.New real-time image processing system for IRFPA[J].Optoelectronics Letters,2006,2(3):225-228 |
New real-time image processing system for IRFPA |
WANG Bing-jian LIU Shang-qian CHENG Yu-bao |
School of Technical Physics,Xidian University,Xi'an 710071 ,China |
Abstract: |
Influenced by detectors' material, manufacturing technology etc, every detector in infrared focal plane array (IRFPA) will
output different voltages even if their input radiation flux is the same. And this is called non-uniformity of IRFPA. At the
same time, the high background temperature, low temperature difference between targets and background and the low responsivity
of IRFPA result in low contrast of infrared images. So non-uniformity correction and image enhancement are important techniques
for IRFPA imaging system. This paper proposes a new real-time infrared image processing system based on Field Programmable
Gate Array(FPGA). The system implements non-uniformity correction, image enhancement and video synthesization etc. By using
parallel architecture and pipeline technique, the system processing speed is as high as 50Mx12bits per second. It is appropriate
greatly to a large IRFPA and a high frame frequency IRFPA imaging system. The system is miniatured in one FPGA. |
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