for color monitors; color printers and plotters; paint, textile, and cosmetic manufacturing, as well as medical applications such as blood diagnostics, urinalysis, and cosmetic dentistry. The complexity of a color sensor system depends in large part on the number of wavelength spectral bands or signal channels it uses to determine color. There is a wide variety of such systems, ranging from relatively simple three-channel colorimeters to multi-band spectrometers.