From 390d4cb4241486175e123ef19888ba1723b9afec Mon Sep 17 00:00:00 2001 From: "Michael J. Chudobiak" Date: Fri, 11 May 2012 09:22:00 -0400 Subject: [PATCH] specify that orientation metadata should be respected --- thumbnail/thumbnail-spec.sgml | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-) diff --git a/thumbnail/thumbnail-spec.sgml b/thumbnail/thumbnail-spec.sgml index 091b5d1..cb539b6 100644 --- a/thumbnail/thumbnail-spec.sgml +++ b/thumbnail/thumbnail-spec.sgml @@ -223,6 +223,15 @@ possible quality when creating the thumbnail. The exact meaning of this is left to the specific program but it should consider applying antialiasing. + + If the original file contains metadata affecting the interpretation + of the image, it should be respected as much as possible. In particular, + metadata specifying the orientation of the original image data should + always be respected. The image data should be transformed as specified by the + metadata before generating the thumbnail. JPEG files commonly have Exif + orientation tags. TIFF files may also have Exif orientation tags, although + this is less common. It is less critical, but still desirable, to respect + other image metadata, such as white balance information. Thumbnail Attributes -- 1.7.7.6