{"id":1532,"date":"2017-04-21T07:39:39","date_gmt":"2017-04-21T06:39:39","guid":{"rendered":"http:\/\/humm.loverde.fr\/?p=1532"},"modified":"2019-08-09T08:08:51","modified_gmt":"2019-08-09T07:08:51","slug":"resolution-dimension-et-ppi","status":"publish","type":"post","link":"https:\/\/humm.loverde.fr\/?p=1532","title":{"rendered":"Image: r\u00e9solution, dimension et PPI"},"content":{"rendered":"

Quand on parle de r\u00e9solution et de dimension d’une image il faut distinguer l’image en tant que fichier sur l’ordinateur ou sur la carte m\u00e9moire de l’appareil photo et l’image imprim\u00e9e.<\/p>\n

\"Dimension
Dimension et r\u00e9solution<\/figcaption><\/figure>\n

La dimension d’une image num\u00e9rique (le fichier) est toujours donn\u00e9e en pixels. Exemple 6016×4000 pixels.
\nLa r\u00e9solution de cette image sera de 24064000 pixels soit 24 M\u00e9gapixels. Le m\u00e9gapixel est utilis\u00e9 par les fabricants d’appareils photo num\u00e9riques pour donner la r\u00e9solution de leurs appareils.<\/p>\n

La taille de l’image imprim\u00e9e est donn\u00e9e en cm ou en pouce (inch). Par exemple 10×15 cm pour une photo petit format.
\nLa r\u00e9solution de l’imprimante est donn\u00e9e en DPI (dot per inch) ou PPI (pixel per inch) le terme exact.
\nOn estime, g\u00e9n\u00e9ralement, qu’une r\u00e9solution de 300 PPI est suffisante pour une bonne qualit\u00e9 d’impression. 300 PPI = 300\/2,54 = 118,11 pixels par cm.
\nNotre photo de 6016×4000 pixels pourra avoir une dimension maximale \u00e0 l’impression de 6016\/118,11 = 50.94 cm sur 4000\/118,11 = 33.87 cm.<\/p>\n

\"R\u00e9solution,
R\u00e9solution, dimension et PPI (ou DPI)<\/figcaption><\/figure>\n

L’indication en PPP (en fran\u00e7ais point par pouce) ou PPI trouv\u00e9e dans les propri\u00e9t\u00e9s d’un fichier image dans l’explorateur Windows n’a aucun sens.
\nUne image de 4208×2368 pixels en 300 PPI de r\u00e9solution aura une taille d’impression maximale de 35,63 cm par 19,2 cm.
\nDonc quelles que soient les indications sur les propri\u00e9t\u00e9s de l’image 72 PPI ou autres chiffres, pour la taille maximale \u00e0 l’impression il faudra prendre en compte la taille en pixel et 300 PPI ou 118,11 pixels par cm.<\/p>\n

Tr\u00e8s inspir\u00e9 de: http:\/\/www.fmedda.com\/fr\/article\/dpi_ppi<\/p>\n","protected":false},"excerpt":{"rendered":"

Quand on parle de r\u00e9solution et de dimension d’une image il faut distinguer l’image en tant que fichier sur l’ordinateur … <\/p>\n","protected":false},"author":1,"featured_media":1573,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[544,989],"tags":[454,453,450,451,452,455],"class_list":["post-1532","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-informatique","category-photo","tag-dimensions","tag-dpi","tag-pixel","tag-points-par-pouce","tag-ppi","tag-resolution"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/humm.loverde.fr\/wp-content\/uploads\/2017\/04\/IMG_1131.jpg?fit=330%2C296&ssl=1","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p9whbF-oI","jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":8385,"url":"https:\/\/humm.loverde.fr\/?p=8385","url_meta":{"origin":1532,"position":0},"title":"R\u00e9solution et dimensions d’une photo","author":"cloverde","date":"27 mai 2023","format":false,"excerpt":"Quand on parle de r\u00e9solution et de dimension il faut distinguer l\u2019image en tant que fichier sur l\u2019ordinateur ou sur la carte m\u00e9moire de l\u2019appareil photo et l\u2019image imprim\u00e9e. 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