High Dynamic Range image capturing by Spatial Varying Exposed Color Filter Array with specific demosaicking algorithm
Cheuk-Hong Cheng, Oscar C. Au, Ngai‐Man Cheung, Chun‐Hung Liu, Ka-Yue Yip · 2009
High Dynamic Range (HDR) imaging is a future trend for digital imaging. With excessive spatial resolution in digital cameras nowadays, plenty of spaces remain in the dynamic domain to enhance the image quality. In order to produce HDR image using conventional devices, multiple captures with different exposure settings are performed and combined. However, multiple exposure systems requires static photo scene. In this paper, a Spatial Varying Exposure (SVE) system is proposed. By altering the exposure settings in spatial domain, it is possible to capture HDR image from instantaneous scene by trading-off spatial resolution. Moreover, a specific demosaicking algorithm is designed to conceal the color pixels assigned to different exposure fields.