{"id":172,"date":"2020-12-04T00:13:25","date_gmt":"2020-12-04T00:13:25","guid":{"rendered":"http:\/\/med-space.org\/youssef-zaz-master\/?page_id=172"},"modified":"2020-12-14T22:35:19","modified_gmt":"2020-12-14T22:35:19","slug":"filtre-median","status":"publish","type":"page","link":"https:\/\/yzaz.net\/master\/filtre-median\/","title":{"rendered":"Filtre M\u00e9dian"},"content":{"rendered":"<p>C\u2019est un filtre non\u2010lin\u00e9aire, qui ne peut pas s\u2019impl\u00e9menter comme une convolution On remplace la valeur d\u2019un pixel par la valeur m\u00e9diane dans son voisinage 2n + 1 X 2n + 1<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-573 \" src=\"http:\/\/med-space.org\/youssef-zaz-master\/wp-content\/uploads\/2020\/12\/median.png\" alt=\"\" width=\"479\" height=\"223\" srcset=\"https:\/\/yzaz.net\/master\/wp-content\/uploads\/2020\/12\/median.png 660w, https:\/\/yzaz.net\/master\/wp-content\/uploads\/2020\/12\/median-300x140.png 300w\" sizes=\"(max-width: 479px) 100vw, 479px\" \/><\/p>\n<p>Exemple de code Matlab:<\/p>\n<pre class=\"brush: matlabkey; title: ; notranslate\" title=\"\">\r\nI = imread('eight.tif');\r\nJ = imnoise(I,'salt &amp; pepper',0.02);\r\nK = medfilt2(J);\r\nsubplot ( 1 , 3 , 1 ) ; imshow(I) ; title ( 'Image originale');\r\nsubplot ( 1 , 3 , 2 ) ; imshow(J) ; title ( 'Image bruit\u00e9e');\r\nsubplot ( 1 , 3 , 3 ) ; imshow(K) ; title ( 'image filtr\u00e9e avec un filtre m\u00e9dian');\r\n<\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-576 size-full\" src=\"http:\/\/med-space.org\/youssef-zaz-master\/wp-content\/uploads\/2020\/12\/median.jpg\" alt=\"\" width=\"974\" height=\"287\" srcset=\"https:\/\/yzaz.net\/master\/wp-content\/uploads\/2020\/12\/median.jpg 974w, https:\/\/yzaz.net\/master\/wp-content\/uploads\/2020\/12\/median-300x88.jpg 300w, https:\/\/yzaz.net\/master\/wp-content\/uploads\/2020\/12\/median-768x226.jpg 768w\" sizes=\"(max-width: 974px) 100vw, 974px\" \/><\/p>\n<p>Le filtre m\u00e9dian est tr\u00e8s efficace contre le bruit de nature impulsionnelle.<\/p>\n","protected":false},"excerpt":{"rendered":"<div class=\"mh-excerpt\"><p>C\u2019est un filtre non\u2010lin\u00e9aire, qui ne peut pas s\u2019impl\u00e9menter comme une convolution On remplace la valeur d\u2019un pixel par la valeur m\u00e9diane dans son voisinage <a class=\"mh-excerpt-more\" href=\"https:\/\/yzaz.net\/master\/filtre-median\/\" title=\"Filtre M\u00e9dian\">[&#8230;]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":60,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"https:\/\/yzaz.net\/master\/wp-json\/wp\/v2\/pages\/172"}],"collection":[{"href":"https:\/\/yzaz.net\/master\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/yzaz.net\/master\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/yzaz.net\/master\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yzaz.net\/master\/wp-json\/wp\/v2\/comments?post=172"}],"version-history":[{"count":6,"href":"https:\/\/yzaz.net\/master\/wp-json\/wp\/v2\/pages\/172\/revisions"}],"predecessor-version":[{"id":613,"href":"https:\/\/yzaz.net\/master\/wp-json\/wp\/v2\/pages\/172\/revisions\/613"}],"wp:attachment":[{"href":"https:\/\/yzaz.net\/master\/wp-json\/wp\/v2\/media?parent=172"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}