On 5/13/12 12:30 PM, Ant wrote:
> On 5/13/2012 11:18 AM PT, David E. Ross typed:
>>
>> Photos taken with the iPhone upside-down or sideways are automatically
>> reoriented when displayed by the iPhone.  There is a flag in the image
>> file that indicates the orientation of the iPhone when the photo was
>> taken and a sensor in the iPhone that indicates the current orientation.
>>
>> There has been much debate about whether to reorient photos in TBird and
>> SeaMonkey's mail-news according the the flag.  See bug #298619 at
>> <https://bugzilla.mozilla.org/show_bug.cgi?id=298619>.
> 
> Wow! I thought there was something wrong with my old computer/SeaMonkey! 
> Do I assume other e-mail clients, beside Mozilla's, do this too? I am 
> getting more and more iPhone's sent photographs/photos. these days. :(

I don't know about other E-mail clients.  I understand that not all
digital cameras set the EXIF flag, especially older cameras.

The real problem is that there are few (if any) tools to tweak the EXIF
flag.  Thus, a photo that has been manually rotated (e.g., via
Micro$oft's Photo Editor) will be again rotated -- incorrectly -- by an
application that does check the EXIF flag because the sender was not
able to reset that flag.

Frankly, I still consider photos from phones to be of poorer quality
than photos from an actual camera.  I use a Canon digital camera and do
not have any kind of smart phone.  I always view my photos and often
resize and crop them before sending them via E-mail.  In the process, I
manually rotate those that require reorientation.

I have yet to find a specification for the EXIF flag.  Thus, I cannot
manually reset the flag with my hex editor if I manually rotate a photo.

-- 

David E. Ross
<http://www.rossde.com/>.

Anyone who thinks government owns a monopoly on inefficient, obstructive
bureaucracy has obviously never worked for a large corporation.
© 1997 by David E. Ross
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