{"id":"https://openalex.org/W7220929092","doi":"https://doi.org/10.1109/cvprf71909.2026.00056","title":"HiDiGen: Hierarchical Diffusion for B-Rep Generation with Explicit Topological Constraints","display_name":"HiDiGen: Hierarchical Diffusion for B-Rep Generation with Explicit Topological Constraints","publication_year":2026,"publication_date":"2026-06-01","ids":{"openalex":"https://openalex.org/W7220929092","doi":"https://doi.org/10.1109/cvprf71909.2026.00056"},"language":"en","primary_location":{"id":"doi:10.1109/cvprf71909.2026.00056","doi":"https://doi.org/10.1109/cvprf71909.2026.00056","is_oa":true,"landing_page_url":"https://doi.org/10.1109/cvprf71909.2026.00056","pdf_url":null,"source":null,"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2026 IEEE/CVF Conference on Computer Vision and Pattern Recognition- FINDINGS Track (CVPRF)","raw_type":"proceedings-article"},"volume":null,"type":"conference-paper","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://doi.org/10.1109/cvprf71909.2026.00056","any_repository_has_fulltext":null},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5133003209","display_name":"Shurui Liu","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I157773358","display_name":"Sun Yat-sen University","ror":"https://ror.org/0064kty71","country_code":"CN","type":"education","lineage":["https://openalex.org/I157773358"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Shurui Liu","raw_affiliation_strings":["School of Computer Science and Engineering, Sun Yat-sen University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Computer Science and Engineering, Sun Yat-sen University","institution_ids":["https://openalex.org/I157773358"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5159261449","display_name":"Weide Chen","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I157773358","display_name":"Sun Yat-sen University","ror":"https://ror.org/0064kty71","country_code":"CN","type":"education","lineage":["https://openalex.org/I157773358"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Weide Chen","raw_affiliation_strings":["School of Intelligent Systems Engineering, Shenzhen Campus of Sun Yat-sen University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Intelligent Systems Engineering, Shenzhen Campus of Sun Yat-sen University","institution_ids":["https://openalex.org/I157773358"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5049519486","display_name":"Ancong Wu","orcid":"https://orcid.org/0000-0002-7969-3190","observed_orcids":["https://orcid.org/0000-0002-7969-3190"]},"institutions":[{"id":"https://openalex.org/I157773358","display_name":"Sun Yat-sen University","ror":"https://ror.org/0064kty71","country_code":"CN","type":"education","lineage":["https://openalex.org/I157773358"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Ancong Wu","raw_affiliation_strings":["School of Computer Science and Engineering, Sun Yat-sen University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Computer Science and Engineering, Sun Yat-sen University","institution_ids":["https://openalex.org/I157773358"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I157773358"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":{"value":0.0,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"538","last_page":"546"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10719","display_name":"3D Shape Modeling and Analysis","score":0.9980000257492065,"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"}},"topics":[{"id":"https://openalex.org/T10719","display_name":"3D Shape Modeling and Analysis","score":0.9980000257492065,"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"}},{"id":"https://openalex.org/T10996","display_name":"Computational Geometry and Mesh Generation","score":0.0005000000237487257,"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"}},{"id":"https://openalex.org/T10775","display_name":"Generative Adversarial Networks and Image Synthesis","score":0.00039999998989515007,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/boundary-representation","display_name":"boundary representation","score":0.9229999780654907},{"id":"https://openalex.org/keywords/hierarchical-diffusion","display_name":"hierarchical diffusion","score":0.6880000233650208},{"id":"https://openalex.org/keywords/topological-constraints","display_name":"topological constraints","score":0.9070000052452087},{"id":"https://openalex.org/keywords/3d-shape-generation","display_name":"3D shape generation","score":0.8199999928474426}],"concepts":[{"id":"https://openalex.org/C184720557","wikidata":"https://www.wikidata.org/wiki/Q7825049","display_name":"Topology (electrical circuits)","level":2,"score":0.5054000020027161},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.4426000118255615},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.41679999232292175},{"id":"https://openalex.org/C69357855","wikidata":"https://www.wikidata.org/wiki/Q163214","display_name":"Diffusion","level":2,"score":0.28769999742507935},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.2842000126838684},{"id":"https://openalex.org/C2776036281","wikidata":"https://www.wikidata.org/wiki/Q48769818","display_name":"Constraint (computer-aided design)","level":2,"score":0.28130000829696655},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.2718000113964081},{"id":"https://openalex.org/C2776359362","wikidata":"https://www.wikidata.org/wiki/Q2145286","display_name":"Representation (politics)","level":3,"score":0.2696000039577484},{"id":"https://openalex.org/C2778112365","wikidata":"https://www.wikidata.org/wiki/Q3511065","display_name":"Sequence (biology)","level":2,"score":0.26579999923706055},{"id":"https://openalex.org/C61797465","wikidata":"https://www.wikidata.org/wiki/Q1188986","display_name":"Term (time)","level":2,"score":0.2653000056743622},{"id":"https://openalex.org/C2777212361","wikidata":"https://www.wikidata.org/wiki/Q5127848","display_name":"Class (philosophy)","level":2,"score":0.2605000138282776},{"id":"https://openalex.org/C2779343474","wikidata":"https://www.wikidata.org/wiki/Q3109175","display_name":"Context (archaeology)","level":2,"score":0.25920000672340393},{"id":"https://openalex.org/C112972136","wikidata":"https://www.wikidata.org/wiki/Q7595718","display_name":"Stability (learning theory)","level":2,"score":0.25699999928474426}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/cvprf71909.2026.00056","doi":"https://doi.org/10.1109/cvprf71909.2026.00056","is_oa":true,"landing_page_url":"https://doi.org/10.1109/cvprf71909.2026.00056","pdf_url":null,"source":null,"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2026 IEEE/CVF Conference on Computer Vision and Pattern Recognition- FINDINGS Track (CVPRF)","raw_type":"proceedings-article"}],"best_oa_location":{"id":"doi:10.1109/cvprf71909.2026.00056","doi":"https://doi.org/10.1109/cvprf71909.2026.00056","is_oa":true,"landing_page_url":"https://doi.org/10.1109/cvprf71909.2026.00056","pdf_url":null,"source":null,"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2026 IEEE/CVF Conference on Computer Vision and Pattern Recognition- FINDINGS Track (CVPRF)","raw_type":"proceedings-article"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":14,"referenced_works":["https://openalex.org/W2088157800","https://openalex.org/W2904866874","https://openalex.org/W3096092761","https://openalex.org/W3162843412","https://openalex.org/W3185376398","https://openalex.org/W3217122878","https://openalex.org/W4286611065","https://openalex.org/W4313034350","https://openalex.org/W4366977572","https://openalex.org/W4400819112","https://openalex.org/W4412613749","https://openalex.org/W4412673754","https://openalex.org/W4413147724","https://openalex.org/W4413155680"],"related_works":["https://openalex.org/W4400819112","https://openalex.org/W7203727064","https://openalex.org/W7171413256","https://openalex.org/W2716568338","https://openalex.org/W4412613749","https://openalex.org/W4412588561","https://openalex.org/W7100310728","https://openalex.org/W4417363541","https://openalex.org/W1519900219","https://openalex.org/W4412673754"],"abstract_inverted_index":{"Boundary":[0],"representation":[1],"($B$-rep)":[2],"is":[3],"the":[4,32,98,124],"standard":[5],"3D":[6],"modeling":[7,24,54,135],"format":[8],"in":[9],"CAD":[10,153],"systems,":[11],"encoding":[12],"both":[13],"geometric":[14],"primitives":[15],"and":[16,38,83,105,113,129,150],"topological":[17,63,77,134],"connectivity.":[18],"Despite":[19],"its":[20],"prevalence,":[21],"deep":[22],"generative":[23],"of":[25,126],"valid$B$-rep":[26],"structures":[27],"remains":[28],"challenging":[29],"due":[30],"to":[31,73,96,115],"intricate":[33],"interplay":[34],"between":[35],"discrete":[36],"topology":[37],"continuous":[39],"geometry.":[40],"In":[41],"this":[42],"paper,":[43],"we":[44],"propose":[45],"HiDiGen,":[46],"a":[47,75],"hierarchical":[48],"generation":[49,125],"framework":[50],"that":[51,142],"decouples":[52],"geometry":[53,99,121],"into":[55],"two":[56],"stages,":[57],"each":[58],"guided":[59],"by":[60,100],"explicitly":[61],"modeled":[62],"constraints.":[64],"Specifically,":[65],"our":[66],"approach":[67],"first":[68],"establishes":[69],"face-edge":[70],"incidence":[71],"relations":[72],"define":[74],"coherent":[76],"scaffold,":[78],"upon":[79],"which":[80],"face":[81,103],"proxies":[82],"initial":[84],"edge":[85],"curves":[86],"are":[87,94],"generated.":[88],"Subsequently,":[89],"multiple":[90],"Transformer-based":[91],"diffusion":[92],"modules":[93],"employed":[95],"refine":[97],"generating":[101,147],"precise":[102],"surfaces":[104],"vertex":[106],"positions,":[107],"with":[108],"edge-vertex":[109],"adjacencies":[110],"dynamically":[111],"established":[112],"enforced":[114],"preserve":[116],"structural":[117],"consistency.":[118],"This":[119],"progressive":[120],"hierarchy":[122],"enables":[123],"more":[127],"novel":[128],"diverse":[130],"shapes,":[131],"while":[132],"twostage":[133],"ensures":[136],"high":[137],"validity.":[138],"Experimental":[139],"results":[140],"show":[141],"HiDiGen":[143],"achieves":[144],"strong":[145],"performance,":[146],"novel,":[148],"diverse,":[149],"topologically":[151],"sound":[152],"models.":[154]},"counts_by_year":[],"updated_date":"2026-11-08T12:12:28.789561","created_date":"2026-10-09T00:00:00"}