{"id":9348,"date":"2025-03-25T11:59:37","date_gmt":"2025-03-25T10:59:37","guid":{"rendered":"https:\/\/chriswright.photography\/?p=9348"},"modified":"2025-04-01T12:23:29","modified_gmt":"2025-04-01T11:23:29","slug":"mastering-frequency-separation-for-landscape-photography","status":"publish","type":"post","link":"https:\/\/chriswright.photography\/fr\/mastering-frequency-separation-for-landscape-photography\/","title":{"rendered":"Ma\u00eetriser la s\u00e9paration des fr\u00e9quences pour la photographie de paysage"},"content":{"rendered":"<p class=\"wp-block-paragraph\">La s\u00e9paration de fr\u00e9quence est une technique fr\u00e9quemment utilis\u00e9e par les photographes portraitistes pour \u00e9liminer les imperfections de la peau. Cependant, cette technique est \u00e9galement utile pour la photographie de paysage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">J&#039;ai appris la s\u00e9paration de fr\u00e9quence pour la photographie de paysage dans Adobe Photoshop, et son impl\u00e9mentation explique parfaitement pourquoi cette technique est si complexe. Elle est complexe et n\u00e9cessite des connaissances techniques approfondies. Affinity Photo a impl\u00e9ment\u00e9 un filtre de s\u00e9paration de fr\u00e9quence beaucoup plus simple \u00e0 utiliser.<\/p>\n\n\n\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Table des mati\u00e8res<\/h2><nav><ul><li><a href=\"#video\">Vid\u00e9o<\/a><\/li><li><a href=\"#what-is-frequency-separation\">Qu&#039;est-ce que la s\u00e9paration de fr\u00e9quence ?<\/a><\/li><li><a href=\"#what-is-frequency-separation-used-for\">\u00c0 quoi sert la s\u00e9paration de fr\u00e9quence\u00a0?<\/a><ul><li><a href=\"#portrait-photography-removal-of-blemishes-from-skin\">Photographie de portrait<\/a><\/li><li><a href=\"#landscape-photography\">Photographie de paysage<\/a><\/li><\/ul><\/li><li><a href=\"#how-frequency-separation-works\">Comment fonctionne la s\u00e9paration de fr\u00e9quence<\/a><\/li><li><a href=\"#lens-flare-removal\">Suppression des reflets de l&#039;objectif<\/a><\/li><li><a href=\"#subscribe\">S'abonner...<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"video\">Vid\u00e9o<\/h2>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Ma\u00eetriser la s\u00e9paration des fr\u00e9quences pour des photos de paysages \u00e9poustouflantes (avec Affinity Photo 2.6)\" width=\"720\" height=\"405\" src=\"https:\/\/www.youtube.com\/embed\/SWWJqRIi0OA?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"what-is-frequency-separation\">Qu&#039;est-ce que la s\u00e9paration de fr\u00e9quence ?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">L&#039;id\u00e9e derri\u00e8re la s\u00e9paration des fr\u00e9quences est que si nous s\u00e9parons les informations de couleur de la structure (forme et texture), nous pouvons cloner des zones de couleur ou de structure, obtenant ainsi s\u00e9par\u00e9ment des corrections parfaitement homog\u00e8nes sans aucun des dangers de r\u00e9p\u00e9tition de motifs ou de couleurs mal assorties qui accompagnent l&#039;utilisation de l&#039;outil de clonage seul.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dans Affinity Photo, le filtre g\u00e9n\u00e8re deux nouveaux calques \u00e0 partir d&#039;un calque de pixels. Les deux calques sont\u00a0: Haute Fr\u00e9quence, contenant les informations structurelles, et Basse Fr\u00e9quence, contenant les informations de couleur. Ces deux calques peuvent \u00eatre regroup\u00e9s et appliqu\u00e9s avec des masques pour localiser l&#039;effet.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"what-is-frequency-separation-used-for\">\u00c0 quoi sert la s\u00e9paration de fr\u00e9quence\u00a0?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"portrait-photography-removal-of-blemishes-from-skin\">Photographie de portrait<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c9limination des imperfections de la peau<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"landscape-photography\">Photographie de paysage<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u00c9liminer les irr\u00e9gularit\u00e9s de texture (par exemple le sable) tout en conservant la couleur.<\/li>\n\n\n\n<li>Nettet\u00e9 (utilisation du calque haute fr\u00e9quence avec un masque)<\/li>\n\n\n\n<li>Effet Orton (encore une fois, en utilisant la couche haute fr\u00e9quence)<\/li>\n\n\n\n<li>Suppression des reflets de l&#039;objectif (clonage dans la couche basse fr\u00e9quence)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"how-frequency-separation-works\">Comment fonctionne la s\u00e9paration de fr\u00e9quence<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">J&#039;ai d\u00e9crit pourquoi cela fonctionne, mais les aspects pratiques de l&#039;utilisation cr\u00e9ative de cette technique restent encore un peu obscurs. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Comme nous le savons, les calques dans Affinity et Photoshop fonctionnent de haut en bas. Nous utilisons des masques pour r\u00e9v\u00e9ler et masquer les informations d&#039;un calque. Imaginons donc la photo RAW dans le calque de base. En cr\u00e9ant un nouveau calque et en appliquant un filtre Vibrance, cette vibrance sera appliqu\u00e9e \u00e0 l&#039;ensemble du calque. Nous utilisons toujours le calque de base pour fournir les informations brutes, mais la couleur est parfois rehauss\u00e9e par les informations mises \u00e0 jour dans le nouveau calque.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Si nous cr\u00e9ons ensuite un masque sur le nouveau calque et le peignons en noir, toutes les informations du nouveau calque seront masqu\u00e9es et nous verrons directement le calque de base. En appliquant ensuite un pinceau blanc sur le masque, nous pourrons \u00ab\u00a0peindre\u00a0\u00bb s\u00e9lectivement les zones du filtre de vibrance \u00e0 mettre en valeur. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Consid\u00e9rons maintenant les deux calques cr\u00e9\u00e9s par le filtre de s\u00e9paration de fr\u00e9quences. L&#039;un est la texture, l&#039;autre la couleur. Nous pouvons appliquer des corrections \u00e0 la texture ou \u00e0 la couleur, ind\u00e9pendamment l&#039;une de l&#039;autre. C&#039;est bien plus efficace qu&#039;un simple clonage, car cela \u00e9vite le risque d&#039;introduire des motifs r\u00e9p\u00e9titifs (structure) dans une correction destin\u00e9e \u00e0 corriger la couleur. Prenons l&#039;exemple du Lens Flare.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"lens-flare-removal\">Suppression des reflets de l&#039;objectif<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Le flare est d\u00fb \u00e0 certaines fr\u00e9quences lumineuses qui rebondissent \u00e0 l&#039;int\u00e9rieur de l&#039;objectif. On l&#039;observe g\u00e9n\u00e9ralement lorsque l&#039;on photographie en plein soleil et que le pare-soleil ne prot\u00e8ge pas suffisamment l&#039;objectif. Sur la photo, il se manifeste par des taches lumineuses circulaires qui semblent avoir \u00e9t\u00e9 filtr\u00e9es par un filtre rouge, bleu ou vert.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Il est parfois possible de supprimer les reflets d&#039;objectif avec l&#039;outil de clonage, mais cet outil est parfois trop grossier. Prenons l&#039;exemple d&#039;un reflet d&#039;objectif sur le tronc d&#039;un arbre ou sur une sculpture r\u00e9alis\u00e9e dans un mat\u00e9riau tr\u00e8s textur\u00e9. Dans les deux cas, nous conservons plus facilement les motifs du mat\u00e9riau en clonant uniquement les informations de couleur provenant d&#039;autres parties de l&#039;arbre ou de la sculpture.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les cas plus complexes o\u00f9 le flare chevauche plusieurs \u00e9l\u00e9ments de la photographie peuvent \u00eatre trait\u00e9s avec un outil de courbes, en utilisant les courbes RVB pour supprimer la couleur du flare. Cette m\u00e9thode est beaucoup plus chronophage, mais parfois plus efficace que la s\u00e9paration fr\u00e9quentielle.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vous pouvez suivre ce processus \u00e9tape par \u00e9tape dans la vid\u00e9o sur cette page.<\/p>\n\n\n<style>.kb-row-layout-id3919_a50959-24 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id3919_a50959-24 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id3919_a50959-24 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);max-width:var( --global-content-width, 1290px );padding-left:var(--global-content-edge-padding);padding-right:var(--global-content-edge-padding);padding-top:35px;padding-bottom:25px;grid-template-columns:repeat(2, minmax(0, 1fr));}.kb-row-layout-id3919_a50959-24 > .kt-row-layout-overlay{opacity:0.30;background-color:var(--global-palette7, #EDF2F7);}@media all and (max-width: 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.kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column3919_1d5d28-64 inner-column-2\"><div class=\"kt-inside-inner-col\">\n<h2 class=\"wp-block-heading\" id=\"subscribe\">S'abonner...<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Je vous tiendrai au courant avec des mises \u00e0 jour mensuelles r\u00e9guli\u00e8res sur les ateliers, les cours, les guides et les revues.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Inscrivez-vous ici et obtenez des tarifs sp\u00e9ciaux sur tous les cours et promenades photo en 2026<\/p>\n<\/div><\/div>\n\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>La s\u00e9paration de fr\u00e9quence est une technique tr\u00e8s utilis\u00e9e par les photographes portraitistes pour effacer les imperfections de la peau. Cependant, elle est \u00e9galement utile pour la photographie de paysage. J&#039;ai appris la s\u00e9paration de fr\u00e9quence pour la photographie de paysage dans Adobe Photoshop, et son impl\u00e9mentation explique pr\u00e9cis\u00e9ment pourquoi cette technique est si m\u00e9connue. Elle est complexe et requiert des comp\u00e9tences techniques approfondies\u2026<\/p>\n<div class=\"excerpt_sharing_after_output\">\n<div class=\"kt_simple_share_container kt-social-align-center kt-socialstyle-style_03 kt-social-size-normal kt-social-bg-transparent\"><a class=\"kt_facebook_share\" data-placement=\"bottom\" data-placement-mobile=\"bottom\" aria-label=\" Facebook\" data-tooltip=\" Facebook\" href=\"https:\/\/www.facebook.com\/sharer.php?u=https:\/\/chriswright.photography\/fr\/mastering-frequency-separation-for-landscape-photography\/\" target=\"_blank\"><span class=\"kt-social-svg-icon\"><svg viewbox=\"0 0 264 512\"  fill=\"currentColor\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M76.7 512V283H0v-91h76.7v-71.7C76.7 42.4 124.3 0 193.8 0c33.3 0 61.9 2.5 70.2 3.6V85h-48.2c-37.8 0-45.1 18-45.1 44.3V192H256l-11.7 91h-73.6v229\"\/><\/svg><\/span><\/a><a class='kt_pinterest_share kt_no_pop_window' data-toggle='tooltip' data-placement='bottom' 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