{"id":"https://openalex.org/W2112349173","doi":"https://doi.org/10.1109/cvpr.2003.1211513","title":"Document image enhancement using directional wavelet","display_name":"Document image enhancement using directional wavelet","publication_year":2003,"publication_date":"2003-11-20","ids":{"openalex":"https://openalex.org/W2112349173","doi":"https://doi.org/10.1109/cvpr.2003.1211513","mag":"2112349173"},"language":"en","primary_location":{"id":"doi:10.1109/cvpr.2003.1211513","is_oa":false,"landing_page_url":"https://doi.org/10.1109/cvpr.2003.1211513","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2003 IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2003. Proceedings.","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/A5100391116","display_name":"Qian Wang","orcid":"https://orcid.org/0000-0002-8967-8525"},"institutions":[{"id":"https://openalex.org/I165932596","display_name":"National University of Singapore","ror":"https://ror.org/01tgyzw49","country_code":"SG","type":"education","lineage":["https://openalex.org/I165932596"]}],"countries":["SG"],"is_corresponding":true,"raw_author_name":"Qian Wang","raw_affiliation_strings":["Department of Computer Science, National University of Singapore, Singapore,"],"affiliations":[{"raw_affiliation_string":"Department of Computer Science, National University of Singapore, Singapore,","institution_ids":["https://openalex.org/I165932596"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5108519193","display_name":"Tao Xia","orcid":null},"institutions":[{"id":"https://openalex.org/I165932596","display_name":"National University of Singapore","ror":"https://ror.org/01tgyzw49","country_code":"SG","type":"education","lineage":["https://openalex.org/I165932596"]}],"countries":["SG"],"is_corresponding":false,"raw_author_name":"Tao Xia","raw_affiliation_strings":["National University of Singapore"],"affiliations":[{"raw_affiliation_string":"National University of Singapore","institution_ids":["https://openalex.org/I165932596"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5013811510","display_name":"Lida Li","orcid":null},"institutions":[{"id":"https://openalex.org/I165932596","display_name":"National University of Singapore","ror":"https://ror.org/01tgyzw49","country_code":"SG","type":"education","lineage":["https://openalex.org/I165932596"]}],"countries":["SG"],"is_corresponding":false,"raw_author_name":"Lida Li","raw_affiliation_strings":["National University of Singapore"],"affiliations":[{"raw_affiliation_string":"National University of Singapore","institution_ids":["https://openalex.org/I165932596"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5109209523","display_name":"Chew\u2010Lim Tan","orcid":null},"institutions":[{"id":"https://openalex.org/I165932596","display_name":"National University of Singapore","ror":"https://ror.org/01tgyzw49","country_code":"SG","type":"education","lineage":["https://openalex.org/I165932596"]}],"countries":["SG"],"is_corresponding":false,"raw_author_name":"Chew Lim Tan","raw_affiliation_strings":["National University of Singapore"],"affiliations":[{"raw_affiliation_string":"National University of Singapore","institution_ids":["https://openalex.org/I165932596"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5100391116"],"corresponding_institution_ids":["https://openalex.org/I165932596"],"apc_list":null,"apc_paid":null,"fwci":1.6151,"has_fulltext":false,"cited_by_count":42,"citation_normalized_percentile":{"value":0.8472302,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":98},"biblio":{"volume":"2","issue":null,"first_page":"II","last_page":"534"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10688","display_name":"Image and Signal Denoising Methods","score":0.9995999932289124,"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/T10688","display_name":"Image and Signal Denoising Methods","score":0.9995999932289124,"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/T10052","display_name":"Medical Image Segmentation Techniques","score":0.9911999702453613,"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":0.9904999732971191,"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/computer-science","display_name":"Computer science","score":0.624857485294342},{"id":"https://openalex.org/keywords/wavelet","display_name":"Wavelet","score":0.6061895489692688},{"id":"https://openalex.org/keywords/computer-vision","display_name":"Computer vision","score":0.5314109921455383},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.5040606260299683},{"id":"https://openalex.org/keywords/image","display_name":"Image (mathematics)","score":0.48071983456611633},{"id":"https://openalex.org/keywords/wavelet-transform","display_name":"Wavelet transform","score":0.45477646589279175},{"id":"https://openalex.org/keywords/image-enhancement","display_name":"Image enhancement","score":0.4281834363937378},{"id":"https://openalex.org/keywords/pattern-recognition","display_name":"Pattern recognition (psychology)","score":0.3494781255722046}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.624857485294342},{"id":"https://openalex.org/C47432892","wikidata":"https://www.wikidata.org/wiki/Q831390","display_name":"Wavelet","level":2,"score":0.6061895489692688},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.5314109921455383},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.5040606260299683},{"id":"https://openalex.org/C115961682","wikidata":"https://www.wikidata.org/wiki/Q860623","display_name":"Image (mathematics)","level":2,"score":0.48071983456611633},{"id":"https://openalex.org/C196216189","wikidata":"https://www.wikidata.org/wiki/Q2867","display_name":"Wavelet transform","level":3,"score":0.45477646589279175},{"id":"https://openalex.org/C3017601658","wikidata":"https://www.wikidata.org/wiki/Q545981","display_name":"Image enhancement","level":3,"score":0.4281834363937378},{"id":"https://openalex.org/C153180895","wikidata":"https://www.wikidata.org/wiki/Q7148389","display_name":"Pattern recognition (psychology)","level":2,"score":0.3494781255722046}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1109/cvpr.2003.1211513","is_oa":false,"landing_page_url":"https://doi.org/10.1109/cvpr.2003.1211513","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2003 IEEE Computer Society Conference on Computer Vision and Pattern Recognition, 2003. Proceedings.","raw_type":"proceedings-article"},{"id":"pmh:oai:scholarbank.nus.edu.sg:10635/115403","is_oa":false,"landing_page_url":"http://scholarbank.nus.edu.sg/handle/10635/115403","pdf_url":null,"source":{"id":"https://openalex.org/S7407052290","display_name":"National University of Singapore","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":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Scopus","raw_type":"Conference Paper"},{"id":"pmh:oai:CiteSeerX.psu:10.1.1.123.5812","is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.123.5812","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://www.comp.nus.edu.sg/~tancl/Papers/CVPR03/cvpr2003-wq.pdf","raw_type":"text"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Peace, Justice and strong institutions","id":"https://metadata.un.org/sdg/16","score":0.5099999904632568}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":18,"referenced_works":["https://openalex.org/W59771946","https://openalex.org/W1486250207","https://openalex.org/W1600276254","https://openalex.org/W2011116671","https://openalex.org/W2062024414","https://openalex.org/W2115069014","https://openalex.org/W2115755118","https://openalex.org/W2126682098","https://openalex.org/W2140595684","https://openalex.org/W2142176892","https://openalex.org/W2142316435","https://openalex.org/W2159872370","https://openalex.org/W2170709565","https://openalex.org/W4234054369","https://openalex.org/W4255272544","https://openalex.org/W6602487499","https://openalex.org/W6677459139","https://openalex.org/W6680678602"],"related_works":["https://openalex.org/W2382174632","https://openalex.org/W2129959498","https://openalex.org/W2784060934","https://openalex.org/W2902714807","https://openalex.org/W2537489131","https://openalex.org/W2949816130","https://openalex.org/W2034755188","https://openalex.org/W4362679294","https://openalex.org/W4375869153","https://openalex.org/W2088882750"],"abstract_inverted_index":{"This":[0],"paper":[1],"proposes":[2],"a":[3,9,59,79,119],"novel":[4],"algorithm":[5],"to":[6,24,54,61,72,88,110,126],"clean":[7],"up":[8],"large":[10],"collection":[11],"of":[12,21,27,32,37,58,78,151],"historical":[13],"handwritten":[14],"documents":[15],"kept":[16],"in":[17],"the":[18,25,34,45,63,68,76,128,137,145,149,156,161],"National":[19],"Archives":[20],"Singapore.":[22],"Due":[23],"seepage":[26],"ink":[28],"over":[29],"long":[30],"period":[31],"storage,":[33],"front":[35],"page":[36,60],"each":[38,152],"document":[39,89,153],"has":[40],"been":[41,52],"severely":[42],"marred":[43],"by":[44,117],"reverse":[46,96,131,167],"side":[47,97,115,132],"writing.":[48],"Earlier":[49],"attempts":[50],"have":[51,142],"made":[53],"match":[55],"both":[56],"sides":[57],"identify":[62],"offending":[64],"strokes":[65,133],"originating":[66],"from":[67],"back":[69],"so":[70],"as":[71],"eliminate":[73],"them":[74],"with":[75,113,165],"aid":[77],"wavelet":[80,121,139,158],"transform.":[81,140],"Perfect":[82],"matching,":[83],"however,":[84],"is":[85,107,124],"difficult":[86],"due":[87],"skews,":[90],"differing":[91],"resolutions,":[92],"inadvertently":[93],"missing":[94],"out":[95],"and":[98,130],"warped":[99],"pages":[100],"during":[101],"image":[102],"capture.":[103],"A":[104],"new":[105],"approach":[106],"now":[108],"proposed":[109],"do":[111],"away":[112],"double":[114],"mapping":[116,164],"using":[118],"directional":[120,157],"transform":[122],"that":[123,144],"able":[125],"distinguish":[127],"foreground":[129],"much":[134],"better":[135],"than":[136],"conventional":[138],"Experiments":[141],"shown":[143],"method":[146],"indeed":[147],"enhances":[148],"readability":[150],"significantly":[154],"after":[155],"operation":[159],"without":[160],"need":[162],"for":[163],"its":[166],"side.":[168],"1.":[169]},"counts_by_year":[{"year":2024,"cited_by_count":1},{"year":2021,"cited_by_count":1},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":1},{"year":2017,"cited_by_count":2},{"year":2015,"cited_by_count":1},{"year":2013,"cited_by_count":4},{"year":2012,"cited_by_count":4}],"updated_date":"2026-04-04T16:13:02.066488","created_date":"2025-10-10T00:00:00"}
