{"id":6469,"date":"2020-09-20T07:56:40","date_gmt":"2020-09-20T05:56:40","guid":{"rendered":"http:\/\/www.arnaudom.fr\/wordpress\/?page_id=6469"},"modified":"2020-09-20T08:07:18","modified_gmt":"2020-09-20T06:07:18","slug":"influence","status":"publish","type":"page","link":"http:\/\/www.arnaudom.fr\/wordpress\/influence\/","title":{"rendered":"influence"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"6469\" class=\"elementor elementor-6469\">\n\t\t\t\t\t\t<div class=\"elementor-inner\">\n\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7dbbcc2 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"7dbbcc2\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-d96ff3a\" data-id=\"d96ff3a\" data-element_type=\"column\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-86a8969 elementor-widget elementor-widget-heading\" data-id=\"86a8969\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Images avec un reflex num\u00e9rique<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-35337a2 elementor-widget elementor-widget-heading\" data-id=\"35337a2\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Influence du pr\u00e9traitement sur les images<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c1b70bc elementor-widget elementor-widget-text-editor\" data-id=\"c1b70bc\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><em>Ecrit le 30\/12\/10.<\/em><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cae887b elementor-widget elementor-widget-text-editor\" data-id=\"cae887b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p>Lors de la r\u00e9alisation de mes derni\u00e8res photos, j&rsquo;ai pu pour la premi\u00e8re fois utiliser ma bo\u00eete \u00e0 flat et faire un pr\u00e9traitement total de mes images, en utilisant les fameuses images d&rsquo;offset, de dark et de flat (jusque-l\u00e0 je n&#8217;employais que l&rsquo;offset et le dark).<\/p><p>Je me suis alors pos\u00e9 la question suivante : le fait de faire un flat am\u00e9liore t-il vraiment l&rsquo;image, car finalement au cours du traitement, ce qui se passe reste relativement invisible. Du coup, je me suis amus\u00e9 \u00e0 traiter mes images de diff\u00e9rentes fa\u00e7ons, pour voir l&rsquo;influence du pr\u00e9traitement sur le r\u00e9sultat final. Je vous pr\u00e9sente donc le r\u00e9sultat de mes petites exp\u00e9riences sans pr\u00e9tention sur l&rsquo;amas ouvert M37.<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dff531e elementor-widget elementor-widget-heading\" data-id=\"dff531e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Sans pr\u00e9traitement :<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6b1a308 elementor-widget elementor-widget-text-editor\" data-id=\"6b1a308\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<div class=\"centre\" style=\"text-align: center;\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/tm3701large.jpg\" alt=\"M37\" \/><strong><span class=\"gras\">image obtenue par addition des images brutes de M37 (ni offset, ni dark, ni flat)<\/span><\/strong><\/div><div>\u00a0<\/div><div class=\"centre\" style=\"text-align: center;\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/tm3701gros.jpg\" alt=\"M37\" \/><strong><span class=\"gras\">La m\u00eame en gros plan sur l&rsquo;amas<\/span><\/strong><\/div><div>\u00a0<\/div><p>On en voit des d\u00e9fauts sur cette image : un fond de ciel pas du tout uniforme, des train\u00e9es de points lumineux form\u00e9es par les pixels chauds, du vignetage, bref \u2026 Beaucoup de choses \u00e0 corriger !<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-058f2e3 elementor-widget elementor-widget-heading\" data-id=\"058f2e3\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Pr\u00e9traitement avec offset et dark :<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-80d6110 elementor-widget elementor-widget-text-editor\" data-id=\"80d6110\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<div class=\"centre\"><div class=\"centre\" style=\"text-align: center;\"><img decoding=\"async\" src=\"http:\/\/www.arnaudom.fr\/Img\/tm3702large.jpg\" alt=\"M37\" \/><br \/><strong><span class=\"gras\">image obtenue par pr\u00e9traitement avec simple soustraction de l&rsquo;offset et du dark<\/span><\/strong><\/div><br \/><div class=\"centre\" style=\"text-align: center;\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/tm3702gros.jpg\" alt=\"M37\" \/><strong><span class=\"gras\">Gros plan sur l&rsquo;amas<\/span><\/strong><\/div><p>Il y a d\u00e9j\u00e0 beaucoup de mieux, mais reste encore quelques points chauds et ce fond du ciel d\u00e9grad\u00e9.<\/p><\/div>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cd607f5 elementor-widget elementor-widget-heading\" data-id=\"cd607f5\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Pr\u00e9traitement avec offset, dark et flat :<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4651de4 elementor-widget elementor-widget-text-editor\" data-id=\"4651de4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p class=\"col5 gras centre\">:<\/p><div class=\"centre\" style=\"text-align: center;\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/tm3703large.jpg\" alt=\"M37\" \/><strong><span class=\"gras\">image obtenue par soustraction de l&rsquo;offset, du dark et division par le flat<\/span><\/strong><\/div><div>\u00a0<\/div><div class=\"centre\" style=\"text-align: center;\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/tm3703gros.jpg\" alt=\"M37\" \/><strong><span class=\"gras\">Le gros plan<\/span><\/strong><\/div><p>Le r\u00e9sultat est bien meilleur avec le flat concernant le fond du ciel, ce dernier est bien plus uniforme.<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-db3941f elementor-widget elementor-widget-heading\" data-id=\"db3941f\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Pr\u00e9traitement total avec IRIS :<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c81f40f elementor-widget elementor-widget-text-editor\" data-id=\"c81f40f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<div class=\"centre\" style=\"text-align: center;\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/tm3704gros.jpg\" alt=\"M37\" \/><strong><span class=\"gras\">image obtenue en faisant le pr\u00e9traitement total, avec soustraction de l&rsquo;offset, soustraction et optimisation du dark, utilisation de la fonction find_hot et division par le flat<\/span><\/strong><\/div><div>\u00a0<\/div><p>Voil\u00e0 une image de M37 d\u00e9barrass\u00e9e de tous les d\u00e9fauts du d\u00e9but, dans un fond de ciel propre et uniforme : donc oui en conclusion, cela vaut vraiment la peine de s&#8217;emb\u00eater \u00e0 faire l&rsquo;acquisition des offset, dark et flat si on veut obtenir une photo satisfaisante <span class=\"milieu2\"> <img decoding=\"async\" src=\"http:\/\/arnaudom.fr\/Img\/smclin.gif\" alt=\"clin d'oeil\" \/><\/span> !<\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Images avec un reflex num\u00e9rique Influence du pr\u00e9traitement sur les images Ecrit le 30\/12\/10. Lors de la r\u00e9alisation de mes derni\u00e8res photos, j&rsquo;ai pu pour la premi\u00e8re fois utiliser ma bo\u00eete \u00e0 flat et faire un pr\u00e9traitement total de mes images, en utilisant les fameuses images d&rsquo;offset, de dark et de flat (jusque-l\u00e0 je n&#8217;employais &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"http:\/\/www.arnaudom.fr\/wordpress\/influence\/\"> <span class=\"screen-reader-text\">influence<\/span> Lire la suite\u00a0\u00bb<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-6469","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"http:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages\/6469","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/comments?post=6469"}],"version-history":[{"count":5,"href":"http:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages\/6469\/revisions"}],"predecessor-version":[{"id":6475,"href":"http:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages\/6469\/revisions\/6475"}],"wp:attachment":[{"href":"http:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/media?parent=6469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}