关键词: 二进小波, àtrous算法, 图像, 边缘检测

Abstract: This paper proposes an image edge detection algorithm based on dyadic wavelet transform. Dyadic wavelet uses modulus local maximum to extract the multiscale edge information and has the shiftinvariant features, so it has fast feature extraction and accurate edge detection. Comparison of edge detection results show that dyadic wavelet edge detection has better effect than reference［4］, with obvious cell borders and clear edge.

Key words: dyadic wavelets, àtrous algorithm, image, edge detection