{"id":10224,"date":"2021-02-28T18:01:33","date_gmt":"2021-02-28T18:01:33","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/ic443-nebuleuse-de-la-meduse-revised\/"},"modified":"2025-06-23T21:03:10","modified_gmt":"2025-06-23T19:03:10","slug":"ic443-nebuleuse-de-la-meduse-revised","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/ic443-nebuleuse-de-la-meduse-revised\/","title":{"rendered":"IC443 – N\u00e9buleuse de la M\u00e9duse (revised)"},"content":{"rendered":"

J’ai retrait\u00e9 IC443, propos\u00e9e voici quelques jours…<\/p>\n

Voici le r\u00e9sultat : (jpeg 70 %, image r\u00e9duite \u00e0 50 %)<\/p>\n

\"\"<\/a><\/p>\n

En plus de jouer sur l’histogramme, j’ai effectu\u00e9 ici une r\u00e9duction du bruit, que j’esp\u00e8re pas trop brutale.
\nUn crop pr\u00e9liminaire a \u00e9t\u00e9 fait : les images sont d\u00e9cal\u00e9es de quelques pixels car un dithering est impos\u00e9 et le pointage n’est pas absolument identique, la monture \u00e9tant rentr\u00e9e \u00e0 chaque fin de nuit.<\/p>\n

J’ai finalement gard\u00e9 toutes les images – m\u00eame celles pour lesquelles le contraste est mauvais : elles sont pond\u00e9r\u00e9es ad\u00e9quatement par PixInsight je trouve. Si je compare le r\u00e9sultat (135 images) avec celui obtenu sur les 90 meilleures, il reste un l\u00e9ger avantage \u00e0 conserver le tout.
\nIl y probablement quelques images avec des satellites ou des avions, mais c’est noy\u00e9 dans la masse.<\/p>\n\n\n

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\n Veuillez voter<\/span>\n <\/div>\n <\/div>\n","protected":false},"excerpt":{"rendered":"

J’ai retrait\u00e9 IC443, propos\u00e9e voici quelques jours… Voici le r\u00e9sultat : (jpeg 70 %, image r\u00e9duite \u00e0 50 %) En plus de jouer sur l’histogramme, j’ai effectu\u00e9 ici une r\u00e9duction du bruit, que j’esp\u00e8re pas trop brutale. Un crop pr\u00e9liminaire a \u00e9t\u00e9 fait : les images sont d\u00e9cal\u00e9es de quelques pixels car un dithering est […]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[2],"tags":[],"class_list":["post-10224","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10224","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/comments?post=10224"}],"version-history":[{"count":2,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10224\/revisions"}],"predecessor-version":[{"id":15650,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10224\/revisions\/15650"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=10224"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=10224"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=10224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}