• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
Re: Dabbling with EXIF
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Dabbling with EXIF


  • Subject: Re: Dabbling with EXIF
  • From: Roger Howard <email@hidden>
  • Date: Mon, 26 Jun 2006 14:40:53 -0700


On Jun 26, 2006, at 1:40 PM, Jay Louvion wrote:

On 26.6.2006 17:41, entity "Martin Orpen" <email@hidden> spake
thus:


On 26 Jun 2006, at 13:59, Jay Louvion wrote:

Does any one know if it is possible to retrieve EXIF infos from one
jpeg file and impose (write) them to another using AS ?

What would be the point of that? Apart from a small number of unusual
tags like "copyright" most of the information is specific to each shot.


Did you mean that you wanted to be able to copy and set the IPTC
information?

Regards

Curiosity puts the cats life on the line, Mr. Orpen... :-)

The reason why I ask this question, is that Photoshop CS2 offers a way of
blending photos with different exposures together using what is called HDR
fusion. This means that shots where the highlights are perfect can be
automatically blended in with shots wich are correctly exposed and shots
where the lowlights are just right... The problem comes from the fact that
the CS2 function uses the camera settings of the Exif info in the files used
to calculate the ideal image.


I would LOVE to use this technique in the creation of panoramics, which I
often make. For the time being, I would have to do an HDR fusion on every
one of the twelve shots I use for a full 360 panoramic. It would be
wonderful to make three or four panoramics of differents exposures and then
export the flattened image, apply exif data to the resulting file and do an
HDR fusion between the three (or four) flattened images and conclude my
panoramic using the final HDR "fused" flattened image.

Jay,

I have resisted responding until now, but since it seems we do very similar things with our images I will chime in.

I'm a panoramic photographer as well; I copy all embedded metadata -- EXIF, IPTC, XMP -- from the first shot in a panoramic set of source files into the final stitched TIFF, since the stitching software does not do this automatically. There are very obvious reasons to do this, even if not everyone can imagine why! In my case I often shoot bracketed panoramas - I stitch each exposure set, resulting in three stitched TIFFs. Sounds like you do similar.

I use an applet I wrote that uses ExifTool from Phil Harvey - ExifTool is a Perl-based shell script and Perl module, so I call it from AppleScript via do shell script. I'd be happy to share this applet with you, or just point you in the right direction and let you script it yourself.

The only caveat is you don't actually want to copy *all* metadata - for instance, there are explicit values for image width/height that are stored in EXIF fields (as well as in the file format headers themselves). Obviously you don't need to copy this info over, and if you do it'll tend to be wrong!

ExifTool can be downloaded here:

http://www.sno.phy.queensu.ca/~phil/exiftool/

Let me know if you need more help, or just want a copy of my applet. It accepts one or more dropped files (the files which you want to copy metadata *into*) and then prompts to select a file that will serve as the source for the metadata. This works fine with JPEG, TIFF, DNG and most RAW formats as source, and basically the same set of file formats as destination (though I've never actually edited metadata in RAW formats).

-R
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Applescript-users mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden


References: 
 >Re: Dabbling with EXIF (From: Jay Louvion <email@hidden>)

  • Prev by Date: Re: Dabbling with EXIF
  • Next by Date: RE: Down grading from 10.3.9 to 10.2.8
  • Previous by thread: Re: Dabbling with EXIF
  • Next by thread: Re: Dabbling with EXIF
  • Index(es):
    • Date
    • Thread