| 反差一致性保持的影像匀光算法 |
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| 引用本文： | 周丽雅,秦志远,尚炜,王建荣.反差一致性保持的影像匀光算法[J].测绘学院学报,2011(1). |
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| 作者姓名： | 周丽雅 秦志远 尚炜 王建荣 |
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| 作者单位： | 信息工程大学测绘学院;信息工程大学理学院;信息工程大学;西安测绘研究所; |
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| 基金项目： | 国家863计划资助项目(2009AA121403) |
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| 摘 要： | 不均匀光照现象是可见光航空航天遥感影像获取过程中常见的降质现象,会导致影像亮度分布不均匀和地物色调发生变化。现有的MASK匀光方法能够在一定程度上解决这类问题,但处理后的影像仍存在反差降低且亮度不均匀的现象。提出了一种基于Wallis滤波器的影像匀光改进算法,通过对影像的合理分块及自动统计标准均值和方差来实现单幅影像的匀光处理。实验表明,该方法可以在很好地保持整幅影像反差一致性的同时,获得更好的影像匀光处理效果。
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| 关 键 词： | 光照不均匀 Wallis匀光 反差一致性 影像分块 方差 |
Image Contrast Dodging Algorithm of Maintaining Consistency |
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| ZOU Li-ya,QIN Zhi-yuan,SHANG Wei,WANG Jian-rong.Image Contrast Dodging Algorithm of Maintaining Consistency[J].Journal of Institute of Surveying and Mapping,2011(1). |
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| Authors: | ZOU Li-ya QIN Zhi-yuan SHANG Wei WANG Jian-rong |
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| Institution: | ZOU Li-ya1,2,QIN Zhi-yuan1,SHANG Wei3,WANG Jian-rong4(1.Institute of Surveying and Mapping,Information Engineering University,Zhengzhou 450052,China,2.Institute of Science,Zhengzhou 450001,3.Information Engineering University,4.Xi'an Research Institute of Surveying and Mapping,Xi'an 710054,China) |
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| Abstract: | Uneven illumination phenomenon is common in lower quality aerial images,it shows uneven distribution of color and brightness in digital aerial images.The existing MASK dodging method can solve these problems in some degree.However,the resulted images also have contrast-reduced and uneven phenomenon.So,a single image based on the Wallis filter dodging algorithm was presented,which achieved single image dodging through reasonable blocking and the automatically achieving the statistics of mean and variance.The... |
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| Keywords: | uneven illumination phenomenon Wallis dodging method contrast consistency processing image block variance |
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