基于过零检测的子波变换图像边缘检测

Image Edge Detection Using Wavelet-Transform Based on Locating Zero-Crossings

以基于过零检测的子波变换方法，对256×256×8bits／像素Lena图像进行边缘提取，得到不同尺度下的边缘．结果表明，此法能有效提取边缘，既保留了子波变换进行边缘提取的各种优点，又吸收了LoG算子进行边缘提取的简洁性，算法更简单，计算效率更高．

Using the method of wavelet-transform based on locating zero-crossings, the edges of the 256×256×8bit/pixel lena image are got in multiscale. The results show that the edges can be extracted efficiently.This algorithm retains the advantages of wavelet-transform and also absorbs the simpleness of the LoGoperator. It's more simple and more efficient in calculation.