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jpg photo orientation

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Message        philbond87          Post subject: jpg photo orientationPosted: 
Wed Oct 24, 2012 10:50 am                         
Joined: Sat Feb 14, 2009 3:30 am
Posts: 13                Please forgive me if this isn't the proper place for 
this question. 

Is there an easy way to programmatically determine the orientation of a jpg 
from a digital camera?   
                             Top                rowlands          Post subject: 
Re: jpg photo orientationPosted: Wed Oct 24, 2012 9:43 pm                       
          
Joined: Fri Sep 30, 2005 11:00 am
Posts: 500
Location: Beautiful Taiwan                This is a good place to ask this 
question.

What you need to do is to read the image meta data, there are classes and maybe 
some code snippets do this. I used to sell an object for reading ( and writing 
) the image meta data for images.

If you like to do things yourself, you can dig up the specifications for JPEG 
and TIFF (as JPEG meta data is TIFF meta data) and write your own code to do 
this. If you're developing a Mac only application, then take a look at writing 
code to access Apple's Core Graphics, as Apple have a pretty solid meta data 
system built-in.

Lastly, if you're developing a Mac only application, and don't want to write 
your own code, you could use something like the MBS plugin to access Apple's 
Core Graphics and read the meta data from a JPEG.      
_________________
Sam Rowlands
'09 MBP 17" @ 10.7 & '07 iMac 24" @ 10.8, RB2012r1
http://www.ohanaware.com/
AppWrapper - Prepare Apps for Mac App Store & OS X 10.8 - 
http://www.ohanaware.com/appwrapper/  
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