{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,10,24]],"date-time":"2023-10-24T11:17:15Z","timestamp":1698146235617},"reference-count":18,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2007,3,21]],"date-time":"2007-03-21T00:00:00Z","timestamp":1174435200000},"content-version":"vor","delay-in-days":4827,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Systems &amp;amp; Computers in Japan"],"published-print":{"date-parts":[[1994,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Image coding technology has been developed for various purposes with the progress of large\u2010scale communication networks and recording technology. Notably, a method using a discrete cosine transform (DCT) and a variable\u2010length code (VLC) has been popular for still image coding. Although this method is excellent for general purposes, some images such as the edges of letters become blurred unless the code compression rate is sufficiently high.<\/jats:p><jats:p>This paper proposes a method of estimating high\u2010frequency components from low\u2010frequency components and auto\u2010regressive (AR) coefficients by applying an AR model to the DCT coefficient of an image block (or \u201cblock edge\u201d) containing sharp edges. The method produces AR coefficients for each block and preserves the AR coefficients, DCT coefficients and the estimated errors of high\u2010frequency components as data to reconstruct images. The newly introduced AR coefficients are quantized uniformly and added to the head of the components in the standard method. The estimated errors are added to the data instead of the high\u2010frequency components. Examples of images containing sharp edges such as letters were processed by the proposed method, and the results confirm the usefulness of the method.<\/jats:p>","DOI":"10.1002\/scj.4690250404","type":"journal-article","created":{"date-parts":[[2007,7,8]],"date-time":"2007-07-08T02:16:43Z","timestamp":1183861003000},"page":"33-41","source":"Crossref","is-referenced-by-count":1,"title":["A still image coding method in which AR model estimation is applied to dct coefficients of edge blocks"],"prefix":"10.1002","volume":"25","author":[{"given":"Koichi","family":"Fukuda","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tomohiko","family":"Mizuguchi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Akira","family":"Kawanaka","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2007,3,21]]},"reference":[{"issue":"6","key":"e_1_2_1_2_2","first-page":"693","article-title":"Image\u2010information compression in the future. Journal of Institute of TV","volume":"44","author":"Hiroshi H.","year":"1990","journal-title":"Japan"},{"issue":"10","key":"e_1_2_1_3_2","first-page":"1011","article-title":"Standardization of high\u2010efficiency coding. Journal of Institute of TV","volume":"43","author":"Yasuda H.","year":"1989","journal-title":"Japan"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1109\/TCOM.1977.1093763"},{"key":"e_1_2_1_5_2","doi-asserted-by":"publisher","DOI":"10.1109\/29.17536"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1109\/29.56057"},{"key":"e_1_2_1_7_2","doi-asserted-by":"publisher","DOI":"10.1109\/TASSP.1986.1164962"},{"key":"e_1_2_1_8_2","first-page":"761","volume-title":"Subband coding of digital images using symmetric short kernel filters and arithmetic coding techniques","author":"Gall D. L.","year":"1988"},{"key":"e_1_2_1_9_2","unstructured":"Takayama A. S.KatoandY.Yasuda.Compression of letter\u2010images using orthogonal transform. Spring National Conference of I.E.C.E. Japan D\u2010291 (1990)."},{"key":"e_1_2_1_10_2","article-title":"Proposal of high\u2010efficiency hybrid coding for color facsimile. Papers of Technical Group on Information Engineering","volume":"91","author":"Katsuno S.","year":"1991","journal-title":"I.E.C.E., Japan"},{"key":"e_1_2_1_11_2","article-title":"Efficient representation of high\u2010frequency components for high\u2010quality image coding","volume":"89","author":"Kawanaka A.","year":"1989","journal-title":"I.E.C.E., Japan"},{"key":"e_1_2_1_12_2","unstructured":"Kawanaka A.andM.Takagi.High\u2010frequency component representation method using DCT and AR model for still picture coding Picture Coding Symposium pp.189\u2013190(1991)."},{"key":"e_1_2_1_13_2","article-title":"Image coding using DCT coefficient with AR model. Papers of Technical Group on Information Engineering","volume":"91","author":"Kawanaka A.","year":"1991","journal-title":"I.E.C.E., Japan"},{"issue":"6","key":"e_1_2_1_14_2","first-page":"398","volume":"18","author":"Yasuda H.","year":"1987","journal-title":"International standardization of still\u2010image coding. Journal of Institute of Image Electronics"},{"key":"e_1_2_1_15_2","doi-asserted-by":"publisher","DOI":"10.1016\/B978-0-12-597302-1.50009-8"},{"key":"e_1_2_1_16_2","volume-title":"Multidimensional processing of television images","author":"Fukinuki K.","year":"1988"},{"key":"e_1_2_1_17_2","doi-asserted-by":"publisher","DOI":"10.1109\/T-C.1974.223784"},{"key":"e_1_2_1_18_2","doi-asserted-by":"publisher","DOI":"10.1109\/TASSP.1980.1163351"},{"key":"e_1_2_1_19_2","volume-title":"Spectrum Analyses","author":"Hino M.","year":"1977"}],"container-title":["Systems and Computers in Japan"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fscj.4690250404","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/scj.4690250404","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,10,24]],"date-time":"2023-10-24T00:29:53Z","timestamp":1698107393000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/scj.4690250404"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1994,1]]},"references-count":18,"journal-issue":{"issue":"4","published-print":{"date-parts":[[1994,1]]}},"alternative-id":["10.1002\/scj.4690250404"],"URL":"https:\/\/doi.org\/10.1002\/scj.4690250404","archive":["Portico"],"relation":{},"ISSN":["0882-1666","1520-684X"],"issn-type":[{"value":"0882-1666","type":"print"},{"value":"1520-684X","type":"electronic"}],"subject":[],"published":{"date-parts":[[1994,1]]}}}