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Optical Engineering

Display and detail enhancement for high-dynamic-range infrared images
Author(s): Chao Zuo; Qian Chen; Ning Liu; Jianle Ren; Xiubao Sui
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Paper Abstract

Dynamic range reduction and detail enhancement are two important issues for effectively displaying high-dynamic-range images acquired by thermal camera systems. They must be performed in such a way that the high dynamic range image signal output from sensors is compressed in a pleasing manner for display on lower dynamic range monitors without reducing the perceptibility of small details. In this paper, a new method of display and detail enhancement for high dynamic range infrared images is presented. This method effectively maps the raw acquired infrared image to 8-bit domain based on the same architecture of bilateral filter and dynamic range partitioning approach. It includes three main steps: First, a bilateral filter is applied to separate the input image into the base component and detail component. Second, refine the base and detail layer using an adaptive Gaussian filter to avoid unwanted artifacts. Then the base layer is projected to the display range and the detail layer is enhanced using an adaptive gain control approach. Finally, the two parts are recombined and quantized to 8-bit domain. The strength of the proposed method lies in its ability to avoid unwanted artifacts and adaptability in different scenarios. Its great performance is validated by the experimental results tested with two real infrared imagers.

Paper Details

Date Published: 1 December 2011
PDF: 10 pages
Opt. Eng. 50(12) 127401 doi: 10.1117/1.3659698
Published in: Optical Engineering Volume 50, Issue 12
Show Author Affiliations
Chao Zuo, Nanjing Univ. of Science & Technology (China)
Qian Chen, Nanjing Univ. of Science & Technology (China)
Ning Liu, Nanjing Univ. of Science & Technology (China)
Jianle Ren, Nanjing Univ. of Science & Technology (China)
Xiubao Sui, Nanjing Univ. of Science & Technology (China)

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