基于多方向小波提升IRFPA盲元检测精度方法
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摘要
红外焦平面成像质量受材料生长及器件制备工艺的影响,易出现盲元、条纹噪声等缺陷。条纹噪声经常会导致盲元的检测偏差,准确的盲元检测对于后续图像处理具有重要意义。利用双密度双树复数小波分解的多方向性小波系数,结合广义高斯分布将高频小波系数按照对条纹噪声影响程度分别赋予不同权值并进行单支重构,消除了条纹噪声对盲元检测的影响,得到初步"干净"的预处理图像,进而对预处理图像运用3σ准则进行盲元检测。通过短波Hg Cd Te红外焦平面成像的实践验证,该方法对具有条纹噪声特征的红外图像盲元检测更加准确。
Subjected to the material quality and the device fabrication techniques, the IRFPAs usually suffer from bad pixels and stripe noise. The accuracy of the bad pixel detection is always influenced by the stripe noises, which should be optimized for more precise imaging processing. A preliminary "clean" image was accomplished without the influence of stripe noises by reconstructed double density double tree complex wavelet coefficients with different weights. After that, the image preprocessing was utilized to detect the bad pixels with 3σ criterion. Finally, this method was testified by a image processing from short-wave IRFPA. The bad pixels detection in the infrared image is much more accurate in spite of the stripe noise.
Subjected to the material quality and the device fabrication techniques, the IRFPAs usually suffer from bad pixels and stripe noise. The accuracy of the bad pixel detection is always influenced by the stripe noises, which should be optimized for more precise imaging processing. A preliminary "clean" image was accomplished without the influence of stripe noises by reconstructed double density double tree complex wavelet coefficients with different weights. After that, the image preprocessing was utilized to detect the bad pixels with 3σ criterion. Finally, this method was testified by a image processing from short-wave IRFPA. The bad pixels detection in the infrared image is much more accurate in spite of the stripe noise.
引文
[1]Hao Lichao,Huang Aibo,Lai Canxiong,et al.Research of IRFPAs′reliability evaluation by bad pixel[C]//SPIE,2015:96740H.
[2]中国国家标准化管理委员会.GB/T 17444-2013红外焦平面阵列参数测试方法[S].北京:中国标准出版社,2013.
[3]Chen Dachuan,Liu Chanlao,Zhen Yangguang.Algorithm of blind pixels auto-searching and compensation for IRFPA[J].Laser&Infrared,2008,38(12):1215-1217.(in Chinese)
[4]Luo Maojie,Zhou Jinmei,Liao Sheng.Compositive blindpixel detection and compensation algorithm[J]OptoElectronic Engineering,2011,38(12):57-62.(in Chinese)
[5]Zhang Ke,Zhao Guifang,Cui Ruiqing,et al.Method of improving bad pixel detection precision of IRFPA[J].Infrared and Laser Engineering,2007,36(4):453-456.(in Chinese)
[6]Leng Hanbing,Gong Zhendong,Xie Qingsheng,et al.Adaptive blind pixel detection and compensation for IRFPA based on fuzzy median filter[J].Infrared and Laser Engineering,2015,44(3):821-826.(in Chinese)
[7]Cao Yang,Jin Weiqi,Liu Chongliang.IRFPA dynamic blind element detection algorithm based on scene[C]//National Optoelectronics and Quantum Electronics Conference,2011(6):91-95.
[8]Sergio Goma,Milivoje Aleksic.Bad pixel location algorithm for cell phone cameras[C]//SPIE,2007:65020H-10.
[9]Zhao Chunhui,Liu Zhenlong.A bad pixel detection algorithm for infrared focal plane array based on linear extrapolation theory[J].Journal of Shenyang University,2013,25(4):293-297.(in Chinese)
[10]An Guangqi,Zhao Yan,Zhang Haifeng.Blind pixel detection and compensation on infrared detector[J].Aero Weaponry,2016(3):54-58.(in Chinese)
[2]中国国家标准化管理委员会.GB/T 17444-2013红外焦平面阵列参数测试方法[S].北京:中国标准出版社,2013.
[3]Chen Dachuan,Liu Chanlao,Zhen Yangguang.Algorithm of blind pixels auto-searching and compensation for IRFPA[J].Laser&Infrared,2008,38(12):1215-1217.(in Chinese)
[4]Luo Maojie,Zhou Jinmei,Liao Sheng.Compositive blindpixel detection and compensation algorithm[J]OptoElectronic Engineering,2011,38(12):57-62.(in Chinese)
[5]Zhang Ke,Zhao Guifang,Cui Ruiqing,et al.Method of improving bad pixel detection precision of IRFPA[J].Infrared and Laser Engineering,2007,36(4):453-456.(in Chinese)
[6]Leng Hanbing,Gong Zhendong,Xie Qingsheng,et al.Adaptive blind pixel detection and compensation for IRFPA based on fuzzy median filter[J].Infrared and Laser Engineering,2015,44(3):821-826.(in Chinese)
[7]Cao Yang,Jin Weiqi,Liu Chongliang.IRFPA dynamic blind element detection algorithm based on scene[C]//National Optoelectronics and Quantum Electronics Conference,2011(6):91-95.
[8]Sergio Goma,Milivoje Aleksic.Bad pixel location algorithm for cell phone cameras[C]//SPIE,2007:65020H-10.
[9]Zhao Chunhui,Liu Zhenlong.A bad pixel detection algorithm for infrared focal plane array based on linear extrapolation theory[J].Journal of Shenyang University,2013,25(4):293-297.(in Chinese)
[10]An Guangqi,Zhao Yan,Zhang Haifeng.Blind pixel detection and compensation on infrared detector[J].Aero Weaponry,2016(3):54-58.(in Chinese)