{"id":"https://openalex.org/W2093055813","doi":"https://doi.org/10.1109/icip.2012.6467019","title":"Image de-quantization via spatially varying sparsity prior","display_name":"Image de-quantization via spatially varying sparsity prior","publication_year":2012,"publication_date":"2012-09-01","ids":{"openalex":"https://openalex.org/W2093055813","doi":"https://doi.org/10.1109/icip.2012.6467019","mag":"2093055813"},"language":"en","primary_location":{"id":"doi:10.1109/icip.2012.6467019","is_oa":false,"landing_page_url":"https://doi.org/10.1109/icip.2012.6467019","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2012 19th IEEE International Conference on Image Processing","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5101928510","display_name":"Pengfei Wan","orcid":"https://orcid.org/0000-0001-7225-565X"},"institutions":[{"id":"https://openalex.org/I200769079","display_name":"Hong Kong University of Science and Technology","ror":"https://ror.org/00q4vv597","country_code":"HK","type":"education","lineage":["https://openalex.org/I200769079"]}],"countries":["HK"],"is_corresponding":true,"raw_author_name":"Pengfei Wan","raw_affiliation_strings":["Hong Kong University of Science and Technology, Hong Kong, China","The Hong Kong University of Science and Technology, Clear-Water Bay, Kowloon, Hong Kong#TAB#"],"affiliations":[{"raw_affiliation_string":"Hong Kong University of Science and Technology, Hong Kong, China","institution_ids":["https://openalex.org/I200769079"]},{"raw_affiliation_string":"The Hong Kong University of Science and Technology, Clear-Water Bay, Kowloon, Hong Kong#TAB#","institution_ids":["https://openalex.org/I200769079"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5010546001","display_name":"Oscar C. Au","orcid":null},"institutions":[{"id":"https://openalex.org/I200769079","display_name":"Hong Kong University of Science and Technology","ror":"https://ror.org/00q4vv597","country_code":"HK","type":"education","lineage":["https://openalex.org/I200769079"]}],"countries":["HK"],"is_corresponding":false,"raw_author_name":"Oscar C. Au","raw_affiliation_strings":["Hong Kong University of Science and Technology, Hong Kong, China","The Hong Kong University of Science and Technology, Clear-Water Bay, Kowloon, Hong Kong#TAB#"],"affiliations":[{"raw_affiliation_string":"Hong Kong University of Science and Technology, Hong Kong, China","institution_ids":["https://openalex.org/I200769079"]},{"raw_affiliation_string":"The Hong Kong University of Science and Technology, Clear-Water Bay, Kowloon, Hong Kong#TAB#","institution_ids":["https://openalex.org/I200769079"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5111982778","display_name":"Ketan Tang","orcid":null},"institutions":[{"id":"https://openalex.org/I200769079","display_name":"Hong Kong University of Science and Technology","ror":"https://ror.org/00q4vv597","country_code":"HK","type":"education","lineage":["https://openalex.org/I200769079"]}],"countries":["HK"],"is_corresponding":false,"raw_author_name":"Ketan Tang","raw_affiliation_strings":["Hong Kong University of Science and Technology, Hong Kong, China","The Hong Kong University of Science and Technology, Clear-Water Bay, Kowloon, Hong Kong#TAB#"],"affiliations":[{"raw_affiliation_string":"Hong Kong University of Science and Technology, Hong Kong, China","institution_ids":["https://openalex.org/I200769079"]},{"raw_affiliation_string":"The Hong Kong University of Science and Technology, Clear-Water Bay, Kowloon, Hong Kong#TAB#","institution_ids":["https://openalex.org/I200769079"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5030187602","display_name":"Yuanfang Guo","orcid":"https://orcid.org/0000-0003-4592-8083"},"institutions":[{"id":"https://openalex.org/I200769079","display_name":"Hong Kong University of Science and Technology","ror":"https://ror.org/00q4vv597","country_code":"HK","type":"education","lineage":["https://openalex.org/I200769079"]}],"countries":["HK"],"is_corresponding":false,"raw_author_name":"Yuanfang Guo","raw_affiliation_strings":["Hong Kong University of Science and Technology, Hong Kong, China","The Hong Kong University of Science and Technology, Clear-Water Bay, Kowloon, Hong Kong#TAB#"],"affiliations":[{"raw_affiliation_string":"Hong Kong University of Science and Technology, Hong Kong, China","institution_ids":["https://openalex.org/I200769079"]},{"raw_affiliation_string":"The Hong Kong University of Science and Technology, Clear-Water Bay, Kowloon, Hong Kong#TAB#","institution_ids":["https://openalex.org/I200769079"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5101928510"],"corresponding_institution_ids":["https://openalex.org/I200769079"],"apc_list":null,"apc_paid":null,"fwci":0.5491,"has_fulltext":false,"cited_by_count":16,"citation_normalized_percentile":{"value":0.69614301,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":98},"biblio":{"volume":"5292","issue":null,"first_page":"953","last_page":"956"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11105","display_name":"Advanced Image Processing Techniques","score":0.9998999834060669,"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/T11105","display_name":"Advanced Image Processing Techniques","score":0.9998999834060669,"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/T11019","display_name":"Image Enhancement Techniques","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/T13114","display_name":"Image Processing Techniques and Applications","score":0.9995999932289124,"subfield":{"id":"https://openalex.org/subfields/2214","display_name":"Media Technology"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/quantization","display_name":"Quantization (signal processing)","score":0.8664419651031494},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5460299849510193},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.5152997970581055},{"id":"https://openalex.org/keywords/image","display_name":"Image (mathematics)","score":0.5072019100189209},{"id":"https://openalex.org/keywords/iterative-reconstruction","display_name":"Iterative reconstruction","score":0.4671947956085205},{"id":"https://openalex.org/keywords/regular-polygon","display_name":"Regular polygon","score":0.4665047526359558},{"id":"https://openalex.org/keywords/computer-vision","display_name":"Computer vision","score":0.4486692547798157},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.44402816891670227},{"id":"https://openalex.org/keywords/convex-optimization","display_name":"Convex optimization","score":0.4391297399997711},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.3529818058013916}],"concepts":[{"id":"https://openalex.org/C28855332","wikidata":"https://www.wikidata.org/wiki/Q198099","display_name":"Quantization (signal processing)","level":2,"score":0.8664419651031494},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5460299849510193},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.5152997970581055},{"id":"https://openalex.org/C115961682","wikidata":"https://www.wikidata.org/wiki/Q860623","display_name":"Image (mathematics)","level":2,"score":0.5072019100189209},{"id":"https://openalex.org/C141379421","wikidata":"https://www.wikidata.org/wiki/Q6094427","display_name":"Iterative reconstruction","level":2,"score":0.4671947956085205},{"id":"https://openalex.org/C112680207","wikidata":"https://www.wikidata.org/wiki/Q714886","display_name":"Regular polygon","level":2,"score":0.4665047526359558},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.4486692547798157},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.44402816891670227},{"id":"https://openalex.org/C157972887","wikidata":"https://www.wikidata.org/wiki/Q463359","display_name":"Convex optimization","level":3,"score":0.4391297399997711},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.3529818058013916},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1109/icip.2012.6467019","is_oa":false,"landing_page_url":"https://doi.org/10.1109/icip.2012.6467019","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2012 19th IEEE International Conference on Image Processing","raw_type":"proceedings-article"},{"id":"pmh:oai:repository.hkust.edu.hk:1783.1-56223","is_oa":false,"landing_page_url":"http://repository.hkust.edu.hk/ir/Record/1783.1-56223","pdf_url":null,"source":{"id":"https://openalex.org/S4306401796","display_name":"Rare & Special e-Zone (The Hong Kong University of Science and Technology)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I200769079","host_organization_name":"Hong Kong University of Science and Technology","host_organization_lineage":["https://openalex.org/I200769079"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Conference paper"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":7,"referenced_works":["https://openalex.org/W592218210","https://openalex.org/W1481384265","https://openalex.org/W1970112334","https://openalex.org/W1998371349","https://openalex.org/W2016278923","https://openalex.org/W2133665775","https://openalex.org/W2135726055"],"related_works":["https://openalex.org/W2114837856","https://openalex.org/W2979160909","https://openalex.org/W2359364609","https://openalex.org/W4386322429","https://openalex.org/W3212911258","https://openalex.org/W3206280435","https://openalex.org/W2952965081","https://openalex.org/W2963480671","https://openalex.org/W2291007869","https://openalex.org/W3153752017"],"abstract_inverted_index":{"We":[0,48],"address":[1],"the":[2,15,41,58],"problem":[3],"of":[4,45],"image":[5,29,46,53],"de-quantization,":[6],"which":[7,39],"is":[8,19,37],"also":[9],"known":[10],"as":[11],"bit-depth":[12,54],"expansion":[13,55],"if":[14],"reconstructed":[16],"2D":[17],"signal":[18],"re-quantized":[20],"into":[21],"higher":[22],"bit-precision.":[23],"In":[24],"this":[25],"paper,":[26],"a":[27],"novel":[28],"de-quantization":[30],"method":[31,51,64],"based":[32],"on":[33,52],"convex":[34],"optimization":[35],"theory":[36],"proposed,":[38],"exploits":[40],"spatially":[42],"varying":[43],"characteristics":[44],"surface.":[47],"test":[49],"our":[50],"problems,":[56],"and":[57,69],"experimental":[59],"results":[60],"show":[61],"that":[62],"proposed":[63],"can":[65],"achieve":[66],"superior":[67],"PSNR":[68],"SSIM":[70],"performance.":[71]},"counts_by_year":[{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":1},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":1},{"year":2019,"cited_by_count":4},{"year":2018,"cited_by_count":3},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":2},{"year":2015,"cited_by_count":1},{"year":2014,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}