透射率全局估计航空影像去雾算法
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摘要
针对雾霾天气会导致航空影像的色彩失真、信息损失,对影像的后期处理和判读造成了负面影响,以暗原色先验为理论基础,结合航空影像的成像特点和景物内容特点提出一种针对航空影像的去雾算法。首先,获取航空影像透射率图并对其自动分割;其次,对影像透射率全局估计和局部优化;最后,根据大气物理模型对影像恢复处理。选取了山区、村镇、城市等各种场景近20组航空影像进行试验,从主观和客观两方面对算法效果进行评价,结果表明该算法具有处理效果稳定、鲁棒性强的特点。
The hazy weather causes color distortion of aerial imagery and loss of information,which has a negative effect to the subsequent image processing and interpretation.Based on the theory of dark channel prior as well as the imaging and scene characteristics of aerial images,this paper proposes an aerial image haze removal algorithm.Firstly,get transmission ratio map of the aerial image and perform segmentation automatically.Secondly,obtain global estimation and local optimization of transmission rate of the image.Finally,recover the image based on the atmospheric physical model.In this paper,we selected nearly 20 groups of aerial images as experiment data including mountains,villages,cities and so on to evaluate the results from both subjective and objective aspects.The results show that the algorithm has characteristics of stable effects and strong robustness.
The hazy weather causes color distortion of aerial imagery and loss of information,which has a negative effect to the subsequent image processing and interpretation.Based on the theory of dark channel prior as well as the imaging and scene characteristics of aerial images,this paper proposes an aerial image haze removal algorithm.Firstly,get transmission ratio map of the aerial image and perform segmentation automatically.Secondly,obtain global estimation and local optimization of transmission rate of the image.Finally,recover the image based on the atmospheric physical model.In this paper,we selected nearly 20 groups of aerial images as experiment data including mountains,villages,cities and so on to evaluate the results from both subjective and objective aspects.The results show that the algorithm has characteristics of stable effects and strong robustness.
引文
[1]KIM J Y,KIM L S,HWANG S H.An advanced contrast enhancement using partially overlapped sub-block histogram equalization[J].IEEE Transactions on Circuits&Systems for Video Technology,2001,11(4):475-484.
[2]祝培,朱虹,钱学明,等.一种有雾天气图像景物影像的清晰化方法[J].中国图象图形学报,2004,9(1):124-128.
[3]SEOW M J,ASARI V K.Ratio rule and homomorphic filter for enhancement of digital colour image[J].Neurocomputing,2006,69(7/9):954-958.
[4]TAN R T.Visibility in bad weather from a single image[C]∥Computer Vision and Pattern Recognition,2008.CVPR2008.IEEE Conference on.IEEE,2008:1-8.
[5]RAHMAN Z,JOBSON D J,WOODELL G A.Multi-scale retinex for color image enhancement[C]∥International Conference on Image Processing,1996.Proceedings.IEEE,2002:1003-1006.
[6]郭璠,蔡自兴,谢斌,等.单幅图像自动去雾新算法[J].中国图象图形学报,2011,16(4):516-521.
[7]NARASIMHAN S G,NAYAR S K.Removing weather effects from monochrome images[C]∥Washington:null,IEEEcomputer Society,2001,2:II-186-II-193.
[8]NAYAR S K,NARASIMHAN S G,SCHECHNER Y Y.Polarization-based vision through haze[J].Applied Optics,2003,42(3):511-525.
[9]NAMER E,SCHECHNER Y Y.Advanced visibility improvement based on polarization filtered images[J].Proceedings of SPIE-The International Society for Optical Engineering,2005,5888:36-45.
[10]SHWARTZ S,NAMER E,SCHECHNER Y Y.Blind haze separation[C]∥Computer Vision and Pattern Recognition,2006IEEE Computer Society Conference on.IEEE,2006:1984-1991.
[11]COX L J.Optics of the Atmosphere-scattering by molecules and particles[J].IEEE Journal of Quantum Electronics,1977,14(9):698-699.
[12]MCCARTNEY E J.Scattering phenomena[J].Science,1977,196:1084-1085.
[13]OAKLEY J P,BU H.Correction of simple contrast loss in color images[J].IEEE Transactions on Image Processing,2007,16(2):511-22.
[14]KOPF J,NEUBERT B,CHEN B,et al.Deep photo:model-based photograph enhancement and viewing[J].Acm Transactions on Graphics,2008,27(5):32-39.
[15]OAKLEY J P,SATHERLEY B L.Improving image quality in poor visibility conditions using aphysical model for contrast degradation[J].IEEE Transactions on Image Processing,1998,7(2):167-179.
[16]NARASIMHAN S G,NAYAR S K.Vision and the atmosphere[J].International Journal of Computer Vision,2002,48(3):233-254.
[17]NARASIMHAN S G,NAYAR S K.Contrast restoration of weather degraded images[J].IEEE Transactions on Pattern Analysis&Machine Intelligence,2003,25(6):713-724.
[18]HE K,SUN J,TANG X.Single image haze removal using dark channel prior[J].IEEE Transactions on Pattern Analysis&Machine Intelligence,2011,33(12):2341-2353.
[19]孙抗,汪渤,周志强,等.基于双边滤波的实时图像去雾技术研究[J].北京理工大学学报,2011,31(7):810-813.
[20]HE K,SUN J,TANG X.Guided image filtering[M].Washington:IEEE Computer Society,2013.
[21]嵇晓强,戴明,尹传历,等.航拍降质图像的去雾处理[J].光学精密工程,2011,19(7):1659-1668.
[22]王敬东,张文涛,王子瑞,等.一种快速航空图像去雾算法[J].航空学报,2013,34(3):636-643.
[23]LONG J,SHI Z,TANG W,et al.Single remote sensing image dehazing[J].IEEE Geoscience&Remote Sensing Letters,2014,11(1):59-63.
[24]杨靖宇,张永生,邹晓亮,等.利用暗原色先验知识实现航空影像快速去雾[J].武汉大学学报(信息科学版),2010,35(11):1292-1295.
[25]王密,潘俊.一种数字航空影像的匀光方法[J].中国图象图形学报,2004,9(6):744-748.
[2]祝培,朱虹,钱学明,等.一种有雾天气图像景物影像的清晰化方法[J].中国图象图形学报,2004,9(1):124-128.
[3]SEOW M J,ASARI V K.Ratio rule and homomorphic filter for enhancement of digital colour image[J].Neurocomputing,2006,69(7/9):954-958.
[4]TAN R T.Visibility in bad weather from a single image[C]∥Computer Vision and Pattern Recognition,2008.CVPR2008.IEEE Conference on.IEEE,2008:1-8.
[5]RAHMAN Z,JOBSON D J,WOODELL G A.Multi-scale retinex for color image enhancement[C]∥International Conference on Image Processing,1996.Proceedings.IEEE,2002:1003-1006.
[6]郭璠,蔡自兴,谢斌,等.单幅图像自动去雾新算法[J].中国图象图形学报,2011,16(4):516-521.
[7]NARASIMHAN S G,NAYAR S K.Removing weather effects from monochrome images[C]∥Washington:null,IEEEcomputer Society,2001,2:II-186-II-193.
[8]NAYAR S K,NARASIMHAN S G,SCHECHNER Y Y.Polarization-based vision through haze[J].Applied Optics,2003,42(3):511-525.
[9]NAMER E,SCHECHNER Y Y.Advanced visibility improvement based on polarization filtered images[J].Proceedings of SPIE-The International Society for Optical Engineering,2005,5888:36-45.
[10]SHWARTZ S,NAMER E,SCHECHNER Y Y.Blind haze separation[C]∥Computer Vision and Pattern Recognition,2006IEEE Computer Society Conference on.IEEE,2006:1984-1991.
[11]COX L J.Optics of the Atmosphere-scattering by molecules and particles[J].IEEE Journal of Quantum Electronics,1977,14(9):698-699.
[12]MCCARTNEY E J.Scattering phenomena[J].Science,1977,196:1084-1085.
[13]OAKLEY J P,BU H.Correction of simple contrast loss in color images[J].IEEE Transactions on Image Processing,2007,16(2):511-22.
[14]KOPF J,NEUBERT B,CHEN B,et al.Deep photo:model-based photograph enhancement and viewing[J].Acm Transactions on Graphics,2008,27(5):32-39.
[15]OAKLEY J P,SATHERLEY B L.Improving image quality in poor visibility conditions using aphysical model for contrast degradation[J].IEEE Transactions on Image Processing,1998,7(2):167-179.
[16]NARASIMHAN S G,NAYAR S K.Vision and the atmosphere[J].International Journal of Computer Vision,2002,48(3):233-254.
[17]NARASIMHAN S G,NAYAR S K.Contrast restoration of weather degraded images[J].IEEE Transactions on Pattern Analysis&Machine Intelligence,2003,25(6):713-724.
[18]HE K,SUN J,TANG X.Single image haze removal using dark channel prior[J].IEEE Transactions on Pattern Analysis&Machine Intelligence,2011,33(12):2341-2353.
[19]孙抗,汪渤,周志强,等.基于双边滤波的实时图像去雾技术研究[J].北京理工大学学报,2011,31(7):810-813.
[20]HE K,SUN J,TANG X.Guided image filtering[M].Washington:IEEE Computer Society,2013.
[21]嵇晓强,戴明,尹传历,等.航拍降质图像的去雾处理[J].光学精密工程,2011,19(7):1659-1668.
[22]王敬东,张文涛,王子瑞,等.一种快速航空图像去雾算法[J].航空学报,2013,34(3):636-643.
[23]LONG J,SHI Z,TANG W,et al.Single remote sensing image dehazing[J].IEEE Geoscience&Remote Sensing Letters,2014,11(1):59-63.
[24]杨靖宇,张永生,邹晓亮,等.利用暗原色先验知识实现航空影像快速去雾[J].武汉大学学报(信息科学版),2010,35(11):1292-1295.
[25]王密,潘俊.一种数字航空影像的匀光方法[J].中国图象图形学报,2004,9(6):744-748.