{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T22:44:41Z","timestamp":1778885081736,"version":"3.51.4"},"reference-count":37,"publisher":"Association for Computing Machinery (ACM)","issue":"6","license":[{"start":{"date-parts":[[2018,12,4]],"date-time":"2018-12-04T00:00:00Z","timestamp":1543881600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.acm.org\/publications\/policies\/copyright_policy#Background"}],"content-domain":{"domain":["dl.acm.org"],"crossmark-restriction":true},"short-container-title":["ACM Trans. Graph."],"published-print":{"date-parts":[[2018,12,31]]},"abstract":"<jats:p>\n            The bidirectional reflectance distribution function (BRDF) is crucial for modeling the appearance of real-world materials. In production rendering, analytic BRDF models are often used to approximate the surface appearance since they are compact and flexible. Measured BRDFs usually have a more realistic appearance, but consume much more storage and are hard to modify. In this paper, we propose a novel framework for connecting measured and analytic BRDFs. First, we develop a robust method for separating a measured BRDF into diffuse and specular components. This is commonly done in analytic models, but has been difficult previously to do explicitly for measured BRDFs. This diffuse-specular separation allows novel measured BRDF editing on the diffuse and specular parts separately. In addition, we conduct analysis on each part of the measured BRDF, and demonstrate a more intuitive and lower-dimensional PCA model than Nielsen\n            <jats:italic>et al.<\/jats:italic>\n            [2015]. In fact, our measured BRDF model has the same number of parameters (8 parameters) as the commonly used analytic models, such as the GGX model. Finally, we visualize the analytic and measured BRDFs in the same space, and directly demonstrate their similarities and differences. We also design an analytic fitting algorithm for two-lobe materials, which is more robust, efficient and simple, compared to previous non-convex optimization-based analytic fitting methods.\n          <\/jats:p>","DOI":"10.1145\/3272127.3275026","type":"journal-article","created":{"date-parts":[[2018,11,28]],"date-time":"2018-11-28T19:16:10Z","timestamp":1543432570000},"page":"1-15","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":53,"title":["Connecting measured BRDFs to analytic BRDFs by data-driven diffuse-specular separation"],"prefix":"10.1145","volume":"37","author":[{"given":"Tiancheng","family":"Sun","sequence":"first","affiliation":[{"name":"University of California"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Henrik Wann","family":"Jensen","sequence":"additional","affiliation":[{"name":"University of California"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ravi","family":"Ramamoorthi","sequence":"additional","affiliation":[{"name":"University of California"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2018,12,4]]},"reference":[{"key":"e_1_2_2_1_1","doi-asserted-by":"publisher","DOI":"10.1145\/344779.344814"},{"key":"e_1_2_2_2_1","doi-asserted-by":"publisher","DOI":"10.1145\/2907941"},{"key":"e_1_2_2_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1467-8659.2012.03147.x"},{"key":"e_1_2_2_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1467-8659.2011.02072.x"},{"key":"e_1_2_2_5_1","doi-asserted-by":"publisher","DOI":"10.1145\/563858.563893"},{"key":"e_1_2_2_6_1","doi-asserted-by":"publisher","DOI":"10.1145\/2601097.2601193"},{"key":"e_1_2_2_7_1","doi-asserted-by":"publisher","DOI":"10.1145\/357290.357293"},{"key":"e_1_2_2_8_1","doi-asserted-by":"publisher","DOI":"10.1145\/280814.280864"},{"key":"e_1_2_2_9_1","doi-asserted-by":"publisher","DOI":"10.5555\/2858834.2858838"},{"key":"e_1_2_2_10_1","doi-asserted-by":"publisher","DOI":"10.1111\/cgf.12477"},{"key":"e_1_2_2_11_1","doi-asserted-by":"publisher","DOI":"10.2352\/CIC.2012.20.1.art00025"},{"key":"e_1_2_2_12_1","volume-title":"Abhijeet Ghosh, Cornelia Denk, and Mashhuda Glencross.","author":"Guarnera Dar'ya","year":"2016","unstructured":"Dar'ya Guarnera , Giuseppe Claudio Guarnera , Abhijeet Ghosh, Cornelia Denk, and Mashhuda Glencross. 2016 . BRDF representation and acquisition. In Computer Graphics Forum . 625--650. Dar'ya Guarnera, Giuseppe Claudio Guarnera, Abhijeet Ghosh, Cornelia Denk, and Mashhuda Glencross. 2016. BRDF representation and acquisition. In Computer Graphics Forum. 625--650."},{"key":"e_1_2_2_13_1","doi-asserted-by":"publisher","DOI":"10.1145\/2788539.2788544"},{"key":"e_1_2_2_14_1","doi-asserted-by":"publisher","DOI":"10.1145\/3072959.3073621"},{"key":"e_1_2_2_15_1","doi-asserted-by":"publisher","DOI":"10.1145\/258734.258801"},{"key":"e_1_2_2_16_1","doi-asserted-by":"publisher","DOI":"10.1145\/1141911.1141949"},{"key":"e_1_2_2_17_1","doi-asserted-by":"publisher","DOI":"10.1145\/1015706.1015751"},{"key":"e_1_2_2_18_1","doi-asserted-by":"publisher","DOI":"10.1145\/2077341.2077350"},{"key":"e_1_2_2_19_1","doi-asserted-by":"publisher","DOI":"10.1145\/882262.882343"},{"key":"e_1_2_2_20_1","doi-asserted-by":"publisher","DOI":"10.5555\/882404.882439"},{"key":"e_1_2_2_21_1","doi-asserted-by":"publisher","DOI":"10.1145\/2343483.2343493"},{"key":"e_1_2_2_22_1","volume-title":"Proceedings of the Eurographics Symposium on Rendering. 117--226","author":"Ngan Addy","year":"2005","unstructured":"Addy Ngan , Fr\u00e9do Durand , and Wojciech Matusik . 2005 . Experimental Analysis of BRDF Models . In Proceedings of the Eurographics Symposium on Rendering. 117--226 . Addy Ngan, Fr\u00e9do Durand, and Wojciech Matusik. 2005. Experimental Analysis of BRDF Models. In Proceedings of the Eurographics Symposium on Rendering. 117--226."},{"key":"e_1_2_2_23_1","doi-asserted-by":"publisher","DOI":"10.6028\/NBS.MONO.160"},{"key":"e_1_2_2_24_1","doi-asserted-by":"publisher","DOI":"10.1145\/2816795.2818085"},{"key":"e_1_2_2_25_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF01679684"},{"key":"e_1_2_2_26_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1467-8659.2012.03152.x"},{"key":"e_1_2_2_27_1","doi-asserted-by":"publisher","DOI":"10.1145\/360825.360839"},{"key":"e_1_2_2_28_1","doi-asserted-by":"crossref","unstructured":"Szymon M Rusinkiewicz. 1998. A new change of variables for efficient BRDF representation. In Rendering techniques 98. 11--22.  Szymon M Rusinkiewicz. 1998. A new change of variables for efficient BRDF representation. In Rendering techniques 98. 11--22.","DOI":"10.1007\/978-3-7091-6453-2_2"},{"key":"e_1_2_2_29_1","doi-asserted-by":"publisher","DOI":"10.1145\/2980179.2980242"},{"key":"e_1_2_2_30_1","doi-asserted-by":"publisher","DOI":"10.1109\/CVPR.2017.619"},{"key":"e_1_2_2_31_1","doi-asserted-by":"publisher","DOI":"10.1111\/cgf.13348"},{"key":"e_1_2_2_32_1","doi-asserted-by":"publisher","DOI":"10.1111\/cgf.13223"},{"key":"e_1_2_2_33_1","doi-asserted-by":"publisher","DOI":"10.1145\/1276377.1276411"},{"key":"e_1_2_2_34_1","doi-asserted-by":"publisher","DOI":"10.1145\/2897839.2927455"},{"key":"e_1_2_2_35_1","doi-asserted-by":"publisher","DOI":"10.5555\/2383847.2383874"},{"key":"e_1_2_2_36_1","doi-asserted-by":"publisher","DOI":"10.1145\/142920.134078"},{"key":"e_1_2_2_37_1","volume-title":"Measuring, Modeling, and Reproducing Material Appearance","author":"Zubiaga Carlos J","year":"2015","unstructured":"Carlos J Zubiaga , Laurent Belcour , Carles Bosch , Adolfo Mu\u00f1oz , and Pascal Barla . 2015. 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In Measuring, Modeling, and Reproducing Material Appearance 2015, Vol. 9398. 939808."}],"container-title":["ACM Transactions on Graphics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/3272127.3275026","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/dl.acm.org\/doi\/pdf\/10.1145\/3272127.3275026","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,6,18]],"date-time":"2025-06-18T00:44:04Z","timestamp":1750207444000},"score":1,"resource":{"primary":{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/3272127.3275026"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,12,4]]},"references-count":37,"journal-issue":{"issue":"6","published-print":{"date-parts":[[2018,12,31]]}},"alternative-id":["10.1145\/3272127.3275026"],"URL":"https:\/\/doi.org\/10.1145\/3272127.3275026","relation":{},"ISSN":["0730-0301","1557-7368"],"issn-type":[{"value":"0730-0301","type":"print"},{"value":"1557-7368","type":"electronic"}],"subject":[],"published":{"date-parts":[[2018,12,4]]},"assertion":[{"value":"2018-12-04","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}