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Proceedings Paper

Ripple FPN reduced algorithm based on temporal high-pass filter and hardware implementation
Author(s): Yiyang Li; Shuo Li; Zhipeng Zhang; Weiqi Jin; Lei Wu; Minglei Jin
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Paper Abstract

Cooled infrared detector arrays always suffer from undesired Ripple Fixed-Pattern Noise (FPN) when observe the scene of sky. The Ripple Fixed-Pattern Noise seriously affect the imaging quality of thermal imager, especially for small target detection and tracking. It is hard to eliminate the FPN by the Calibration based techniques and the current scene-based nonuniformity algorithms. In this paper, we present a modified space low-pass and temporal high-pass nonuniformity correction algorithm using adaptive time domain threshold (THP&GM). The threshold is designed to significantly reduce ghosting artifacts. We test the algorithm on real infrared in comparison to several previously published methods. This algorithm not only can effectively correct common FPN such as Stripe, but also has obviously advantage compared with the current methods in terms of detail protection and convergence speed, especially for Ripple FPN correction. Furthermore, we display our architecture with a prototype built on a Xilinx Virtex-5 XC5VLX50T field-programmable gate array (FPGA). The hardware implementation of the algorithm based on FPGA has two advantages: (1) low resources consumption, and (2) small hardware delay (less than 20 lines). The hardware has been successfully applied in actual system.

Paper Details

Date Published: 3 November 2016
PDF: 9 pages
Proc. SPIE 10030, Infrared, Millimeter-Wave, and Terahertz Technologies IV, 100301D (3 November 2016); doi: 10.1117/12.2245953
Show Author Affiliations
Yiyang Li, Beijing Institute of Technology (China)
Shuo Li, Beijing Institute of Technology (China)
Zhipeng Zhang, Tianjin Jinhang Institute of Technical Physics (China)
Weiqi Jin, Beijing Institute of Technology (China)
Lei Wu, Tianjin Jinhang Institute of Technical Physics (China)
Minglei Jin, Beijing Institute of Technology (China)


Published in SPIE Proceedings Vol. 10030:
Infrared, Millimeter-Wave, and Terahertz Technologies IV
Cunlin Zhang; Xi-Cheng Zhang; Masahiko Tani, Editor(s)

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