NoOp wrote:
On 05/13/2012 01:33 PM, David E. Ross wrote:
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.
I think you may be looking for the Orientation Tag? Dec 274 Hex 112.
See the EXIF spec(s) 2.2 or 2.3.
This may be of some use (I've not tried it - yet):
<https://addons.mozilla.org/en-US/firefox/addon/exif-viewer/developers>
<https://addons.mozilla.org/en-US/firefox/addon/exif-viewer/>
Steve Jobs was a genius as a marketing man, not as a computer scientist :)
--
~Vink
GerardJan Vinkesteijn VRI
http://vinkesteijn.info
mailto://g.j.f.vinkeste...@hotmail.es
http://ciudadpatricia.com
on Linux
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