{"id":10513,"date":"2024-03-12T11:55:41","date_gmt":"2024-03-12T11:55:41","guid":{"rendered":"https:\/\/groupeastronomiespa.be\/astrogas\/la-rosette-4\/"},"modified":"2025-06-08T22:43:52","modified_gmt":"2025-06-08T20:43:52","slug":"la-rosette-4","status":"publish","type":"post","link":"https:\/\/groupeastronomiespa.be\/astrogas\/la-rosette-4\/","title":{"rendered":"La Rosette"},"content":{"rendered":"

Salut,<\/p>\n

retour sur une image de 2019, 18 images de 600 secondes au T250 avec le Nikon D3.
\n Pr\u00e9-traitement PI
\nWBBP
\nEnsuite traitement toujours avec PI<\/p>\n

en lin\u00e9aire:
\nBXT Correct only pour corriger la d\u00e9formation r\u00e9siduelle des \u00e9toiles en bord de champ.
\nGradient correction
\nBackround neutalization
\nColorCalibration (Pas SPCC car je ne suis pas parvenu \u00e0 faire un plate solve pour une raison que j’ignore)
\nBXT en mode d\u00e9convolution
\nNXT pour la r\u00e9duction du bruit
\nHT pour mont\u00e9e en histogramme<\/p>\n

Non-lin\u00e9aire:
\nClone de l’image
\nSTX pour cr\u00e9er une image objet et une image \u00e9toiles seules
\nExtraction de la composante L pour les deux images afin de les utiliser comme masque de protection.
\nLocal HistogramEqualisation avec masque objet en place (protection fond de ciel et \u00e9toiles)
\nCurveTransformation en mode saturation
\nUnsharpMask
\nIdem sans unsharp avec masque \u00e9toile en place pour rehausser la couleur des \u00e9toiles seules
\nSCNR pour supprimer une l\u00e9g\u00e8re dominante verte
\nDynamic crop pour supprimer les bords
\nResample pour donner une taille ad\u00e9quate pour visualisation
\nenregistrement JPEG pour le poids<\/p>\n

C’est vite dit comme cela mais j’y ai pass\u00e9 la matin\u00e9e :o)<\/p>\n

Vous savez tout.<\/p>\n

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

JM<\/p>\n\n\n

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\n 10\/10 - (1 vote) <\/div>\n <\/div>\n","protected":false},"excerpt":{"rendered":"

Salut, retour sur une image de 2019, 18 images de 600 secondes au T250 avec le Nikon D3. Pr\u00e9-traitement PI WBBP Ensuite traitement toujours avec PI en lin\u00e9aire: BXT Correct only pour corriger la d\u00e9formation r\u00e9siduelle des \u00e9toiles en bord de champ. Gradient correction Backround neutalization ColorCalibration (Pas SPCC car je ne suis pas parvenu […]<\/p>\n","protected":false},"author":10,"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-10513","post","type-post","status-publish","format-standard","hentry","category-astrophotos"],"_links":{"self":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10513","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\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/comments?post=10513"}],"version-history":[{"count":1,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10513\/revisions"}],"predecessor-version":[{"id":11176,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/posts\/10513\/revisions\/11176"}],"wp:attachment":[{"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/media?parent=10513"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/categories?post=10513"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/groupeastronomiespa.be\/astrogas\/wp-json\/wp\/v2\/tags?post=10513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}