
{"id":292790,"date":"2025-12-04T00:00:00","date_gmt":"2025-12-04T00:00:00","guid":{"rendered":"https:\/\/blog.skylum.com\/increasing-the-resolution-of-the-picture-6-tips-2\/"},"modified":"2026-03-21T08:21:50","modified_gmt":"2026-03-21T08:21:50","slug":"increasing-the-resolution-of-the-picture-6-tips","status":"publish","type":"post","link":"https:\/\/blog.skylum.com\/fr\/increasing-the-resolution-of-the-picture-6-tips\/","title":{"rendered":"Am\u00e9liorer la R\u00e9solution d\u2019une Image : 6 Conseils"},"content":{"rendered":"<p>Le pr\u00e9sent article explique ce qu\u2019est la r\u00e9solution d\u2019une photo et son r\u00f4le en photographie. Nous allons explorer les images en r\u00e9solution standard et en haute r\u00e9solution et vous pr\u00e9senter cinq fa\u00e7ons pratiques d\u2019augmenter la r\u00e9solution d\u2019une image. En particulier, l\u2019article propose un guide \u00e9tape par \u00e9tape sur&nbsp;<a href=\"https:\/\/skylum.com\/fr\/how-to\/how-to-increase-image-resolution\" style=\"\">comment corriger la r\u00e9solution d\u2019une image<\/a> \u00e0 l\u2019aide d\u2019un puissant outil de retouche bas\u00e9 sur l\u2019IA appel\u00e9 Luminar Neo.&nbsp;<\/p><p>\n\n    <div class=\"static-cta-block static-light\">\n        <div class=\"static-cta-block__container\">\n            <a\n                href=\"https:\/\/skylum.com\/luminar\"\n                class=\"static-cta-block__link\"\n                target=\"_self\"\n                data-title=\"Discover Luminar \"\n                rel=\"\">\n                Discover Luminar             <\/a>\n        <\/div>\n    <\/div>\n\n\n<br><\/p><h2>Qu\u2019est-ce que la r\u00e9solution d\u2019image ?&nbsp;<\/h2><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2023\/10\/1697554793652ea16938c848.67302988.webp\" data-pin-nopin=\"true\"><p><\/p><p>La r\u00e9solution d\u2019image correspond \u00e0 la qualit\u00e9 de votre photo exprim\u00e9e par un param\u00e8tre num\u00e9rique. Plus pr\u00e9cis\u00e9ment, elle repr\u00e9sente la quantit\u00e9 de d\u00e9tails visibles sur la photo. Plus la r\u00e9solution est \u00e9lev\u00e9e, plus l\u2019image est d\u00e9taill\u00e9e. Elle se mesure g\u00e9n\u00e9ralement en pixels par unit\u00e9 de surface.&nbsp;<\/p><p>Sachez que les images en haute r\u00e9solution ne sont pas forc\u00e9ment meilleures que les images standard. Le choix de la r\u00e9solution d\u00e9pend du type de photo et de vos objectifs en tant que photographe.&nbsp;<\/p><p>Une r\u00e9solution de 72 DPI (points par pouce) suffit pour produire des photos de taille standard. La plupart des appareils photo num\u00e9riques, y compris les smartphones, capturent des images \u00e0 cette r\u00e9solution. Des dimensions courantes comme 10 \u00d7 15 cm, 15 \u00d7 20 cm, 20 \u00d7 30 cm et 30 \u00d7 45 cm peuvent \u00eatre imprim\u00e9es \u00e0 cette r\u00e9solution. Ces standards conviennent parfaitement aux pages web et aux r\u00e9seaux sociaux : c\u2019est donc l\u2019option \u00e0 privil\u00e9gier si vous n\u2019\u00eates pas un\u00b7e pro et prenez des photos \u00e0 titre personnel.<\/p><p>Les images en haute r\u00e9solution, en revanche, offrent un niveau de d\u00e9tail et une nettet\u00e9 remarquables. Une image de 300 DPI est consid\u00e9r\u00e9e comme de qualit\u00e9 sup\u00e9rieure. De nombreux photographes professionnels recommandent une r\u00e9solution minimale de 150 DPI pour les impressions. C\u2019est l\u2019option la plus courante dans l\u2019\u00e9dition : banni\u00e8res, magazines, affiches, brochures, etc. Le choix entre 150 DPI et 300 DPI d\u00e9pend de la distance de vision et du contenu visuel. Inutile de sacrifier la qualit\u00e9 de l\u2019image pour rendre le texte lisible, et inversement.&nbsp;<\/p><p>Maintenant que nous avons d\u00e9fini la r\u00e9solution photo, voyons ci-dessous comment obtenir une image \u00e0 plus haute r\u00e9solution.&nbsp;<\/p><h2>Comment am\u00e9liorer la r\u00e9solution d\u2019une image : 6 m\u00e9thodes efficaces<img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2023\/10\/1697554802652ea172abb185.10220525.webp\" data-pin-nopin=\"true\"><\/h2><p>M\u00eame sans rien conna\u00eetre \u00e0 la r\u00e9solution, le premier r\u00e9flexe pour mieux voir certains d\u00e9tails est souvent de zoomer sur ces zones. Autrement dit, on modifie la taille de l\u2019image. Si la r\u00e9solution est insuffisante, la photo devient granuleuse (pixellis\u00e9e) et la qualit\u00e9 diminue. Il existe cependant des m\u00e9thodes efficaces pour corriger la r\u00e9solution tout en pr\u00e9servant la qualit\u00e9 d\u2019origine. Et si vous vous demandez : \u00ab Peut-on augmenter la r\u00e9solution d\u2019une image prise avec l\u2019appareil d\u2019un t\u00e9l\u00e9phone ou en faible luminosit\u00e9 ? \u00bb La r\u00e9ponse est oui !<\/p><h3>Luminar Neo<img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2023\/10\/1697554810652ea17a448de0.65046693.webp\" data-pin-nopin=\"true\"><\/h3><p>Luminar Neo, un \u00e9diteur photo propuls\u00e9 par l\u2019IA, s\u2019adresse aussi bien aux d\u00e9butants qu\u2019aux professionnels et simplifie l\u2019am\u00e9lioration de la r\u00e9solution. Son flux de travail est similaire \u00e0 celui de Photoshop (et il peut m\u00eame s\u2019y int\u00e9grer comme plugin). La courbe d\u2019apprentissage est toutefois bien plus douce et l\u2019interface beaucoup plus intuitive, ce qui est particuli\u00e8rement important pour celles et ceux qui d\u00e9couvrent les logiciels de retouche.&nbsp;<\/p><h4>Comment redimensionner une image avec Luminar Neo<\/h4><ol><li aria-level=\"1\"><p role=\"presentation\">Glissez-d\u00e9posez votre image dans l\u2019espace de travail.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Cliquez sur \u00ab Exporter \u00bb dans le menu \u00ab Fichier \u00bb.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Choisissez \u00ab Redimensionner \u00bb puis \u00ab Grand c\u00f4t\u00e9 \u00bb.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Modifiez les dimensions en pixels.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">S\u00e9lectionnez le format souhait\u00e9.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Cliquez sur \u00ab Enregistrer \u00bb.<\/p><\/li><\/ol><ul><\/ul><p><\/p><div class=\"tmp-block cta-block red\"> <div class=\"cta-block__container\"> <h3 class=\"cta-block__title \">Essai gratuit de 7 jours de Luminar Neo, sans engagement<\/h3> <a href=\"https:\/\/skylum.com\/fr\/luminar-trial\" class=\"sk-text btn\">Obtenez-le maintenant<\/a> <\/div> <\/div><h3>Le AI Upscaler de Luminar Neo : transformer les images en HD<\/h3><p>Le AI Upscaler de Luminar Neo ne se contente pas d\u2019agrandir les images : il les am\u00e9liore ! Qu\u2019il s\u2019agisse d\u2019une vieille photo ou d\u2019un clich\u00e9 qui n\u2019a pas bien captur\u00e9 les d\u00e9tails, l\u2019outil est con\u00e7u pour lui redonner vie.&nbsp;<\/p><p>Cet outil utilise des algorithmes avanc\u00e9s pour transformer des photos pixellis\u00e9es ou floues en versions plus nettes et en haute d\u00e9finition. Plut\u00f4t que de jeter ou d\u2019\u00e9viter les images basse r\u00e9solution, l\u2019upscaler en ligne permet de les rendre \u00e0 nouveau utilisables et convaincantes.<\/p><h4>Quand utiliser le AI Upscaler<\/h4><ul><li aria-level=\"1\"><p role=\"presentation\">Am\u00e9liorer d\u2019anciennes photos \u00e0 faible r\u00e9solution.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Optimiser des images t\u00e9l\u00e9charg\u00e9es sur internet susceptibles d\u2019\u00eatre pixellis\u00e9es.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Corriger des photos prises avec des appareils d\u2019entr\u00e9e de gamme ou dans des conditions difficiles o\u00f9 la nettet\u00e9 est compromise.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Pr\u00e9parer des images pour des tirages plus grands n\u00e9cessitant une r\u00e9solution plus \u00e9lev\u00e9e.<\/p><\/li><\/ul><h4>Comment utiliser le AI Upscaler : guide rapide<\/h4><ol><li aria-level=\"1\"><p role=\"presentation\">Ouvrir Luminar Neo : lancez l\u2019application et chargez l\u2019image \u00e0 sur\u00e9chantillonner.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">S\u00e9lectionner l\u2019option Upscale AI : dans l\u2019interface, localisez puis choisissez l\u2019outil \u00ab Upscale AI \u00bb. Le processus d\u00e9marre.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Ajuster selon vos pr\u00e9f\u00e9rences : l\u2019IA fait d\u00e9j\u00e0 un excellent travail, mais vous pouvez affiner le rendu. Utilisez les curseurs ou r\u00e9glages fournis pour am\u00e9liorer clart\u00e9, nettet\u00e9 ou autres aspects.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Pr\u00e9visualiser les modifications : au fil des ajustements, le logiciel affiche un aper\u00e7u en temps r\u00e9el pour comparer l\u2019image am\u00e9lior\u00e9e \u00e0 l\u2019originale.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Enregistrer votre image optimis\u00e9e : une fois satisfait\u00b7e, cliquez sur le bouton \u00ab Partager vers \u00bb. Vous pourrez enregistrer, partager ou exporter la photo au format ou sur la plateforme souhait\u00e9s.<\/p><\/li><\/ol><p>Vous le voyez : en quelques clics, il est possible de rajeunir et d\u2019am\u00e9liorer vos photos afin d\u2019offrir toujours le meilleur rendu !<\/p><div class=\"tmp-block cta-block red\"> <div class=\"cta-block__container\"> <h3 class=\"cta-block__title \">Obtenez une r\u00e9solution sup\u00e9rieure en quelques clics<\/h3> <a href=\"https:\/\/skylum.com\/fr\/luminar\/upscale-ai\" class=\"sk-text btn\">D\u00e9couvrir dans Luminar Neo<\/a><\/div><\/div><h3>Photoshop<\/h3><p>Adobe Photoshop, un outil de retouche polyvalent, est indispensable pour redimensionner des images sans compromettre la qualit\u00e9. La cl\u00e9 de l\u2019ajustement de la r\u00e9solution est le r\u00e9\u00e9chantillonnage, une technique qui consiste \u00e0 ajouter ou supprimer des pixels. Vous pouvez choisir diff\u00e9rentes m\u00e9thodes d\u2019interpolation pour obtenir le r\u00e9sultat souhait\u00e9.&nbsp;<\/p><h4>Principales m\u00e9thodes d\u2019interpolation<\/h4><ul><li aria-level=\"1\"><p role=\"presentation\">Automatique. Dans ce cas, le logiciel choisit comment r\u00e9\u00e9chantillonner l\u2019image selon son type.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Bicubique net. Option pour les r\u00e9ductions lorsque vous souhaitez am\u00e9liorer le rendu en diminuant la taille.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Conserver les d\u00e9tails. Retouche avanc\u00e9e avec r\u00e9duction du bruit contr\u00f4l\u00e9e manuellement.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Pixels voisins. Parfait pour les visuels illustratifs o\u00f9 il faut \u00e9viter le lissage des contours.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Bilin\u00e9aire. Calcule la couleur moyenne des pixels environnants, ce qui donne un rendu plus pixellis\u00e9.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Bicubique. Utilise des d\u00e9grad\u00e9s tonals plus doux que les deux m\u00e9thodes pr\u00e9c\u00e9dentes.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Bicubique plus lisse. Offre un rendu lisse lors des agrandissements.<\/p><\/li><\/ul><h4>Guide pas \u00e0 pas : redimensionner une image dans Photoshop<\/h4><p>Vous pouvez redimensionner votre image sans modifier le nombre de pixels. Proc\u00e9dez ainsi :<\/p><ol><li aria-level=\"1\"><p role=\"presentation\">Lancez Photoshop et ouvrez l\u2019image.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Allez dans le menu \u00ab Image \u00bb et s\u00e9lectionnez \u00ab Taille de l\u2019image \u00bb.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">D\u00e9cochez \u00ab R\u00e9\u00e9chantillonnage \u00bb pour conserver la largeur et la hauteur actuelles.<\/p><\/li><li aria-level=\"1\"><p role=\"presentation\">Ajustez la largeur et la hauteur aux valeurs souhait\u00e9es.<\/p><\/li><\/ol><h3>Applications mobiles<\/h3><p>Plusieurs applications mobiles permettent d\u2019\u00e9diter et de redimensionner les images, notamment Pixlr, PicsArt, Snapseed, Adobe Photoshop Express, Instasize Photo Editor, Mendr et Image Size.&nbsp;<\/p><p>\n\n    <div class=\"static-cta-block static-cta-block--dark\" style=\"background-image: url('https:\/\/blog.skylum.com\/wp-content\/uploads\/2024\/11\/image-2.webp');\">\n        <div class=\"static-cta-block__container static-cta-block__container--wide\">\n                            <p class=\"static-cta-block__title\">\n                    5 Fa\u00e7ons de Rendre les Images Floues Claires et Nettes                <\/p>\n                        <a\n                href=\"https:\/\/blog.skylum.com\/fr\/ways-to-make-blurry-image-clear-and-sharp\/\"\n                class=\"static-cta-block__link static-cta-block__link--more\"\n                data-title=\"En savoir plus\"\n                data-ga-action=\"click\"\n                data-ga=\"ec:Site.ea:article_learn_more_click.el:learn_more-ways_to_make_blurry_image_clear_and_sharp\">\n\n                En savoir plus            <\/a>\n        <\/div>\n    <\/div>\n\n\n<br><\/p><p>Ces applications sont conviviales et id\u00e9ales pour des am\u00e9liorations rapides en d\u00e9placement. La plupart sont gratuites et s\u2019installent en un instant si vous devez retoucher une photo en urgence. C\u2019est aussi une excellente option si vous retouchez ponctuellement, en amateur, et que l\u2019optimisation d\u2019images ne fait pas partie de votre routine quotidienne.<\/p><h3>R\u00e9glages de l\u2019appareil photo<img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2023\/10\/1697554830652ea18e4f7238.64893934.webp\" data-pin-nopin=\"true\"><\/h3><p>Certains smartphones permettent d\u2019ajuster la r\u00e9solution d\u2019image dans les r\u00e9glages de l\u2019appareil photo. M\u00eame si ces r\u00e9glages n\u2019offrent pas le m\u00eame niveau de contr\u00f4le que des applications d\u00e9di\u00e9es, ils constituent une option pratique pour des ajustements rapides.<\/p><h3>Outils en ligne de redimensionnement<\/h3><p>Des plateformes en ligne comme Image Resizer offrent un moyen pratique d\u2019augmenter la r\u00e9solution sans installer de logiciel suppl\u00e9mentaire sur votre smartphone ou votre PC. Vous pouvez y augmenter la r\u00e9solution autant de fois que vous le souhaitez et retoucher plusieurs images simultan\u00e9ment si n\u00e9cessaire. T\u00e9l\u00e9versez votre photo, ajustez les dimensions, puis t\u00e9l\u00e9chargez l\u2019image redimensionn\u00e9e. Ces outils en ligne sont parfaits pour des retouches rapides et ponctuelles.<\/p><h2>Conclusion<img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/blog.skylum.com\/wp-content\/uploads\/2023\/10\/1697554835652ea193cdc909.77449142.webp\" data-pin-nopin=\"true\"><\/h2><p>Vous savez d\u00e9sormais comment obtenir des images \u00e0 plus haute r\u00e9solution. Les m\u00e9thodes pr\u00e9sent\u00e9es ici constituent des outils polyvalents dans votre arsenal photographique et vous permettent d\u2019adapter et d\u2019am\u00e9liorer vos images selon vos besoins. Que vous envisagiez une carri\u00e8re professionnelle, que vous immortalisiez des souvenirs pr\u00e9cieux ou que vous laissiez libre cours \u00e0 votre cr\u00e9ativit\u00e9, la capacit\u00e9 \u00e0 contr\u00f4ler et optimiser la r\u00e9solution est inestimable.<\/p><p>Ainsi, que vous capturiez la photo parfaite avec votre smartphone, utilisiez un logiciel avanc\u00e9 comme Photoshop ou optiez pour des solutions innovantes bas\u00e9es sur l\u2019IA telles que Luminar Neo, vos images v\u00e9hiculeront d\u00e9sormais votre message avec la plus grande clart\u00e9 et le meilleur impact.<\/p>","protected":false},"excerpt":{"rendered":"<p>\u00c0 l\u2019\u00e8re de la photographie num\u00e9rique, la demande d\u2019images haute r\u00e9solution ne cesse d\u2019augmenter. Savoir am\u00e9liorer la r\u00e9solution devient alors indispensable pour tous les passionn\u00e9s, amateurs comme professionnels.<\/p>\n","protected":false},"author":85,"featured_media":292791,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_eb_attr":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-292790","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Am\u00e9liorer la R\u00e9solution d\u2019une Image : 6 Conseils<\/title>\n<meta name=\"description\" content=\"Ne vous contentez pas d\u2019une qualit\u00e9 m\u00e9diocre ! 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