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Our key theoretical result is that shield fields can be used to decouple the effects of occluders and incident illumination. We first describe the properties of shield fields in the frequency-domain and briefly analyze the \"forward\" problem of efficiently computing cast shadows. Afterwards, we apply the shield field signal-processing framework to make several new observations regarding the \"inverse\" problem of reconstructing 3D occluders from cast shadows -- extending previous work on shape-from-silhouette and visual hull methods. From this analysis we develop the first single-camera, single-shot approach to capture visual hulls without requiring moving or programmable illumination. We analyze several competing camera designs, ultimately leading to the development of a new large-format, mask-based light field camera that exploits optimal tiled-broadband codes for light-efficient shield field capture. We conclude by presenting a detailed experimental analysis of shield field capture and 3D occluder reconstruction.<\/jats:p>","DOI":"10.1145\/1409060.1409084","type":"journal-article","created":{"date-parts":[[2008,12,3]],"date-time":"2008-12-03T16:56:04Z","timestamp":1228323364000},"page":"1-10","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":34,"title":["Shield fields"],"prefix":"10.1145","volume":"27","author":[{"given":"Douglas","family":"Lanman","sequence":"first","affiliation":[{"name":"Mitsubishi Electric Research Laboratories (MERL) and Brown University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ramesh","family":"Raskar","sequence":"additional","affiliation":[{"name":"Mitsubishi Electric Research Laboratories (MERL) and MIT Media Lab"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amit","family":"Agrawal","sequence":"additional","affiliation":[{"name":"Mitsubishi Electric Research Laboratories (MERL)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gabriel","family":"Taubin","sequence":"additional","affiliation":[{"name":"Brown University"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"320","published-online":{"date-parts":[[2008,12]]},"reference":[{"key":"e_1_2_2_1_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0168-9002(01)01326-2"},{"key":"e_1_2_2_2_1","doi-asserted-by":"publisher","DOI":"10.1109\/34.121783"},{"key":"e_1_2_2_3_1","unstructured":"BowHaus Inc. 2007. 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