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A real-time high dynamic range (HDR) imaging and display method based on correlated double sampling is proposed for short-wave infrared (SWIR) cameras in order to effectively improve its range of brightness and contrast, as well as to obtain more image details. The method utilizes the correlated double sampling technique of the SWIR detector to extend the 14-bit raw image into a 16-bit HDR image and achieve 4 times the HDR imaging. Subsequently, a dynamic range compression process, including logarithmic mapping and histogram equalization, is performed for the 16-bit HDR image to be mapped to an 8-bit display. Finally, the experimental results show that the method can enrich the details of SWIR images under the premise of ensuring real-time imaging.


Cheng Fei, Junliang Liu, Yongfu Li, Yi Gu, Zhaojun Liu, Xian Zhao, Jiaxiong Fang. Short-wave infrared real-time high dynamic range imaging and display based on correlated double sampling. Applied optics. 2021 Feb 20;60(6):1774-1779

PMID: 33690518

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