12 Replies Latest reply: Oct 21, 2009 10:33 AM by Old Toad
Richard Hagan Level 1 Level 1 (25 points)
Has anyone noticed that after editing a RAW picture in iPhoto that it compresses to less than half it's size?
If I have a file that that is 11.2mb, after the edit it drops to 1.9mb.

Is this a setting I am missing?

Message was edited by: Richard Hagan

MAcbook Pro, Mac OS X (10.6.1)
  • Terence Devlin Level 10 Level 10 (128,870 points)
    1. iPhoto does not compress your RAW images or touch them in any way. (Want to check? File -> Export: *Kind - Original*)

    2. WHat's happening is that iPhoto is processing your RAWs and saving the output as a jpeg file. (You know, you can save it as a tiff, if you prefer)

    3. As I'm sure you understand, no application can Save a RAW file. A RAW isn't even a File it's just a sensor dump from your camera. So to do anything with this data = print it, share it whatever - it has to be processed into a usable form. So when you edit the RAW the output is saved in a usable form - in this case a jpeg.

    This is all explained in the Help.

    Regards

    TD
  • Richard Hagan Level 1 Level 1 (25 points)
    Thanks Terence, the size of the file is what matters to me, in the previous versions of iLife this never happened and after editing a 11.2mb file it stayed that way or increased due to certain changes.

    I guess I will need to go to a different program to do my editing. I am not a heavy user and it was nice to use iPhoto.
  • Terence Devlin Level 10 Level 10 (128,870 points)
    the size of the file is what matters to me, in the previous versions of iLife this never happened and after editing a 11.2mb file it stayed that way or increased due to certain changes.


    Not unless you were saving the output as tiffs. And this will be the case regardless of whatever oyu use to process the RAWs

    Regards

    TD
  • LarryHN Level 9 Level 9 (61,305 points)
    You need to re-read TS's response

    Your RAW files are not being reduced in size nor are the being modified in any way -- and never have been

    You cannot and never have been able to edit a RAW file - your edited file is a different format because you can not save RAW

    There is an iPhoto preference to save edited RAW files as TIFFs which are much bigger than JPEGs

    Use what every program you want - but it would be good to read the response and understand it as a help in making your decision

    LN
  • Richard Hagan Level 1 Level 1 (25 points)
    Thanks guys, I am confused now!
    When I select a photo the info window at the bottom right of iPhoto shows the title, date and so on and then at the bottom of that it says:

    title IMG_7311.CR2
    kind Canon RAW
    size 2586 x 3892
    12.5MB

    After editing it says:

    title IMG_7311.CR2
    kind Canon RAW
    size 2586 x 3892
    4.1MB

    If I look in my iPhoto library or select "show file" it says it's a CR2 file? Where would it save it as a jpeg and would it not say that is is a jpeg?

    I am sorta new to this and I know what I see and can read, in my previous version of iLife the size of the file never changed after an edit.
  • Terence Devlin Level 10 Level 10 (128,870 points)
    The problem here is that iPhoto is fibbing to you

    Here's test:

    Edit one of these pics then go

    File -> Export and set the Kind to Original - This will get you the CR2 file, full size

    Now go

    File -> Export and this time set the Kind to Current - what does that produce?

    Regards

    TD
  • Old Toad Level 10 Level 10 (121,365 points)
    Yes, it will show a smaller size. But if you drag that thumbnail to the desktop you'll find you have a jpg file which is the results of your editing the raw file in iPhoto. What iPhoto is reporting is the file size of the jpg that will created if you need to produce an file of that edited RAW file. Until you drag it to the desktop the edit (or rather edit instructions) are kept in iPhoto's database files and iPhoto uses that information to display the edited version in iPhoto.


  • brianv7 Level 1 Level 1 (0 points)
    i have the same prob, have a 300dpi photo after edit its 72 dpi, iexported in both tiff and png and same dpi as before ??
  • Terence Devlin Level 10 Level 10 (128,870 points)
    It's not the same problem. See my reply in your own thread.

    Regards

    TD
  • Richard Hagan Level 1 Level 1 (25 points)
    When I tried to email the photo it was over 60mb, what the **** is going on? is it a JPG or a TIFF or what?
  • Terence Devlin Level 10 Level 10 (128,870 points)
    Sounds like a tiff.

    I really don;t understand your question, you will need to give us some context.

    Regards

    TD
  • Old Toad Level 10 Level 10 (121,365 points)
    ReadThe Myth of DPI. It explains much of that.