{"id":170,"date":"2020-12-04T00:12:51","date_gmt":"2020-12-04T00:12:51","guid":{"rendered":"http:\/\/med-space.org\/youssef-zaz-master\/?page_id=170"},"modified":"2020-12-13T23:31:08","modified_gmt":"2020-12-13T23:31:08","slug":"filtre-gaussien","status":"publish","type":"page","link":"https:\/\/yzaz.net\/master\/filtre-gaussien\/","title":{"rendered":"Filtre Gaussien"},"content":{"rendered":"<p>Le filtre gaussien donne un meilleur lissage et une meilleure r\u00e9duction du bruit que le filtre moyenne. Utilis\u00e9 par David Marr, l\u2019un des pionniers du traitement de l\u2019image . La r\u00e9ponse impulsionnelle est donn\u00e9e par :<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-569 aligncenter\" src=\"http:\/\/med-space.org\/youssef-zaz-master\/wp-content\/uploads\/2020\/12\/Gauss-eq-300x72.jpg\" alt=\"\" width=\"300\" height=\"72\" srcset=\"https:\/\/yzaz.net\/master\/wp-content\/uploads\/2020\/12\/Gauss-eq-300x72.jpg 300w, https:\/\/yzaz.net\/master\/wp-content\/uploads\/2020\/12\/Gauss-eq.jpg 393w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><br \/>\nExemple de mise en \u0153uvre : une convolution avec ce masque:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-570 aligncenter\" src=\"http:\/\/med-space.org\/youssef-zaz-master\/wp-content\/uploads\/2020\/12\/Gauss-masque.jpg\" alt=\"\" width=\"263\" height=\"201\" srcset=\"https:\/\/yzaz.net\/master\/wp-content\/uploads\/2020\/12\/Gauss-masque.jpg 263w, https:\/\/yzaz.net\/master\/wp-content\/uploads\/2020\/12\/Gauss-masque-80x60.jpg 80w\" sizes=\"(max-width: 263px) 100vw, 263px\" \/><\/p>\n<p>Exemple de code avec Matlab:<\/p>\n<pre class=\"brush: matlabkey; title: ; notranslate\" title=\"\">\r\nI = imread('cameraman.tif');\r\nIblur = imgaussfilt(I,2); % Image filtr\u00e9e avec un filtre Gaussiin- Sigma = 2\r\nsubplot ( 1 , 2 , 1 ) ; imshow(I) ; title ( 'Image originale');\r\nsubplot ( 1 , 2 , 2 ) ; imshow(Iblur) ; title ( 'image filtr\u00e9e avec un filtre Gaussien');\r\n<\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-567 size-full\" src=\"http:\/\/med-space.org\/youssef-zaz-master\/wp-content\/uploads\/2020\/12\/gaussien.jpg\" alt=\"\" width=\"526\" height=\"232\" srcset=\"https:\/\/yzaz.net\/master\/wp-content\/uploads\/2020\/12\/gaussien.jpg 526w, https:\/\/yzaz.net\/master\/wp-content\/uploads\/2020\/12\/gaussien-300x132.jpg 300w\" sizes=\"(max-width: 526px) 100vw, 526px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<div class=\"mh-excerpt\"><p>Le filtre gaussien donne un meilleur lissage et une meilleure r\u00e9duction du bruit que le filtre moyenne. Utilis\u00e9 par David Marr, l\u2019un des pionniers du <a class=\"mh-excerpt-more\" href=\"https:\/\/yzaz.net\/master\/filtre-gaussien\/\" title=\"Filtre Gaussien\">[&#8230;]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":55,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"https:\/\/yzaz.net\/master\/wp-json\/wp\/v2\/pages\/170"}],"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=170"}],"version-history":[{"count":4,"href":"https:\/\/yzaz.net\/master\/wp-json\/wp\/v2\/pages\/170\/revisions"}],"predecessor-version":[{"id":572,"href":"https:\/\/yzaz.net\/master\/wp-json\/wp\/v2\/pages\/170\/revisions\/572"}],"wp:attachment":[{"href":"https:\/\/yzaz.net\/master\/wp-json\/wp\/v2\/media?parent=170"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}