Accurate estimation of camera response function for high dynamic range measurement

A high dynamic range surface has large reflectivity variations and measuring it with a structured light technique could cause pixel saturation that will seriously degrade the measurement accuracy. Accurate identification of saturated pixels will significantly improve the measurement accuracy. This paper introduces an accurate estimation approach to the camera response function (CRF) for high dynamic range measurement and proposes a method that uses the estimated CRF to identify the saturated pixels in captured images. We perform experiments using the proposed saturation identification method and the other existing methods to compare both the saturation identification accuracy and measurement accuracy. The experiment results verify both the accuracy and suitability of the proposed method. (C) 2021 Optical Society of America

Automated summary

This paper introduces an accurate estimation approach for the camera response function (CRF) and proposes a method to identify saturated pixels in captured images using the estimated CRF. Experimental results verify the accuracy and suitability of the proposed method.