{"id":"https://openalex.org/W1967619758","doi":"https://doi.org/10.1109/igarss.2015.7326135","title":"A fast alternative for the pixel purity index algorithm","display_name":"A fast alternative for the pixel purity index algorithm","publication_year":2015,"publication_date":"2015-07-01","ids":{"openalex":"https://openalex.org/W1967619758","doi":"https://doi.org/10.1109/igarss.2015.7326135","mag":"1967619758"},"language":"en","primary_location":{"id":"doi:10.1109/igarss.2015.7326135","is_oa":false,"landing_page_url":"https://doi.org/10.1109/igarss.2015.7326135","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)","raw_type":"proceedings-article"},"type":"conference-paper","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/A5048918209","display_name":"Rob Heylen","orcid":"https://orcid.org/0000-0002-8341-9397"},"institutions":[{"id":"https://openalex.org/I149213910","display_name":"University of Antwerp","ror":"https://ror.org/008x57b05","country_code":"BE","type":"education","lineage":["https://openalex.org/I149213910"]},{"id":"https://openalex.org/I39327780","display_name":"iMinds","ror":"https://ror.org/03baec336","country_code":"BE","type":"nonprofit","lineage":["https://openalex.org/I39327780"]}],"countries":["BE"],"is_corresponding":false,"raw_author_name":"Rob Heylen","raw_affiliation_strings":["IMinds-Visionlab, University of Antwerp, Wilrijk, Antwerp, Belgium","IMinds-Visionlab, University of Antwerp, Universiteitsplein 1, Building N, B-2610 Wilrijk (Antwerp), Belgium"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"IMinds-Visionlab, University of Antwerp, Wilrijk, Antwerp, Belgium","institution_ids":["https://openalex.org/I149213910","https://openalex.org/I39327780"]},{"raw_affiliation_string":"IMinds-Visionlab, University of Antwerp, Universiteitsplein 1, Building N, B-2610 Wilrijk (Antwerp), Belgium","institution_ids":["https://openalex.org/I149213910"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5113841598","display_name":"Muhammad Awais Akhter","orcid":null},"institutions":[{"id":"https://openalex.org/I149213910","display_name":"University of Antwerp","ror":"https://ror.org/008x57b05","country_code":"BE","type":"education","lineage":["https://openalex.org/I149213910"]},{"id":"https://openalex.org/I39327780","display_name":"iMinds","ror":"https://ror.org/03baec336","country_code":"BE","type":"nonprofit","lineage":["https://openalex.org/I39327780"]}],"countries":["BE"],"is_corresponding":false,"raw_author_name":"Muhammad Awais Akhter","raw_affiliation_strings":["IMinds-Visionlab, University of Antwerp, Wilrijk, Antwerp, Belgium","IMinds-Visionlab, University of Antwerp, Universiteitsplein 1, Building N, B-2610 Wilrijk (Antwerp), Belgium"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"IMinds-Visionlab, University of Antwerp, Wilrijk, Antwerp, Belgium","institution_ids":["https://openalex.org/I149213910","https://openalex.org/I39327780"]},{"raw_affiliation_string":"IMinds-Visionlab, University of Antwerp, Universiteitsplein 1, Building N, B-2610 Wilrijk (Antwerp), Belgium","institution_ids":["https://openalex.org/I149213910"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5009310543","display_name":"Paul Scheunders","orcid":"https://orcid.org/0000-0003-2447-4772"},"institutions":[{"id":"https://openalex.org/I149213910","display_name":"University of Antwerp","ror":"https://ror.org/008x57b05","country_code":"BE","type":"education","lineage":["https://openalex.org/I149213910"]},{"id":"https://openalex.org/I39327780","display_name":"iMinds","ror":"https://ror.org/03baec336","country_code":"BE","type":"nonprofit","lineage":["https://openalex.org/I39327780"]}],"countries":["BE"],"is_corresponding":false,"raw_author_name":"Paul Scheunders","raw_affiliation_strings":["IMinds-Visionlab, University of Antwerp, Wilrijk, Antwerp, Belgium","IMinds-Visionlab, University of Antwerp, Universiteitsplein 1, Building N, B-2610 Wilrijk (Antwerp), Belgium"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"IMinds-Visionlab, University of Antwerp, Wilrijk, Antwerp, Belgium","institution_ids":["https://openalex.org/I149213910","https://openalex.org/I39327780"]},{"raw_affiliation_string":"IMinds-Visionlab, University of Antwerp, Universiteitsplein 1, Building N, B-2610 Wilrijk (Antwerp), Belgium","institution_ids":["https://openalex.org/I149213910"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":2,"citation_normalized_percentile":{"value":0.07764075,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":null,"issue":null,"first_page":"1781","last_page":"1784"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10500","display_name":"Sparse and Compressive Sensing Techniques","score":0.998199999332428,"subfield":{"id":"https://openalex.org/subfields/2206","display_name":"Computational Mechanics"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10500","display_name":"Sparse and Compressive Sensing Techniques","score":0.998199999332428,"subfield":{"id":"https://openalex.org/subfields/2206","display_name":"Computational Mechanics"},"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/T10689","display_name":"Remote-Sensing Image Classification","score":0.9977999925613403,"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"}},{"id":"https://openalex.org/T10627","display_name":"Advanced Image and Video Retrieval Techniques","score":0.9861999750137329,"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/algorithm","display_name":"Algorithm","score":0.7470942735671997},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6567795276641846},{"id":"https://openalex.org/keywords/focus","display_name":"Focus (optics)","score":0.5719146132469177},{"id":"https://openalex.org/keywords/output-sensitive-algorithm","display_name":"Output-sensitive algorithm","score":0.5456684827804565},{"id":"https://openalex.org/keywords/algorithm-design","display_name":"Algorithm design","score":0.5046323537826538},{"id":"https://openalex.org/keywords/matlab","display_name":"MATLAB","score":0.4914659261703491},{"id":"https://openalex.org/keywords/dimension","display_name":"Dimension (graph theory)","score":0.4585719704627991},{"id":"https://openalex.org/keywords/pixel","display_name":"Pixel","score":0.45048049092292786},{"id":"https://openalex.org/keywords/convex-hull","display_name":"Convex hull","score":0.43063458800315857},{"id":"https://openalex.org/keywords/index","display_name":"Index (typography)","score":0.4221060872077942},{"id":"https://openalex.org/keywords/regular-polygon","display_name":"Regular polygon","score":0.29864180088043213},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.2302568256855011},{"id":"https://openalex.org/keywords/convex-combination","display_name":"Convex combination","score":0.1804259717464447},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.17166516184806824},{"id":"https://openalex.org/keywords/convex-optimization","display_name":"Convex optimization","score":0.116597980260849}],"concepts":[{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.7470942735671997},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6567795276641846},{"id":"https://openalex.org/C192209626","wikidata":"https://www.wikidata.org/wiki/Q190909","display_name":"Focus (optics)","level":2,"score":0.5719146132469177},{"id":"https://openalex.org/C39132409","wikidata":"https://www.wikidata.org/wiki/Q7112860","display_name":"Output-sensitive algorithm","level":5,"score":0.5456684827804565},{"id":"https://openalex.org/C106516650","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm design","level":2,"score":0.5046323537826538},{"id":"https://openalex.org/C2780365114","wikidata":"https://www.wikidata.org/wiki/Q169478","display_name":"MATLAB","level":2,"score":0.4914659261703491},{"id":"https://openalex.org/C33676613","wikidata":"https://www.wikidata.org/wiki/Q13415176","display_name":"Dimension (graph theory)","level":2,"score":0.4585719704627991},{"id":"https://openalex.org/C160633673","wikidata":"https://www.wikidata.org/wiki/Q355198","display_name":"Pixel","level":2,"score":0.45048049092292786},{"id":"https://openalex.org/C206194317","wikidata":"https://www.wikidata.org/wiki/Q1138624","display_name":"Convex hull","level":3,"score":0.43063458800315857},{"id":"https://openalex.org/C2777382242","wikidata":"https://www.wikidata.org/wiki/Q6017816","display_name":"Index (typography)","level":2,"score":0.4221060872077942},{"id":"https://openalex.org/C112680207","wikidata":"https://www.wikidata.org/wiki/Q714886","display_name":"Regular polygon","level":2,"score":0.29864180088043213},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.2302568256855011},{"id":"https://openalex.org/C111110010","wikidata":"https://www.wikidata.org/wiki/Q2627315","display_name":"Convex combination","level":4,"score":0.1804259717464447},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.17166516184806824},{"id":"https://openalex.org/C157972887","wikidata":"https://www.wikidata.org/wiki/Q463359","display_name":"Convex optimization","level":3,"score":0.116597980260849},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.0},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0},{"id":"https://openalex.org/C202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","level":1,"score":0.0},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/igarss.2015.7326135","is_oa":false,"landing_page_url":"https://doi.org/10.1109/igarss.2015.7326135","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)","raw_type":"proceedings-article"}],"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/W1582058549","https://openalex.org/W2046694687","https://openalex.org/W2058144644","https://openalex.org/W2153504150","https://openalex.org/W2170395949","https://openalex.org/W2533012756","https://openalex.org/W6634825034"],"related_works":["https://openalex.org/W2360117020","https://openalex.org/W1786647412","https://openalex.org/W2741067195","https://openalex.org/W2358001426","https://openalex.org/W2439874932","https://openalex.org/W2376290243","https://openalex.org/W1572664488","https://openalex.org/W1987576325","https://openalex.org/W3034791572","https://openalex.org/W1968489927"],"abstract_inverted_index":{"We":[0],"present":[1],"a":[2,85,99],"fast":[3],"alternative":[4],"for":[5],"the":[6,38,51,56,75,89],"popular":[7],"pixel":[8],"purity":[9],"index":[10],"(PPI)":[11],"algorithm.":[12,76],"This":[13],"multi-dimensional":[14],"PPI":[15,39,52,91],"(MDPPI)":[16],"algorithm":[17,32,53,58,92],"is":[18,54],"based":[19],"on":[20,69],"iteratively":[21],"identifying":[22],"convex":[23],"hull":[24],"indices":[25],"in":[26,60],"low-dimensional":[27],"random":[28],"projections.":[29],"The":[30],"MDPPI":[31,57],"can":[33,81],"yield":[34],"identical":[35],"results":[36],"as":[37,84],"algorithm,":[40],"but":[41],"several":[42],"orders":[43],"of":[44,74,88],"magnitude":[45],"faster.":[46],"Furthermore,":[47],"we":[48,66],"show":[49],"that":[50],"simply":[55],"used":[59,83],"one":[61],"dimension.":[62],"In":[63],"this":[64],"work,":[65],"focus":[67],"mainly":[68],"an":[70],"efficient":[71],"computational":[72],"implementation":[73,79],"An":[77],"ENVI":[78],"which":[80],"be":[82,94],"drop-in":[86],"replacement":[87],"standard":[90],"will":[93],"made":[95],"available,":[96],"along":[97],"with":[98],"Matlab":[100],"implementation.":[101]},"counts_by_year":[{"year":2020,"cited_by_count":1},{"year":2019,"cited_by_count":1}],"updated_date":"2026-07-29T14:22:42.915294","created_date":"2025-10-10T00:00:00"}
