The Adaptive Measuring Performance of CMOS Image Sensor

This paper presents an adaptive method to obtain chromaticity and luminance by using CMOS image sensor under various environments. The image sensor for a use of colorimeter is characterized based on the CIE standard colorimetric observer. We use the method of least squares to derive a colorimetric characterization matrix between camera RGB output signals and CIE XYZ tristimulus values. This paper proposes a measuring performance to obtain chromaticity and luminance through a 3×3 camera transfer matrix under a certain illuminant. Camera RGB outputs, register values, and camera photoelectric characteristic are used to obtain chromaticity and luminance. Experimental results demonstrate that the proposed method is valid in the measuring performance.