S\u00e9minaire Jean-Marie NICOLAS (T\u00e9l\u00e9com ParisTech)<\/p>\n
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Le r\u00e9sum\u00e9 de cette pr\u00e9sentation est le suivant: Les lois de l’imagerie coh\u00e9rente sont d\u00e9finies sur R+ et ont une particularit\u00e9 de pouvoir \u00eatre mod\u00e9lis\u00e9es avec une param\u00e9trisation mettant en valeur d’une part un facteur d’\u00e9chelle, et d’autre part des facteurs de forme, ces deux cat\u00e9gories de facteurs \u00e9tant ind\u00e9pendants. Il existe dans ce cas une approche, les log-statistiques ou statistiques de Mellin, qui est parfaitement adapt\u00e9e \u00e0 la notion de bruit multiplicatif. Or effectivement, les lois de l’imagerie coh\u00e9rente peuvent se voir comme une texture sur laquelle se rajoute du bruit multiplicatif : le chatoiement. Pour un b\u00e9otien, tout cela peut sembler tr\u00e8s compliqu\u00e9. Aussi, a \u00e9t\u00e9 d\u00e9velopp\u00e9 \u00e0 T\u00e9l\u00e9com Paristech une plateforme en python~: SARLAB, qui permet de d\u00e9mystifier toutes les lois utilis\u00e9es et qui permet aussi de se rendre compte qu’il existe une famille de fonctions, les fonctions de Meijer, dont l’\u00e9criture simplifie consid\u00e9rablement les comparaisons de toutes les lois utilis\u00e9es actuellement. L’objectif de ce s\u00e9minaire est d’une part le rappel du formalisme des log-statistiques appliqu\u00e9es aux lois de l’imagerie coh\u00e9rente, et d’autre part de montrer l’outil SARLAB qui permet depuis n’importe quel portable ou ordinateur de se familiariser avec ces m\u00e9thodes.<\/span> S\u00e9minaire Jean-Marie NICOLAS (T\u00e9l\u00e9com ParisTech) Le r\u00e9sum\u00e9 de cette pr\u00e9sentation est le suivant: Les lois de l’imagerie coh\u00e9rente sont d\u00e9finies sur R+ et ont une particularit\u00e9 de pouvoir \u00eatre mod\u00e9lis\u00e9es avec une param\u00e9trisation mettant […]<\/p>\n","protected":false},"author":129,"featured_media":2524,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"none","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":301,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[19],"tags":[],"class_list":["post-6014","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-archive-actualites"],"acf":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/www.univ-smb.fr\/listic\/wp-content\/uploads\/sites\/66\/2017\/11\/newsseminaire.jpg","_links":{"self":[{"href":"https:\/\/www.univ-smb.fr\/listic\/wp-json\/wp\/v2\/posts\/6014","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.univ-smb.fr\/listic\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.univ-smb.fr\/listic\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.univ-smb.fr\/listic\/wp-json\/wp\/v2\/users\/129"}],"replies":[{"embeddable":true,"href":"https:\/\/www.univ-smb.fr\/listic\/wp-json\/wp\/v2\/comments?post=6014"}],"version-history":[{"count":3,"href":"https:\/\/www.univ-smb.fr\/listic\/wp-json\/wp\/v2\/posts\/6014\/revisions"}],"predecessor-version":[{"id":10720,"href":"https:\/\/www.univ-smb.fr\/listic\/wp-json\/wp\/v2\/posts\/6014\/revisions\/10720"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.univ-smb.fr\/listic\/wp-json\/wp\/v2\/media\/2524"}],"wp:attachment":[{"href":"https:\/\/www.univ-smb.fr\/listic\/wp-json\/wp\/v2\/media?parent=6014"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.univ-smb.fr\/listic\/wp-json\/wp\/v2\/categories?post=6014"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.univ-smb.fr\/listic\/wp-json\/wp\/v2\/tags?post=6014"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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