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Graph."],"published-print":{"date-parts":[[2009,12]]},"abstract":"<jats:p>For many computational photography applications, the lighting and materials in the scene are critical pieces of information. We seek to obtain<jats:italic>intrinsic images<\/jats:italic>, which decompose a photo into the product of an<jats:italic>illumination<\/jats:italic>component that represents lighting effects and a<jats:italic>reflectance<\/jats:italic>component that is the color of the observed material. This is an under-constrained problem and automatic methods are challenged by complex natural images. We describe a new approach that enables users to guide an optimization with simple indications such as regions of constant reflectance or illumination. Based on a simple assumption on local reflectance distributions, we derive a new propagation energy that enables a closed form solution using linear least-squares. We achieve fast performance by introducing a novel downsampling that preserves local color distributions. We demonstrate intrinsic image decomposition on a variety of images and show applications.<\/jats:p>","DOI":"10.1145\/1618452.1618476","type":"journal-article","created":{"date-parts":[[2009,12,8]],"date-time":"2009-12-08T20:53:14Z","timestamp":1260305594000},"page":"1-10","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":135,"title":["User-assisted intrinsic images"],"prefix":"10.1145","volume":"28","author":[{"given":"Adrien","family":"Bousseau","sequence":"first","affiliation":[{"name":"INRIA\/Grenoble University and MIT CSAIL"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sylvain","family":"Paris","sequence":"additional","affiliation":[{"name":"Adobe Systems, Inc."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fr\u00e9do","family":"Durand","sequence":"additional","affiliation":[{"name":"MIT CSAIL"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"320","published-online":{"date-parts":[[2009,12]]},"reference":[{"key":"e_1_2_2_1_1","doi-asserted-by":"publisher","DOI":"10.1109\/CVPR.2006.106"},{"key":"e_1_2_2_2_1","unstructured":"Barrow H. and Tenenbaum J. 1978. 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