Towards fusion technique for astronomical images with high dynamic range

Lin Du; Huayan Sun; Zhaofei Hou; Yingying Qi

doi:10.1117/12.2069766

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6 August 2014 Towards fusion technique for astronomical images with high dynamic range

Lin Du, Huayan Sun, Zhaofei Hou, Yingying Qi

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Proceedings Volume 9281, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 92812N (2014) https://doi.org/10.1117/12.2069766
Event: 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2014), 2014, Harbin, China

Abstract

Astronomical detection always need high dynamic range image, but there are problems such as underexposure or overexposure in astronomical images taken by commercial camera, this paper proposed the technique that combine establishing the first order difference quotient curve of each pixel with data feature positioning to calculate optimal exposure value of each pixel, which achieves high dynamic range fusion. In this paper, data feature positioning method was firstly utilized to establish mathematical model to calculate optimal exposure point in the first order difference quotient curve of each pixel in the target scene. Correlate optimal exposure point and camera response function to calculate optimal brightness value of each pixel, the fused high dynamic range image will be achieved. Finally, take a series of low dynamic range images with different exposure value by commercial camera, establish mathematical model and calculate to achieve high dynamic range fusion, which verifies the fusion technique proposed in this paper can obtain high dynamic range astronomical images effectively.

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Lin Du, Huayan Sun, Zhaofei Hou, and Yingying Qi "Towards fusion technique for astronomical images with high dynamic range", Proc. SPIE 9281, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 92812N (6 August 2014); https://doi.org/10.1117/12.2069766

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