Hi all,
Here's another patch to consider for the thumbnail spec, requiring that
thumbnailers respect the orientation tag in the image metadata, and
encouraging the use of other image metadata (white balance, etc).
https://bugs.freedesktop.org/show_bug.cgi?id=49798
Comments?
- Mike
>From 390d4cb4241486175e123ef19888ba1723b9afec Mon Sep 17 00:00:00 2001
From: "Michael J. Chudobiak" <[email protected]>
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.</para>
+
+ <para>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.</para>
</sect2>
<sect2 id="addinfos"><title>Thumbnail Attributes</title>
--
1.7.7.6
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