{"id":"https://openalex.org/W2529037988","doi":"https://doi.org/10.2312/stag.20161374","title":"Practical Free-form RTI Acquisition with Local Spot Lights","display_name":"Practical Free-form RTI Acquisition with Local Spot Lights","publication_year":2016,"publication_date":"2016-01-01","ids":{"openalex":"https://openalex.org/W2529037988","doi":"https://doi.org/10.2312/stag.20161374","mag":"2529037988"},"language":"en","primary_location":{"id":"pmh:oai:oai.crs4.it:123456789/34","is_oa":true,"landing_page_url":"http://www.crs4.it/vic/cgi-bin/bib-page.cgi?id=%27Pintus:2016:PFR%27","pdf_url":"http://www.crs4.it/vic/cgi-bin/bib-page.cgi?id=%27Pintus:2016:PFR%27","source":{"id":"https://openalex.org/S4377196923","display_name":"CRS4 Open Archive (Center for Advanced Studies Research and Development in Sardinia)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I2800759272","host_organization_name":"Center for Advanced Studies Research and Development in Sardinia","host_organization_lineage":["https://openalex.org/I2800759272"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Proc. Smart Tools and Apps for Graphics (STAG) 2016","raw_type":"info:eu-repo/semantics/article"},"type":"article","indexed_in":["datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"http://www.crs4.it/vic/cgi-bin/bib-page.cgi?id=%27Pintus:2016:PFR%27","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5066740670","display_name":"Ruggero Pintus","orcid":"https://orcid.org/0000-0003-1786-7068"},"institutions":[{"id":"https://openalex.org/I2800759272","display_name":"Center for Advanced Studies Research and Development in Sardinia","ror":"https://ror.org/03jdxdk20","country_code":"IT","type":"facility","lineage":["https://openalex.org/I2800759272"]}],"countries":["IT"],"is_corresponding":true,"raw_author_name":"Pintus, Ruggero","raw_affiliation_strings":["CRS4, Italy#TAB#"],"affiliations":[{"raw_affiliation_string":"CRS4, Italy#TAB#","institution_ids":["https://openalex.org/I2800759272"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5087146213","display_name":"Irina-Mihaela Ciortan","orcid":"https://orcid.org/0000-0003-0541-1039"},"institutions":[{"id":"https://openalex.org/I119439378","display_name":"University of Verona","ror":"https://ror.org/039bp8j42","country_code":"IT","type":"education","lineage":["https://openalex.org/I119439378"]}],"countries":["IT"],"is_corresponding":false,"raw_author_name":"Ciortan, Irina Mihaela","raw_affiliation_strings":["University of Verona, Italy#TAB#"],"affiliations":[{"raw_affiliation_string":"University of Verona, Italy#TAB#","institution_ids":["https://openalex.org/I119439378"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5056042099","display_name":"Andrea Giachetti","orcid":"https://orcid.org/0000-0002-7523-6806"},"institutions":[{"id":"https://openalex.org/I119439378","display_name":"University of Verona","ror":"https://ror.org/039bp8j42","country_code":"IT","type":"education","lineage":["https://openalex.org/I119439378"]}],"countries":["IT"],"is_corresponding":false,"raw_author_name":"Giachetti, Andrea","raw_affiliation_strings":["University of Verona, Italy#TAB#"],"affiliations":[{"raw_affiliation_string":"University of Verona, Italy#TAB#","institution_ids":["https://openalex.org/I119439378"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5009229122","display_name":"Enrico Gobbetti","orcid":"https://orcid.org/0000-0003-0831-2458"},"institutions":[{"id":"https://openalex.org/I2800759272","display_name":"Center for Advanced Studies Research and Development in Sardinia","ror":"https://ror.org/03jdxdk20","country_code":"IT","type":"facility","lineage":["https://openalex.org/I2800759272"]}],"countries":["IT"],"is_corresponding":false,"raw_author_name":"Gobbetti, Enrico","raw_affiliation_strings":["CRS4, Italy#TAB#"],"affiliations":[{"raw_affiliation_string":"CRS4, Italy#TAB#","institution_ids":["https://openalex.org/I2800759272"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5066740670"],"corresponding_institution_ids":["https://openalex.org/I2800759272"],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":true,"cited_by_count":4,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10638","display_name":"Optical measurement and interference techniques","score":0.9998000264167786,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10638","display_name":"Optical measurement and interference techniques","score":0.9998000264167786,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10531","display_name":"Advanced Vision and Imaging","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10481","display_name":"Computer Graphics and Visualization Techniques","score":0.9994000196456909,"subfield":{"id":"https://openalex.org/subfields/1704","display_name":"Computer Graphics and Computer-Aided Design"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/computer-vision","display_name":"Computer vision","score":0.607248842716217},{"id":"https://openalex.org/keywords/ray","display_name":"Ray","score":0.5963805913925171},{"id":"https://openalex.org/keywords/photometric-stereo","display_name":"Photometric stereo","score":0.5701520442962646},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.5312642455101013},{"id":"https://openalex.org/keywords/optics","display_name":"Optics","score":0.5220015645027161},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5171977281570435},{"id":"https://openalex.org/keywords/light-field","display_name":"Light field","score":0.48706772923469543},{"id":"https://openalex.org/keywords/pipeline","display_name":"Pipeline (software)","score":0.4562339782714844},{"id":"https://openalex.org/keywords/structured-light","display_name":"Structured light","score":0.4546237289905548},{"id":"https://openalex.org/keywords/computer-graphics","display_name":"Computer graphics (images)","score":0.3229341506958008},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.3003440499305725},{"id":"https://openalex.org/keywords/image","display_name":"Image (mathematics)","score":0.12514322996139526}],"concepts":[{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.607248842716217},{"id":"https://openalex.org/C182610534","wikidata":"https://www.wikidata.org/wiki/Q633620","display_name":"Ray","level":2,"score":0.5963805913925171},{"id":"https://openalex.org/C44365914","wikidata":"https://www.wikidata.org/wiki/Q17120636","display_name":"Photometric stereo","level":3,"score":0.5701520442962646},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.5312642455101013},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.5220015645027161},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5171977281570435},{"id":"https://openalex.org/C48983235","wikidata":"https://www.wikidata.org/wiki/Q593161","display_name":"Light field","level":2,"score":0.48706772923469543},{"id":"https://openalex.org/C43521106","wikidata":"https://www.wikidata.org/wiki/Q2165493","display_name":"Pipeline (software)","level":2,"score":0.4562339782714844},{"id":"https://openalex.org/C193581530","wikidata":"https://www.wikidata.org/wiki/Q683778","display_name":"Structured light","level":2,"score":0.4546237289905548},{"id":"https://openalex.org/C121684516","wikidata":"https://www.wikidata.org/wiki/Q7600677","display_name":"Computer graphics (images)","level":1,"score":0.3229341506958008},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.3003440499305725},{"id":"https://openalex.org/C115961682","wikidata":"https://www.wikidata.org/wiki/Q860623","display_name":"Image (mathematics)","level":2,"score":0.12514322996139526},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"pmh:oai:oai.crs4.it:123456789/34","is_oa":true,"landing_page_url":"http://www.crs4.it/vic/cgi-bin/bib-page.cgi?id=%27Pintus:2016:PFR%27","pdf_url":"http://www.crs4.it/vic/cgi-bin/bib-page.cgi?id=%27Pintus:2016:PFR%27","source":{"id":"https://openalex.org/S4377196923","display_name":"CRS4 Open Archive (Center for Advanced Studies Research and Development in Sardinia)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I2800759272","host_organization_name":"Center for Advanced Studies Research and Development in Sardinia","host_organization_lineage":["https://openalex.org/I2800759272"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Proc. Smart Tools and Apps for Graphics (STAG) 2016","raw_type":"info:eu-repo/semantics/article"},{"id":"doi:10.2312/stag.20161374","is_oa":true,"landing_page_url":"https://doi.org/10.2312/stag.20161374","pdf_url":null,"source":{"id":"https://openalex.org/S7407052899","display_name":"Eurographics","issn_l":null,"issn":[],"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":null,"raw_source_name":null,"raw_type":"article"}],"best_oa_location":{"id":"pmh:oai:oai.crs4.it:123456789/34","is_oa":true,"landing_page_url":"http://www.crs4.it/vic/cgi-bin/bib-page.cgi?id=%27Pintus:2016:PFR%27","pdf_url":"http://www.crs4.it/vic/cgi-bin/bib-page.cgi?id=%27Pintus:2016:PFR%27","source":{"id":"https://openalex.org/S4377196923","display_name":"CRS4 Open Archive (Center for Advanced Studies Research and Development in Sardinia)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I2800759272","host_organization_name":"Center for Advanced Studies Research and Development in Sardinia","host_organization_lineage":["https://openalex.org/I2800759272"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Proc. Smart Tools and Apps for Graphics (STAG) 2016","raw_type":"info:eu-repo/semantics/article"},"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":false},"content_urls":{"pdf":"https://content.openalex.org/works/W2529037988.pdf"},"referenced_works_count":30,"referenced_works":["https://openalex.org/W1495531663","https://openalex.org/W1607458528","https://openalex.org/W1618554863","https://openalex.org/W1809435202","https://openalex.org/W1951299147","https://openalex.org/W1966327116","https://openalex.org/W1971672988","https://openalex.org/W1972783872","https://openalex.org/W1975089519","https://openalex.org/W1988189382","https://openalex.org/W2007735572","https://openalex.org/W2025890843","https://openalex.org/W2051740346","https://openalex.org/W2066085919","https://openalex.org/W2074533561","https://openalex.org/W2085783904","https://openalex.org/W2092497893","https://openalex.org/W2121979942","https://openalex.org/W2129214397","https://openalex.org/W2152005177","https://openalex.org/W2163698597","https://openalex.org/W2164352162","https://openalex.org/W2207585345","https://openalex.org/W2248850040","https://openalex.org/W2253028467","https://openalex.org/W2288973411","https://openalex.org/W2318890316","https://openalex.org/W2408365086","https://openalex.org/W2515823398","https://openalex.org/W2523801679"],"related_works":["https://openalex.org/W2515823398","https://openalex.org/W2268982196","https://openalex.org/W2882867662","https://openalex.org/W2970653640","https://openalex.org/W2282447476","https://openalex.org/W2039496583","https://openalex.org/W2980720834","https://openalex.org/W3090431746","https://openalex.org/W2084673568","https://openalex.org/W2983278931","https://openalex.org/W1644006388","https://openalex.org/W3180212416","https://openalex.org/W3147276451","https://openalex.org/W2837407083","https://openalex.org/W2848041511","https://openalex.org/W2325664382","https://openalex.org/W2158726168","https://openalex.org/W1984132530","https://openalex.org/W3146126071","https://openalex.org/W1497943359"],"abstract_inverted_index":{"We":[0,33,154,241],"present":[1],"an":[2,250],"automated":[3],"light":[4,51,81,93,125,139,158,166,193,199],"calibration":[5],"pipeline":[6],"for":[7],"free-form":[8,70],"acquisition":[9,71],"of":[10,14,38,65,116,133,150,245],"shape":[11],"and":[12,142,195,210,232],"reflectance":[13,209,212],"objects":[15],"using":[16,97,160,170,215,236],"common":[17,69],"off-the-shelf":[18],"illuminators,":[19],"such":[20],"as":[21,257,259],"LED":[22],"lights,":[23],"that":[24,79,90,101],"can":[25,94],"be":[26,95],"placed":[27],"arbitrarily":[28],"close":[29],"to":[30,60,147,189],"the":[31,39,56,76,80,88,112,131,134,137,143,148,151,191,196,204,207,211,216,243,246],"objects.":[32],"acquire":[34],"multiple":[35],"digital":[36],"photographs":[37],"studied":[40],"object":[41,57,89,188],"shot":[42],"from":[43,87],"a":[44,50,62,117,121,161,184,229,237],"stationary":[45],"camera.":[46],"In":[47],"each":[48],"photograph,":[49],"is":[52,222],"freely":[53],"positioned":[54],"around":[55],"in":[58,108,174,224],"order":[59],"cover":[61],"wide":[63],"variety":[64],"illumination":[66,144],"directions.":[67],"While":[68],"approaches":[72],"are":[73,83,103,168],"based":[74,248],"on":[75,130,183,249,254,260],"simplifying":[77],"assumptions":[78],"sources":[82],"either":[84],"sufficiently":[85],"far":[86],"all":[91,156],"incoming":[92],"modeled":[96],"parallel":[98],"rays,":[99],"or":[100],"lights":[102],"local":[104,123],"points":[105],"emitting":[106],"uniformly":[107],"space,":[109],"we":[110,179,202],"use":[111],"more":[113],"realistic":[114],"model":[115],"scene":[118],"lit":[119],"by":[120,214],"moving":[122],"spot":[124,138,152,157,192,198],"with":[126],"exponential":[127],"fall-off":[128],"depending":[129],"cosine":[132],"angle":[135],"between":[136,206],"optical":[140,200],"axis":[141],"direction,":[145],"raised":[146],"power":[149],"exponent.":[153],"recover":[155,190],"parameters":[159],"multipass":[162],"numerical":[163],"method.":[164],"First,":[165],"positions":[167],"determined":[169],"standard":[171],"methods":[172],"used":[173],"photometric":[175],"stereo":[176],"approaches.":[177],"Then,":[178],"exploit":[180],"measures":[181],"taken":[182],"Lambertian":[185,218],"reference":[186],"planar":[187],"exponent":[194],"per-image":[197],"axis;":[201],"minimize":[203],"difference":[205],"observed":[208],"synthesized":[213],"near-field":[217],"equation.":[219],"The":[220],"optimization":[221],"performed":[223,253],"two":[225],"passes,":[226],"first":[227],"generating":[228],"starting":[230],"solution":[231],"then":[233],"refining":[234],"it":[235],"Levenberg-Marquardt":[238],"iterative":[239],"minimizer.":[240],"demonstrate":[242],"effectiveness":[244],"method":[247],"error":[251],"analysis":[252],"analytical":[255],"datasets,":[256],"well":[258],"real-world":[261],"experiments.":[262]},"counts_by_year":[{"year":2021,"cited_by_count":1},{"year":2018,"cited_by_count":1},{"year":2017,"cited_by_count":2}],"updated_date":"2026-04-04T16:13:02.066488","created_date":"2025-10-10T00:00:00"}