Search - edge detection with contourlet

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[Special Effects] contour DL : 0: 用contourlet进行人脸边缘的检测<matlab>-Contourlet to face with the edge detection
Update : 2025-02-17 Size : 1kb Publisher : Samantha
[matlab] Pudn DL : 0: A filter bank structure that can deal effectively with piecewise smooth images with smooth contours, was proposed by Minh N Do and Martin Vetterli. The resulting image expansion is a directional multiresolution analysis framework composed of contour segments, and thus is named contourlet. This will overcome the challenges of wavelet and curvelet transform. Contourlet transform is a double filter bank structure. It is implemented by the pyramidal directional filter bank (PDFB) which decomposes images into directional subbands at multiple scales. In terms of structure the contourlet transform is a cascade of a Laplacian Pyramid and a directional filter bank. In essence, it first use a wavelet-like transform for edge detection, and then a local directional transform for contour segment detection. The contourlet transform provides a sparse representation for two-dimensional piecewise smooth signals that resemble images.
Update : 2025-02-17 Size : 14kb Publisher : Aynesh