{"id":"https://openalex.org/W1977983109","doi":"https://doi.org/10.1016/0734-189x(90)90153-m","title":"Contour codes of isothetic polygons","display_name":"Contour codes of isothetic polygons","publication_year":1990,"publication_date":"1990-06-01","ids":{"openalex":"https://openalex.org/W1977983109","doi":"https://doi.org/10.1016/0734-189x(90)90153-m","mag":"1977983109"},"language":"en","primary_location":{"id":"doi:10.1016/0734-189x(90)90153-m","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0734-189x(90)90153-m","pdf_url":null,"source":{"id":"https://openalex.org/S4210212310","display_name":"Computer Vision Graphics and Image Processing","issn_l":"0734-189X","issn":["0734-189X","1557-895X"],"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/P4310319955","host_organization_name":"Academic Press","host_organization_lineage":["https://openalex.org/P4310319955","https://openalex.org/P4310320990"],"host_organization_lineage_names":["Academic Press","Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Computer Vision, Graphics, and Image Processing","raw_type":"journal-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/A5111872056","display_name":"Prabir Bhattacharya","orcid":null},"institutions":[{"id":"https://openalex.org/I114395901","display_name":"University of Nebraska\u2013Lincoln","ror":"https://ror.org/043mer456","country_code":"US","type":"education","lineage":["https://openalex.org/I114395901"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Prabir Bhattacharya","raw_affiliation_strings":["Department of Computer Science and Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0115, USA"],"affiliations":[{"raw_affiliation_string":"Department of Computer Science and Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0115, USA","institution_ids":["https://openalex.org/I114395901"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5110520108","display_name":"Azriel Rosenfeld","orcid":null},"institutions":[{"id":"https://openalex.org/I66946132","display_name":"University of Maryland, College Park","ror":"https://ror.org/047s2c258","country_code":"US","type":"education","lineage":["https://openalex.org/I66946132"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Azriel Rosenfeld","raw_affiliation_strings":["Center for Automation Research, University of Maryland, College Park, Maryland 20742-3411, USA","Center for Automation Research, University of Maryland, College Park, Maryland 20742-3411 USA"],"affiliations":[{"raw_affiliation_string":"Center for Automation Research, University of Maryland, College Park, Maryland 20742-3411, USA","institution_ids":["https://openalex.org/I66946132"]},{"raw_affiliation_string":"Center for Automation Research, University of Maryland, College Park, Maryland 20742-3411 USA","institution_ids":["https://openalex.org/I66946132"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5111872056"],"corresponding_institution_ids":["https://openalex.org/I114395901"],"apc_list":null,"apc_paid":null,"fwci":2.4204,"has_fulltext":false,"cited_by_count":9,"citation_normalized_percentile":{"value":0.88292333,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":"50","issue":"3","first_page":"353","last_page":"363"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12923","display_name":"Digital Image Processing Techniques","score":0.9947999715805054,"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/T12923","display_name":"Digital Image Processing Techniques","score":0.9947999715805054,"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/T11797","display_name":"graph theory and CDMA systems","score":0.9886000156402588,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11130","display_name":"Coding theory and cryptography","score":0.9828000068664551,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"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/arc","display_name":"Arc (geometry)","score":0.6758452653884888},{"id":"https://openalex.org/keywords/code","display_name":"Code (set theory)","score":0.6406630873680115},{"id":"https://openalex.org/keywords/combinatorics","display_name":"Combinatorics","score":0.6073802709579468},{"id":"https://openalex.org/keywords/sequence","display_name":"Sequence (biology)","score":0.5502094626426697},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.5223063826560974},{"id":"https://openalex.org/keywords/arc-length","display_name":"Arc length","score":0.48990386724472046},{"id":"https://openalex.org/keywords/congruence","display_name":"Congruence (geometry)","score":0.4415813088417053},{"id":"https://openalex.org/keywords/geometry","display_name":"Geometry","score":0.37681302428245544},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.3089510202407837}],"concepts":[{"id":"https://openalex.org/C83415579","wikidata":"https://www.wikidata.org/wiki/Q161973","display_name":"Arc (geometry)","level":2,"score":0.6758452653884888},{"id":"https://openalex.org/C2776760102","wikidata":"https://www.wikidata.org/wiki/Q5139990","display_name":"Code (set theory)","level":3,"score":0.6406630873680115},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.6073802709579468},{"id":"https://openalex.org/C2778112365","wikidata":"https://www.wikidata.org/wiki/Q3511065","display_name":"Sequence (biology)","level":2,"score":0.5502094626426697},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.5223063826560974},{"id":"https://openalex.org/C22251595","wikidata":"https://www.wikidata.org/wiki/Q670036","display_name":"Arc length","level":3,"score":0.48990386724472046},{"id":"https://openalex.org/C132074034","wikidata":"https://www.wikidata.org/wiki/Q154210","display_name":"Congruence (geometry)","level":2,"score":0.4415813088417053},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.37681302428245544},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.3089510202407837},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0},{"id":"https://openalex.org/C54355233","wikidata":"https://www.wikidata.org/wiki/Q7162","display_name":"Genetics","level":1,"score":0.0},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1016/0734-189x(90)90153-m","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0734-189x(90)90153-m","pdf_url":null,"source":{"id":"https://openalex.org/S4210212310","display_name":"Computer Vision Graphics and Image Processing","issn_l":"0734-189X","issn":["0734-189X","1557-895X"],"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/P4310319955","host_organization_name":"Academic Press","host_organization_lineage":["https://openalex.org/P4310319955","https://openalex.org/P4310320990"],"host_organization_lineage_names":["Academic Press","Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Computer Vision, Graphics, and Image Processing","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Sustainable cities and communities","score":0.6700000166893005,"id":"https://metadata.un.org/sdg/11"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":11,"referenced_works":["https://openalex.org/W1622620102","https://openalex.org/W1970608706","https://openalex.org/W1985936064","https://openalex.org/W2003938193","https://openalex.org/W2005314985","https://openalex.org/W2038104358","https://openalex.org/W2039562882","https://openalex.org/W2077092884","https://openalex.org/W2120292132","https://openalex.org/W2143723796","https://openalex.org/W3041834803"],"related_works":["https://openalex.org/W2373818241","https://openalex.org/W1967204917","https://openalex.org/W2368434553","https://openalex.org/W2092475372","https://openalex.org/W4248447025","https://openalex.org/W2482563509","https://openalex.org/W1994172230","https://openalex.org/W50580372","https://openalex.org/W145167312","https://openalex.org/W2364350605"],"abstract_inverted_index":null,"counts_by_year":[{"year":2020,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}