| 改进APEX算法在图像增强中的应用 |
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| 引用本文： | 孙雷,张艳,徐青,张春美.改进APEX算法在图像增强中的应用[J].测绘学院学报,2007(1). |
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| 作者姓名： | 孙雷 张艳 徐青 张春美 |
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| 作者单位： | 信息工程大学测绘学院 河南郑州450052 |
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| 基金项目： | “十.五”预研项目(4060102040)，河南省杰出青年科学基金项目(04120005000) |
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| 摘 要： | APEX是一种基于快速傅立叶变换的直接盲解卷积算法,能够快速复原复杂纹理图像。该算法适用于平移不变且以2维放射对称Le’vy Stable概率密度函数(G类点扩散函数)作为卷积核的图像。论述了A-PEX算法的原理,并针对APEX在适应性和稳定性方面的不足提出了改进方法。实验表明,改进的APEX算法能够有效应用在多种真实模糊图像上,增强图像对比度和锐化图像细节,使图像的视觉效果得到明显改善。
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| 关 键 词： | 图像去模糊 盲解卷积 低指数Stable函数 APEX算法 |
The Improved APEX Method Applied in Image Enhancement |
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| SUN Lei,ZHANG Yan,XU Qing,ZHANG Chun-mei.The Improved APEX Method Applied in Image Enhancement[J].Journal of Institute of Surveying and Mapping,2007(1). |
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| Authors: | SUN Lei ZHANG Yan XU Qing ZHANG Chun-mei |
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| Abstract: | The APEX method is an FFT-based direct blind deconvolution technique that can recover complex texture imagery quickly.The method is appropriate for the a restricted class of shift-invariant blurs that can be expressed as finite convolution products of two-dimensional radially symmetric Le'vy stable probability density function.This paper discussed the theory of APEX method,and put forward the improved method for the deficiency of adaptability and stability of APEX.The improved APEX method could be usefully applied to a wide variety of real blurred images and enhanced contrast and sharpened structural details,leading to noticeable improvement in visual quality. |
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| Keywords: | image deburring blind deconvolution low exponent stable laws APEX method |
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