Utilisez l'outil Recadrage pour modifier le rapport L/H d'une image et la redresser, et ainsi améliorer la composition.
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Utilisez l'outil Recadrage pour modifier le rapport L/H d'une image et la redresser, et ainsi améliorer la composition.
Le recadrage permet d'exclure du contenu indésirable sur les bords, de changer la forme d'une photo dans un but précis ou encore d'embellir la composition. Dans Lightroom, le recadrage n'est pas définitif. Il peut être modifié ultérieurement.
Recadrage d'une photo
Lorsque vous activez l'outil Recadrage dans Lightroom, une zone de recadrage s'affiche autour de l'image. Elle sert à modifier la taille et la forme de la photo. Vous pouvez aussi déplacer la photo pour choisir la partie de l'image à conserver ou masquer. La zone de recadrage se présente sous forme de grille pour vous aider à tirer parti de la règle des tiers, une technique vieille de plusieurs siècles qui permet d'améliorer les compositions artistiques.
Modification du rapport L/H ou de la forme du recadrage
Le rapport L/H de la zone de recadrage détermine la forme de la photo. Par exemple, un rapport L/H de 1 x 1 produit une image carrée. Le rapport L/H ne doit pas être confondu avec les dimensions : une image carrée, dont le rapport L/H est de 1 x 1, peut aussi bien mesurer 10 pixels par 10 que 10 cm par 10.
Vous pouvez appliquer un rapport L/H standard, comme 1 x 1 ou 4 x 5, en le sélectionnant directement dans le menu correspondant du panneau Recadrage. Dans ce cas, la zone de recadrage conserve ces proportions, indépendamment de sa taille, que l'on ajuste en déplaçant ses bords.
Redressement d'une photo
Si une photo est légèrement de travers, vous pouvez corriger le problème via les commandes de redressement du panneau Recadrage. Dans certains cas, il suffit de cliquer sur le bouton Auto au-dessus du curseur Désincliner. Si le résultat ne vous convient pas, vous pouvez ajuster la rotation manuellement, soit en déplaçant le curseur du panneau Recadrage, soit en cliquant sur un angle de la zone de recadrage, puis en le faisant glisser dans le sens de rotation souhaité.
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