Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : June 02, 2018 - June 05, 2018
Color constancy is an important feature for robotic vision because changing illumination in the natural condition can change the apparent color of objects. In this study, we developed a sensor system with color constancy that consists of a CMOS image-sensor, a field-programmable gate array (FPGA), and a personal computer (PC). The system achieves color constancy by a method that mimics the function of the early vision: Logarithmic transformation from light intensity into an output signal and subtraction of spatial low-pass filtered images of double-opponent color. The PC computes the color information using the images processed by the FPGA. The system was tested by presenting Mondrian under varying color of illumination. As a result, the system output color information that is insusceptible to the color of the illumination.