{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,6]],"date-time":"2026-02-06T04:17:18Z","timestamp":1770351438177,"version":"3.49.0"},"reference-count":20,"publisher":"Elsevier BV","issue":"2","license":[{"start":{"date-parts":[[1989,1,1]],"date-time":"1989-01-01T00:00:00Z","timestamp":599616000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Computers & Graphics"],"published-print":{"date-parts":[[1989,1]]},"DOI":"10.1016\/0097-8493(89)90058-7","type":"journal-article","created":{"date-parts":[[2003,8,7]],"date-time":"2003-08-07T23:49:30Z","timestamp":1060300170000},"page":"159-166","source":"Crossref","is-referenced-by-count":141,"title":["A digital fundamental group"],"prefix":"10.1016","volume":"13","author":[{"given":"T.Y.","family":"Kong","sequence":"first","affiliation":[]}],"member":"78","reference":[{"key":"10.1016\/0097-8493(89)90058-7_BIB1","series-title":"Proceedings of the 1987 IEEE International Conference on Systems. Man and Cybernetics","first-page":"227","article-title":"Motion, deformation and homotopy in finite spaces","author":"Khalimsky","year":"1987"},{"key":"10.1016\/0097-8493(89)90058-7_BIB2","doi-asserted-by":"crossref","first-page":"575","DOI":"10.1112\/blms\/17.6.575","article-title":"Characterizations of simply-connected finite polyhedra in 3-space","volume":"17","author":"Kong","year":"1985","journal-title":"Bulletin of the London Mathematical Society"},{"key":"10.1016\/0097-8493(89)90058-7_BIB3","series-title":"Algebraic Topology","author":"Maunder","year":"1980"},{"key":"10.1016\/0097-8493(89)90058-7_BIB4","article-title":"Classical Topology and Combinatorial Group Theory","volume":"72","author":"Stillwell","year":"1980"},{"key":"10.1016\/0097-8493(89)90058-7_BIB5","doi-asserted-by":"crossref","first-page":"255","DOI":"10.1145\/321637.321646","article-title":"Some parallel thinning algorithms for digital pictures","volume":"18","author":"Stefanelli","year":"1971","journal-title":"J. ACM"},{"key":"10.1016\/0097-8493(89)90058-7_BIB6","first-page":"733","article-title":"Hexagonal parallel pattern transformations","volume":"C18","author":"Golay","year":"1969","journal-title":"IEEE Trans."},{"key":"10.1016\/0097-8493(89)90058-7_BIB7","first-page":"403","article-title":"Linear skeletons from square cupboards","volume":"4","author":"Hilditch","year":"1969"},{"key":"10.1016\/0097-8493(89)90058-7_BIB8","first-page":"551","article-title":"Local properties of binary images in two dimensions","volume":"C20","author":"Gray","year":"1971","journal-title":"IEEE Trans."},{"key":"10.1016\/0097-8493(89)90058-7_BIB9","first-page":"539","article-title":"Multidimensional logical transforms","volume":"PAMI 5","author":"Preston","year":"1983","journal-title":"IEEE Trans."},{"key":"10.1016\/0097-8493(89)90058-7_BIB10","doi-asserted-by":"crossref","first-page":"827","DOI":"10.1145\/361573.361583","article-title":"Thinning algorithms on rectangular, hexagonal and triangular arrays","volume":"9","author":"Deutsch","year":"1972","journal-title":"C. ACM"},{"key":"10.1016\/0097-8493(89)90058-7_BIB11","doi-asserted-by":"crossref","first-page":"281","DOI":"10.1016\/0167-8655(84)90015-1","article-title":"Discrete topology and contour definition","volume":"2","author":"Kovalevsky","year":"1984","journal-title":"Pattern Recognition Letters"},{"key":"10.1016\/0097-8493(89)90058-7_BIB12","series-title":"Proc. 6th International Conference on Pattern Recognition","first-page":"414","article-title":"Topological properties and topology-preserving transformation of a three-dimensional binary picture","author":"Toriwaki","year":"1982"},{"key":"10.1016\/0097-8493(89)90058-7_BIB13","series-title":"Proc. 5th International Conference on Pattern Recognition","first-page":"1122","article-title":"Dot pattern processing using Voronoi polygons as neighborhoods","author":"Ahuja","year":"1980"},{"key":"10.1016\/0097-8493(89)90058-7_BIB14","series-title":"Uporiadochenie Topologicheskie Prostranstva","author":"Halimskii","year":"1977"},{"key":"10.1016\/0097-8493(89)90058-7_BIB15","series-title":"Proceedings of the IEEE International Conference on Systems, Man and Cybernetics","first-page":"1559","article-title":"Pattern analysis of N-dimensional digital images","author":"Khalimsky","year":"1986"},{"key":"10.1016\/0097-8493(89)90058-7_BIB16","doi-asserted-by":"crossref","first-page":"25","DOI":"10.1155\/S1048953388000036","article-title":"Topological structures in computer science","volume":"1","author":"Khalimsky","year":"1987","journal-title":"Journal of Applied Mathematics and Simulation"},{"key":"10.1016\/0097-8493(89)90058-7_BIB17","series-title":"Studientexte Digitale Bildverarbeitung","first-page":"56","article-title":"On the topology of discrete spaces","author":"Kovalevsky","year":"1986"},{"key":"10.1016\/0097-8493(89)90058-7_BIB18","unstructured":"E. Khalimsky, R. Kopperman and P. Meyer, Computer Graphics and Connected Topologies on Finite Ordered Sets. To appear in Topology and its Applications."},{"key":"10.1016\/0097-8493(89)90058-7_BIB19","first-page":"637","article-title":"A theory of non-uniformly digitized binary pictures","volume":"SMC 6","author":"Sklansky","year":"1976","journal-title":"IEEE Trans."},{"key":"10.1016\/0097-8493(89)90058-7_BIB20","unstructured":"T. Y. Kong, A. W. Roscoe and A. Rosenfeld, Concepts of Digital Topology. Submitted."}],"container-title":["Computers & Graphics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:0097849389900587?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:0097849389900587?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2019,3,15]],"date-time":"2019-03-15T06:30:06Z","timestamp":1552631406000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/0097849389900587"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1989,1]]},"references-count":20,"journal-issue":{"issue":"2","published-print":{"date-parts":[[1989,1]]}},"alternative-id":["0097849389900587"],"URL":"https:\/\/doi.org\/10.1016\/0097-8493(89)90058-7","relation":{},"ISSN":["0097-8493"],"issn-type":[{"value":"0097-8493","type":"print"}],"subject":[],"published":{"date-parts":[[1989,1]]}}}