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基于全局信息的图像增强组合方法 被引量:1

Combined Method Based on Global Prior for Image Enhancement
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摘要 从分析图像增强的偏微分方程直方图修正方法的迭代过程出发,改进了偏微分方程的直方图修正模型。在此基础上,通过对图像的梯度信息和直方图信息的合理组合,提出了基于全局信息的图像增强组合方法。并利用图像直方图的根方差和图像噪声的根方差,构造了两种方法组合的权重因子,给出了权重因子的计算方法。同时设计了快速算法,提出了一种评价图像清晰度的指标。实验结果表明:该方法可以有效地实现对比度增强、噪声抑制和边缘保护。 The partial differential equation (PDE) process for the histogram modifications is modified. Histogram modifications and the forward and backward (FAB) diffusion processes are combined for the image enhancement. The trade-off parameter between the FAB diffusion and the histogram modification is controlled by the variance of the image noise and the image histogram. Meanwhile the fast algorithm is designed. Experimental results show that the method can enhance, sharpen, and denoise images.
出处 《数据采集与处理》 CSCD 北大核心 2005年第4期432-435,共4页 Journal of Data Acquisition and Processing
基金 国家自然科学基金(60272013)资助项目 全国优秀博士论文作者专项基金(200140)资助项目
关键词 图像增强 直方图均衡 前向-后向扩散方程 图像噪声抑制 image enhancement histogram modifications forward and backward (FAB) diffusion image denoising
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参考文献9

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共引文献29

同被引文献10

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