2019/01/05 by Héctor Andrade-Loarca, Gitta Kutyniok, Andrade-Loarca, Héctor +5
Computer Science · Engineering · Mathematics · #Image Processing Techniques and Applications #Image and Signal Denoising Methods #Optical measurement and interference techniques #cs.LG #eess.IV #eess.SP #msc:35A18 #msc:65T60 #msc:68T10 #stat.ML
paper · pdf · doi:10.48550/arxiv.1901.01388
arxiv created 2019/07/10 · arxiv updated 2019/07/11
Microlocal analysis provides deep insight into singularity structures and is often crucial for solving inverse problems, predominately, in imaging sciences. Of particular importance is the analysis of wavefront sets and the correct extraction of those. In this paper, we introduce the first algorithmic approach to extract the wavefront set of images, which combines data-based and model-based methods. Based on a celebrated property of the shearlet transform to unravel information on the wavefront set, we extract the wavefront set of an image by first applying a discrete shearlet transform and then feeding local patches of this transform to a deep convolutional neural network trained on labeled data. The resulting algorithm outperforms all competing algorithms in edge-orientation and ramp-orientation detection.