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电子学报  2012 

基于全向小波的图像边缘检测算法

, PP. 2451-2455

Keywords: 梯度模值,方向小波,边缘检测,图像处理

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Abstract:

针对现有边缘检测算法难以提取图像任意方向的边缘特征,提出基于全向小波的图像边缘检测算法.首先,定义了全向小波的概念、构造其模型并推导了全向小波的最大值与梯度模值相等的关系.理论分析表明本文算法始终沿小波变换值的最大值方向提取边缘.然后,选择二维高斯函数实例化模型,以8方向和3×3变换窗为例进行算法设计.标准图像对比试验表明本文算法能提取更多方向的边缘特征、边界清晰度也比SADD算法、Canny算子分别高出约2.17%、8.66%.

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