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According to irradiation-reflection model, by combining the generalized bounded operation model with guide filter, the problem of enhancement for multispectral degraded images with blurred details can be effectively solved and the contrast and low signal-to-noise ratio can be improved. The multi-scale reflection component image, i.e., final enhanced image is obtained through the following procedures: using the adaptive different scales of guide filter function as surround function estimate reaction; separating out the high-low-frequency information; obtaining the different scales Irradiation images which react the overall structure of the image; using the bounded generalized logarithmic ratio (GLR) model addition to replace the Retinex logarithmic transformation; taking a similar logarithmic transformation to the original image to improve the contrast of the image and make the dark area of image details enhanced; again using GLR model subtraction to remove illuminate components from the original image to segment the different scales of the reflection image, thereby avoiding the loss of small details and the big details caused halo effect and noise interference. With four direction Sobel gradient image which reflects the comprehensive edge details of image information the adaptive gain function can be obtained. To avoid the smooth area noise amplification, by using the GLR model multiplication and addition to fuse the effective information of different scales images, the multi-scale reflection image, namely the final enhanced image are obtained. The effective suppression of the emergence of halo effect and computing overflow, which can retain a large number of image details; the comparision of subjective visual effect and the quantitative parameter analysis of the visible low illumination image, haze image, infrared image and X-ray medical images (a total of four groups of multispectral degraded images), the use of the contrast and entropy as evaluation indices, qualitative and quantitative comparison with a variety of image enhancement algorithms, show that the proposed algorithm strengthens and keeps the details of the image texture and edge, realizes the image contrast enhancement and the effective dynamic range compression, has a strong anti-noise ability, and can meet a variety of practical engineering image enhancement needs. The results of the study has been used in the infrared thermal imager, and good results have been achieved. The proposed algorithm is only for 8-bit grayscale image enhancement, and the color image enhancement will be studied in the future.
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Keywords:
- image enhancement /
- irradiation_reflection model /
- bounded operation /
- guide filter
[1] Liu S G, Chen J H, Fan H Y 2011 Chin. Phys. B 20 120305
[2] Zhao W D, Zhao J, Xu Z J 2013 Acta Phys. Sin. 62 214204 (in Chinese) [赵文达, 赵建, 续志军 2013 物理学报 62 214204]
[3] Tan R T 2008 IEEE Conference on Computer Vision and Pattern Recognition 2008 p1
[4] He K, Sun J, Tang X 2009 IEEE Conference on Computer Vision and Pattern Recognition 2009 p1956
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[14] Zhu R F, Jia H G, Wang C, Wei Q, Zhang T Y, Yu L Y 2014 Optics and Precision Engineering 22 1064 (in Chinese) [朱瑞飞, 贾宏光, 王超, 魏群, 张天翼, 虞林瑶 2014 光学精密工程 22 1064]
[15] Wang R G, Zhu J, Yang W T, Fang S, Zhang X T 2010 Acta Electron. Sin. 38 1181 (in Chinese) [汪荣贵, 朱静, 杨万挺, 方帅, 张新彤 2010 电子学报 38 1181]
[16] Deng G, Cahill L W, Tobin G R 1995 IEEE Trans. Image Process. 4 506
[17] Deng G 2013 IEEE Trans. Image Process. 22 2903
[18] Nielsen F, Nock R 2009 IEEE Trans. Inform. Theory 55 2882
[19] Jia H G, Wu Z P, Zhu M C, Xuan M, Liu H 2013 Optics and Precision Engineering 21 3272 (in Chinese) [贾宏光, 吴泽鹏, 朱明超, 宣明, 刘慧 2013 光学精密工程 21 3272]
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[1] Liu S G, Chen J H, Fan H Y 2011 Chin. Phys. B 20 120305
[2] Zhao W D, Zhao J, Xu Z J 2013 Acta Phys. Sin. 62 214204 (in Chinese) [赵文达, 赵建, 续志军 2013 物理学报 62 214204]
[3] Tan R T 2008 IEEE Conference on Computer Vision and Pattern Recognition 2008 p1
[4] He K, Sun J, Tang X 2009 IEEE Conference on Computer Vision and Pattern Recognition 2009 p1956
[5] Yu D, Bao X D 2010 J. Biomed. Engineer. Res. 29 5 (in Chinese) [余岱, 鲍旭东 2010 生物医学工程研究 29 5]
[6] Jia D Y, Ding T H 2005 Acta Phys. Sin. 54 4058 (in Chinese) [郏东耀, 丁天怀 2005 物理学报 54 4058]
[7] Land E H 1977 Sci. Am. 237 108
[8] Jobson D J, Rahman Z, Woodell G A 1997 IEEE Trans. Image Process. 6 451
[9] Xu X, Chen Q, Wang P A, Sun H J, Xia D S 2008 J. Computer-Aided Design & Computer Graphics 20 1325 (in Chinese) [许欣, 陈强, 王平安, 孙怀江, 夏德深 2008 计算机辅助设计与图形学学报 20 1325]
[10] Meylan L 2006 IEEE Trans. Image Process. 15 2820
[11] Tang L, Zhao C X, Wang H N, Shao W Z 2008 J. Image and Graphics 13 264 (in Chinese) [唐磊, 赵春霞, 王鸿南, 邵文泽 2008 中国图象图形学报 13 264]
[12] Fang S, Yang J R, Cao Y, Wu P F, Rao R Z 2012 J. Image and Graphics 17 748 (in Chinese) [方帅, 杨静荣, 曹洋, 武鹏飞, 饶瑞中 2012 中国图象图形学报 17 748]
[13] Jourlin M, Phinoli J C 1989 J. Microscopy 156 33
[14] Zhu R F, Jia H G, Wang C, Wei Q, Zhang T Y, Yu L Y 2014 Optics and Precision Engineering 22 1064 (in Chinese) [朱瑞飞, 贾宏光, 王超, 魏群, 张天翼, 虞林瑶 2014 光学精密工程 22 1064]
[15] Wang R G, Zhu J, Yang W T, Fang S, Zhang X T 2010 Acta Electron. Sin. 38 1181 (in Chinese) [汪荣贵, 朱静, 杨万挺, 方帅, 张新彤 2010 电子学报 38 1181]
[16] Deng G, Cahill L W, Tobin G R 1995 IEEE Trans. Image Process. 4 506
[17] Deng G 2013 IEEE Trans. Image Process. 22 2903
[18] Nielsen F, Nock R 2009 IEEE Trans. Inform. Theory 55 2882
[19] Jia H G, Wu Z P, Zhu M C, Xuan M, Liu H 2013 Optics and Precision Engineering 21 3272 (in Chinese) [贾宏光, 吴泽鹏, 朱明超, 宣明, 刘慧 2013 光学精密工程 21 3272]
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