| 基于特征图规正的虹膜图像自适应Gamma校正方法 |
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| 引用本文： | 马琳,王钧慧,王宽全,张大鹏.基于特征图规正的虹膜图像自适应Gamma校正方法[J].燕山大学学报,2010,34(2):173-179. |
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| 作者姓名： | 马琳 王钧慧 王宽全 张大鹏 |
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| 作者单位： | 1. 哈尔滨工业大学计算机科学与技术学院,黑龙江哈尔滨,150001
2. 香港理工大学计算机系,香港 |
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| 基金项目： | 黑龙江省归国人员科研基金项目(LC04C07);;哈尔滨市后备人才计划基金项目(2003AFLXJ006) |
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| 摘 要： | 在虹膜图像采集过程中产生的光斑使得整幅虹膜图像的照度不均匀。为了消除照度不均匀对特征提取的影响,本文提出了一种基于特征图规正的自适应Gamma校正方法。该方法将虹膜图像的特征图作为Gamma校正的依据,把距离因素考虑到Gamma校正中,而且利用模拟退火算法实现了关键值Gamma的自适应调整。该方法使Gamma值的变化更加趋于合理,提高了Gamma矫正对光照变化的适应能力,避免了较正后图像的失真。实验证明该方法不仅可以尽可能的提高图像的质量,而且对校正后的图像进行边缘提取,可以获得更加清晰连续的边缘。
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| 关 键 词： | 虹膜图像 修正的Gamma校正 自适应 模拟退火 |
Adaptive Gamma correction method of Iris image based on characteristic pattern |
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| MA Lin ,WANG Jun-hui ,WANG Kuan-quan ,ZHANG David.Adaptive Gamma correction method of Iris image based on characteristic pattern[J].Journal of Yanshan University,2010,34(2):173-179. |
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| Authors: | MA Lin WANG Jun-hui WANG Kuan-quan ZHANG David |
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| Institution: | 1. School of Computer Science and Technology;Harbin Institute of Technology;Harbin;Heilongjiang 150001;China;2. School of Computing;Hong Kong Polytechnic University;Hong Kong;China |
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| Abstract: | Flares are produced during image acquisition, creat illumination unequality on images, especially iris image and greatly reduce image quality. To eliminate such effect of illumination, in this paper, an adaptive Gamma correction method for iris images based on feature graph alignment is presented.This method takes characteristic patterns of iris images as basis for Gamma correction, distance measure definition and distance calculation. Simulated annealing algorithm is applied for Gamma value estimation, thu... |
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| Keywords: | iris image modified Gamma correction adaptive method simulated annealing |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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