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The self-adaptive rectangular filter is used to screen out the crossing point of candidate angle, so as to fit the edge curves and figure out the contraction degree of vein. The experimental results show that this algorithm can better detect the contraction degree of crossed vein blood vessel, with an average error remaining at \u00b1 1\u2218 under different resolutions.<\/jats:p>","DOI":"10.3233\/jcm-215833","type":"journal-article","created":{"date-parts":[[2021,12,14]],"date-time":"2021-12-14T12:14:23Z","timestamp":1639484063000},"page":"599-614","source":"Crossref","is-referenced-by-count":0,"title":["Angle detection system for crossing compression of retinal artery and vein"],"prefix":"10.66113","volume":"22","author":[{"given":"Chunping","family":"Liao","sequence":"first","affiliation":[{"name":"School of Electrical Engineering and Intelligentization, Dongguan University of Technology, Dongguan, Guangdong, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xuefang","family":"Chen","sequence":"additional","affiliation":[{"name":"School of Computer Science and Technology, Dongguan University of Technology, Dongguan, Guangdong, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bifu","family":"Li","sequence":"additional","affiliation":[{"name":"School of Electrical Engineering and Intelligentization, Dongguan University of Technology, Dongguan, Guangdong, China"},{"name":"School of Information Engineering Guangdong University of Technology, Guangdong, Guangdong, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaofang","family":"Zhao","sequence":"additional","affiliation":[{"name":"School of Electrical Engineering and Intelligentization, Dongguan University of Technology, Dongguan, Guangdong, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Li","family":"Yu","sequence":"additional","affiliation":[{"name":"Shanghai Dafeng Technology Co., Ltd, Shanghai, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"55691","reference":[{"issue":"3","key":"10.3233\/JCM-215833_ref1","doi-asserted-by":"crossref","first-page":"364","DOI":"10.1111\/aos.13879","article-title":"Primary angle alosure and primary angle closure glaucoma in retinal vein occlusion","volume":"97","author":"Xu","year":"2019","journal-title":"Acta Ophthalmologica."},{"issue":"7","key":"10.3233\/JCM-215833_ref2","doi-asserted-by":"crossref","first-page":"652","DOI":"10.1111\/aos.14141","article-title":"Association of glaucoma with risk of retinal vein occlusion: A meta-analysis","volume":"97","author":"Yin","year":"2019","journal-title":"Acta Ophthalmologica."},{"issue":"5","key":"10.3233\/JCM-215833_ref3","doi-asserted-by":"crossref","first-page":"353","DOI":"10.1007\/s10384-019-00676-5","article-title":"Arteriovenous crossing associated with branch retinal vein occlusion","volume":"63","author":"Muraoka","year":"2019","journal-title":"Japanese Journal of Ophthalmology."},{"issue":"10","key":"10.3233\/JCM-215833_ref4","doi-asserted-by":"crossref","first-page":"1040","DOI":"10.3109\/02713683.2014.971930","article-title":"Anteroposterior tortuosity of the retinal vein at arteriovenous crossings in healthy subjects","volume":"40","author":"Kenji","year":"2015","journal-title":"Current Eye Research."},{"issue":"4","key":"10.3233\/JCM-215833_ref5","first-page":"711","article-title":"Application of quantitative OCTA in retinal vein occlusion","volume":"21","author":"Jin","year":"2021","journal-title":"International Eye Science."},{"issue":"1","key":"10.3233\/JCM-215833_ref6","first-page":"299","article-title":"Smoothing vs. sharpening of colour images: Together or separated","volume":"2","author":"Cristina","year":"2018","journal-title":"Applied Mathematics and Nonlinear Sciences."},{"issue":"6","key":"10.3233\/JCM-215833_ref7","doi-asserted-by":"crossref","first-page":"1059","DOI":"10.1109\/TMM.2008.2001384","article-title":"Robust image corner detection based on the chord-to-point distance accumulation technique","volume":"10","author":"Awrangjeb","year":"2008","journal-title":"IEEE Transactions on Multimedia."},{"issue":"12","key":"10.3233\/JCM-215833_ref8","first-page":"1500","article-title":"Adaptive corner detection based on chord-to-point distance accumulation","volume":"17","author":"Wang","year":"2012","journal-title":"Journal of Image and Graphics."},{"issue":"s2","key":"10.3233\/JCM-215833_ref9","first-page":"850","article-title":"Automatic detection and classification of feature points from retinal fundus images","volume":"88","author":"Zhao","year":"2011","journal-title":"Computer Engineering & Applications."},{"key":"10.3233\/JCM-215833_ref10","unstructured":"Zhang W. 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