{"id":6047,"date":"2020-08-29T07:35:01","date_gmt":"2020-08-29T05:35:01","guid":{"rendered":"http:\/\/www.arnaudom.fr\/wordpress\/?page_id=6047"},"modified":"2020-08-29T07:44:28","modified_gmt":"2020-08-29T05:44:28","slug":"finaddition","status":"publish","type":"page","link":"https:\/\/www.arnaudom.fr\/wordpress\/finaddition\/","title":{"rendered":"finaddition"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"6047\" class=\"elementor elementor-6047\">\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-c9412c9 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"c9412c9\" 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-b3627a1\" data-id=\"b3627a1\" 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-9c4526e elementor-widget elementor-widget-heading\" data-id=\"9c4526e\" 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\">Addition des images avec PixInsight (4\/4)<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-98431f1 elementor-widget elementor-widget-heading\" data-id=\"98431f1\" 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\">6- Faire une troisi\u00e8me addition pour obtenir l'image finale.<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-83fbe4c elementor-widget elementor-widget-text-editor\" data-id=\"83fbe4c\" 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>On va faire une derni\u00e8re addition de nos images, donc on va se servir une derni\u00e8re fois de notre process <strong><span class=\"gras\">ImageIntegration<\/span><\/strong> ou, si vous utilisez mes process icons, on va aller sur <strong><span class=\"gras\">Addition_finale<\/span><\/strong>.<\/p><p>On entre donc \u00e0 nouveau nos images <strong><span class=\"gras\">debayer_M51001_c_cc_r_20131121205308.fit \u2026<\/span><\/strong> avec <strong><span class=\"gras\">Add Files<\/span><\/strong>.<\/p><p>Dans<strong> <span class=\"gras\">Image Integration<\/span><\/strong>, on garde les m\u00eames param\u00e8tres que pr\u00e9c\u00e9demment.<\/p><p>Ce qui change ce sont les param\u00e8tres dans <strong><span class=\"gras\">Pixel Rejection (1)<\/span><\/strong>.<\/p><p>Il nous faut choisir un algorithme de rejet des pixels, dans mon cas j&rsquo;ai choisi<strong> <span class=\"gras\">Linear Fit Clipping<\/span><\/strong>.<\/p><div class=\"centre\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/pix152.jpg\" alt=\"Pix\" \/><\/div><p>En fait, le choix de l&rsquo;algorithme d\u00e9pend du nombre d&rsquo;images \u00e0 additionner :<br \/>&#8211; si on a moins de 6 images, on choisira Percentile Clipping<br \/>&#8211; entre 7 et 10 images, on choisira Averaged Sigma Clipping<br \/>&#8211; entre 10 \u00e0 25 images on choisira Winsorized Sigma Clipping<br \/>&#8211; au-del\u00e0 de 25 images, on choisira Linear Fit Clipping.<\/p><p>On peut aussi tester les diff\u00e9rents algorithmes pour voir le r\u00e9sultat.<\/p><p>Dans <strong><span class=\"gras\">Pixel Rejection (2)<\/span><\/strong>, il faut r\u00e9gler les valeurs des param\u00e8tres<strong> <span class=\"gras\">Linear fit low<\/span><\/strong> et <strong><span class=\"gras\">Linear fit high<\/span><\/strong>, comme on l&rsquo;a fait avec Sigma low et Sigma high dans le pr\u00e9traitement. Ici j&rsquo;ai mis les deux \u00e0 5.<\/p><div class=\"centre\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/pix153.jpg\" alt=\"Pix\" \/><\/div><p>On lance le process en cliquant sur le disque bleu.<\/p><p>A la fin on se retrouve avec 4 images nomm\u00e9es integration, rejection_low, rejection_high et slope.<\/p><div class=\"centre\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/pix154.jpg\" alt=\"Pix\" \/><\/div><p>Regardons ce que contient l&rsquo;image <strong><span class=\"gras\">rejection_high<\/span><\/strong> apr\u00e8s avoir fait un <strong><span class=\"gras\">Auto Stretch<\/span><\/strong>.<\/p><div class=\"centre\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/pix155.jpg\" alt=\"Pix\" \/><\/div><p>On voit parfaitement sur l&rsquo;image que l&rsquo;on a rejet\u00e9 les traces de nos avions et satellite, ainsi que le reflet parasite en bas \u00e0 droite.Le r\u00e9sultat semble donc convenable.<\/p><p>On peut aller aussi jeter un \u0153il sur l&rsquo;image <strong><span class=\"gras\">rejection_low<\/span><\/strong>.<\/p><div class=\"centre\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/pix156.jpg\" alt=\"Pix\" \/><\/div><p>Le but est, comme lors du pr\u00e9traitement, d&rsquo;obtenir une image uniforme des pixels, et \u00e9galement de bien rejeter les traces parasites comme on vient de le faire avec par exemple nos passages d&rsquo;avions.<\/p><p>Quand j&rsquo;observe mon image integration, apr\u00e8s lui avoir appliqu\u00e9 un <strong><span class=\"gras\">Auto Stretch<\/span><\/strong>, on voit effectivement qu&rsquo;en particulier les traces de nos avions ont disparu.<\/p><div class=\"centre\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/pix157.jpg\" alt=\"Pix\" \/><\/div><p>\u00a0<\/p><div class=\"centre\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/pix158.jpg\" alt=\"Pix\" \/><\/div><p>Enfin, on peut jeter un \u0153il dans la console pour voir les valeurs signal\/bruit de notre image.<\/p><div class=\"centre\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/pix159.jpg\" alt=\"Pix\" \/><\/div><p>On avait obtenu 2,0189 \u2013 1,8870 -1,5683, l\u00e0 on des valeurs de 2,2228-1,8568-1,5474 qui en sont assez proches. On peut consid\u00e9rer que ces r\u00e9sultats sont corrects, sinon on peut refaire des essais en modifiant les valeurs de Linear fit low et Linear fit high jusqu&rsquo;\u00e0 obtenir des r\u00e9sultats plus satisfaisants.<\/p><p>Voil\u00e0, il ne nous reste plus qu&rsquo;\u00e0 sauvegarder notre image integration une fois que celle-ci nous donne satisfaction, dans mon cas j&rsquo;ai sauvegard\u00e9 mon image sous le nom <strong><span class=\"gras\">M51finale.fit<\/span><\/strong>.<\/p><div class=\"centre\"><img decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.arnaudom.fr\/Img\/pix160.jpg\" alt=\"Pix\" \/><\/div><p>L&rsquo;addition des images maintenant termin\u00e9e, dans la suite on va partir de notre image M51finale sur laquelle on va pouvoir appliquer le traitement proprement dit.<\/p><p>Rendez-vous au prochain tutoriel qui parlera du traitement des images lin\u00e9aires.<\/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-933a984 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"933a984\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a href=\"http:\/\/www.arnaudom.fr\/wordpress\/croper\" class=\"elementor-button-link elementor-button elementor-size-sm\" role=\"button\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t<span class=\"elementor-button-icon elementor-align-icon-left\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-arrow-left\"><\/i>\t\t\t<\/span>\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Page 3<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\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>Addition des images avec PixInsight (4\/4) 6- Faire une troisi\u00e8me addition pour obtenir l&rsquo;image finale. On va faire une derni\u00e8re addition de nos images, donc on va se servir une derni\u00e8re fois de notre process ImageIntegration ou, si vous utilisez mes process icons, on va aller sur Addition_finale. On entre donc \u00e0 nouveau nos images &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.arnaudom.fr\/wordpress\/finaddition\/\"> <span class=\"screen-reader-text\">finaddition<\/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-6047","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages\/6047","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/comments?post=6047"}],"version-history":[{"count":4,"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages\/6047\/revisions"}],"predecessor-version":[{"id":6052,"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/pages\/6047\/revisions\/6052"}],"wp:attachment":[{"href":"https:\/\/www.arnaudom.fr\/wordpress\/wp-json\/wp\/v2\/media?parent=6047"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}