The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec)
Online ISSN : 2424-3124
2018
Session ID : 2A2-J14
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An Image Sensor System with Color Constancy Inspired by Biological Early Vision
*Kento MISAKAHirotsugu OKUNO
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Abstract

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.

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© 2018 The Japan Society of Mechanical Engineers
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