Page 2 of 2 FirstFirst 1 2
Results 11 to 15 of 15

Thread: Exif Info lost after conversion NEF -> JPG

  1. #11
    IV Newbie
    Join Date
    Apr 2009
    Posts
    7
    Version
    IrfanView 4.23
    OS
    32-bit Win 2000
    CPU Cores
    1

    Default

    Quote Originally Posted by Skippybox View Post
    So, perhaps the coding needs updating to do this.
    Apparently so. Since I see others complaining about exif data being stripped when going from various formats to JPG, perhaps we should bring this to the attention of the powers that be? How to do that?

    Quote Originally Posted by Skippybox View Post
    Have you tried XnView instead or ExifToolGUI to restore the metadata?
    I use ExifTool, and of course it can save/restore exif data. But the workflow is much simpler/smoother converting file type/size/whatever in one pass with a tool like IrfanView or Xnview.

    BTW, thanks for the pointer to Xnview. I had not been aware of it. Very slick, and it does do conversions retaining the exif data. Nevertheless, I would really like to see that capability in IV.

  2. #12
    Professional User Skippybox's Avatar
    Join Date
    Jul 2008
    Location
    Detroit, MI USA
    Posts
    2,030
    Version
    IrfanView 4.25
    OS
    32-bit Win XP Home SP2
    CPU Cores
    1

    Default

    Quote Originally Posted by daveg View Post
    ...perhaps we should bring this to the attention of the powers that be? How to do that?
    E-mail Irfan Skiljan, the author. Look for the address in the upper right corner of the homepage or press A in IrfanView.

  3. #13
    Moderator Sjef's Avatar
    Join Date
    Jul 2007
    Location
    Delft, The Netherlands
    Posts
    746
    Version
    IrfanView 4.44
    OS
    64-bit Win 10
    CPU Cores
    4

    Default NEF versus JPG

    All repliers are talking of conversion from NEF to JPG. But I don't read anything about the quality that is to expect. NEF is a compressed file and when you look at a NEF-picture in IrfanView at 100%, you'll see the compression-artefacts. First the NEF (RAW) file must be uncompressed, whitch is Possible with the Photoshop plugin Camera Raw, Lightroom, Capture NX, ACDSeePro2, etc. IrfanView doesn't do anything with this artefacts. After conversion to JPG you'll get what you saw on screen in the viewer. That's the reason I only view my NEF files with IrfanView and don't convert or edit them with IrfanView.

    On the other hand, shooting RAW is rather demanding about the time you have to spend converting/editing afterwards. Also the color profile is very important. In many cameras you can set Adobe RGB and sRGB. Any viewer can handle sRGB, but not any viewer can cope with Adobe RGB. So to keep things universal, you'll have to put the sRGB colorspace into your converted NEF-picture, before you save this to JPG. IrfanView recognizes a different colorspace (different from sRGB) when the 'Use embedded color profiles for JPG/TIF (plugin)' is set in Settings»Viewing. With one disadvantage: it's slow.

    I often take a hundred fotos in one session and it's a crime to edit them all in Photoshop or ACDsee. The only difference I experience between JPG and NEF (after editing) is a very small halo-effect around dark edges in front of light backgrounds. That is, exclusively and only to perceive
    in the 100% modus. So for edit time sake I only shoot a NEF foto when I want to print it at very large proportion, which almost never is the case.

    See also the photo in the attachment.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	fotokopie.jpg 
Views:	200 
Size:	398.2 KB 
ID:	1375  
    Last edited by Sjef; 14.04.2009 at 03:51 PM. Reason: Photo (attachment)

  4. #14
    IV Newbie
    Join Date
    Apr 2009
    Posts
    7
    Version
    IrfanView 4.23
    OS
    32-bit Win 2000
    CPU Cores
    1

    Default

    No, all repliers are not talking about NEF->JPG conversion. In fact, I originated this thread unter the title "Exif Stripped (.TIF->.JPG)". Meanwhile, FlyingMG started a different thread under the current title "Exif Info lost after conversion NEF -> JPG". Somehow the two threads became one. Perhaps a moderator, seeing the similarity, amalgamated them.

    Be that as it may, I'm really not very interested in re-fighting the wars about shooting RAW vs. JPG. My point is very simple. In IV, if you convert from anything(?) to JPG, you are given an option to retain the EXIF data. That option does not work, at least on my system, and apparently on other's.

  5. #15
    Moderator Sjef's Avatar
    Join Date
    Jul 2007
    Location
    Delft, The Netherlands
    Posts
    746
    Version
    IrfanView 4.44
    OS
    64-bit Win 10
    CPU Cores
    4

    Default

    Hi daveg,
    If you still hold on to 'convert' RAW to JPG you have a point. IrfanView doesn't retain the EXIF data. Maybe because there's too much loss of really important data anyway. Maybe mister Skiljan didn't find it realistic to maintain the EXIF data, seen from this point of view.
    Another way to handle your RAW files is to import them in RAW Therapee. A free program that converts this format to JPG the way it should. Download from http://www.rawtherapee.com/?mitem=3

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •