help with rotation issue

Discussion in 'Digital Photography' started by laj, Sep 12, 2005.

  1. laj

    laj Guest

    Hi,
    when I import my dig picts from canon rebel dig via cf reader the
    portraits are automatically turned upright in photoshop and bridge.
    But they remain sideways in explorer and thus also in the photo slide
    program i send them too.

    Whats the best way to automate a whole folder to turn 90deg? I trided
    an action in photoshop cs2 but it keeps stopping at the jpeg
    compression 'ok' step for each.

    Thanks,
    Jack
    laj, Sep 12, 2005
    #1
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  2. laj

    BD Guest

    I'd use ACDSEE (select a group of files and select Tools / JPEG
    Rotate)...

    But I'm sure that th Photoshop you could create an Action and apply it
    to the whole folder.

    I don't use Irfanview personally, but I would expect it would have the
    same functionality, and it's free.
    BD, Sep 12, 2005
    #2
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  3. You don't want to do this! If you rotate them all you will resave as a JPG
    and that degrades them...then if you edit them they degrade again.

    The reason that Photoshop and bridge show them rotated is that they just
    remember that you want them rotated...they don't actually do it.

    I have heard that some programs can rotate without loss...don't know which
    ones.

    In bridge you can select all that you want rotated and mark them and
    rotate...Photoshop will load them rotated.

    --
    Thanks,
    Gene Palmiter
    (visit my photo gallery at http://palmiter.dotphoto.com)
    freebridge design group
    www.route611.com & Route 611 Magazine
    "laj" <> wrote in message
    news:...
    > Hi,
    > when I import my dig picts from canon rebel dig via cf reader the
    > portraits are automatically turned upright in photoshop and bridge.
    > But they remain sideways in explorer and thus also in the photo slide
    > program i send them too.
    >
    > Whats the best way to automate a whole folder to turn 90deg? I trided
    > an action in photoshop cs2 but it keeps stopping at the jpeg
    > compression 'ok' step for each.
    >
    > Thanks,
    > Jack
    Gene Palmiter, Sep 12, 2005
    #3
  4. laj

    BD Guest

    Interesting; I wasn't aware that ACDSee rotate was lossy; I thought it
    just remapped each pixel in the image to the new orientation.
    BD, Sep 12, 2005
    #4
  5. laj

    Frank ess Guest

    Gene Palmiter wrote:
    > You don't want to do this! If you rotate them all you will resave as
    > a JPG and that degrades them...then if you edit them they degrade
    > again.
    > The reason that Photoshop and bridge show them rotated is that they
    > just remember that you want them rotated...they don't actually do
    > it.
    >
    > I have heard that some programs can rotate without loss...don't know
    > which ones.
    >
    > In bridge you can select all that you want rotated and mark them and
    > rotate...Photoshop will load them rotated.
    >


    Look under "Options" in Irfanview.



    >> Hi,
    >> when I import my dig picts from canon rebel dig via cf reader the
    >> portraits are automatically turned upright in photoshop and bridge.
    >> But they remain sideways in explorer and thus also in the photo
    >> slide
    >> program i send them too.
    >>
    >> Whats the best way to automate a whole folder to turn 90deg? I
    >> trided
    >> an action in photoshop cs2 but it keeps stopping at the jpeg
    >> compression 'ok' step for each.
    >>
    >> Thanks,
    >> Jack
    Frank ess, Sep 12, 2005
    #5
  6. laj

    laj Guest

    thanks, i read somewhere here that canons zoombrowser that came with
    my camera does this losslessly. Since I already had it installed i
    tried it and it seems to work fine. Not sure is degraded? grossly
    looks ok.
    laj, Sep 13, 2005
    #6
  7. "BD" <> writes:
    >Interesting; I wasn't aware that ACDSee rotate was lossy; I thought it
    >just remapped each pixel in the image to the new orientation.


    With something like a TIF image file, reading and rotating it in an
    ordinary image editor (and ACDSee is probably the same) is lossless.
    But JPEG images are lossily compressed, and the image file doesn't
    contain individual pixels, just coefficients that can be used to
    reconstruct an approximation to the original image. Rotating a JPEG
    image with a normal editor means decompressing it into a bitmap,
    rotating the bitmap, and then lossily compressing it again. This loses
    some information.

    To avoid this, there are specialized JPEG rotation functions in some
    programs (like Irfanview). These work by rotating the compressed
    coefficients, without ever decompressing or recompressing. Thus, there
    is no (additional) loss.

    Dave
    Dave Martindale, Sep 13, 2005
    #7
  8. David J Taylor, Sep 13, 2005
    #8
  9. Keith Sheppard, Sep 14, 2005
    #9
  10. laj

    Chris Guest

    With XP you can select all, right click on them and choose rotate CW
    or CCW.

    On Mon, 12 Sep 2005 10:15:27 -0700, laj <> wrote:

    >Hi,
    >when I import my dig picts from canon rebel dig via cf reader the
    >portraits are automatically turned upright in photoshop and bridge.
    >But they remain sideways in explorer and thus also in the photo slide
    >program i send them too.
    >
    >Whats the best way to automate a whole folder to turn 90deg? I trided
    >an action in photoshop cs2 but it keeps stopping at the jpeg
    >compression 'ok' step for each.
    >
    >Thanks,
    >Jack
    Chris, Sep 16, 2005
    #10
  11. laj

    Jukka Aho Guest

    laj wrote:

    > when I import my dig picts from canon rebel dig via cf reader the
    > portraits are automatically turned upright in photoshop and bridge.
    > But they remain sideways in explorer and thus also in the photo slide
    > program i send them too.
    >
    > Whats the best way to automate a whole folder to turn 90deg?


    You might want to try XnView. It's a free image viewer (actually, pretty
    much an ACDSee clone) with rudimentary image processing functions -
    including lossless JPEG rotation based on EXIF "Orientation" field and
    an IPTC editor. (Yes, it also rotates the EXIF thumbnails and corrects
    the EXIF "Width" and "Height" fields.)

    XnView can be downloaded here:

    <http://www.xnview.com/>

    See <http://www.saunalahti.fi/znark/xnview.png> for a screenshot.

    XnView will display images automatically in their correct orientation,
    but images which are rotated this way (on the fly) have a small arrow
    symbol on them, indicating that the actual image data in the file has
    not (yet) been rotated.

    In order to rotate a whole directory full of pictures automatically,
    select all images (Ctrl+A), click on the "JPEG Lossless Transformations"
    toolbar button, and then click the "EXIF" button on the dialog that will
    pop up. (You might also want to make sure that the option "Reset EXIF
    orientation value" is checked in the same dialog.) Once you have done
    this, all images have lost their little arrow symbols, and will now
    display correctly in Windows Explorer, too.

    A helpful tip: you might want to change the thumbnail area width and
    height to (exactly) 160 pixels in the settings, since EXIF thumbnails
    (produced by the camera, embedded into the image file) are usually
    stored in a 160×120 pixel format. This way XnView will display the
    embedded EXIF thumbnails in their native resolution, without scaling.

    --
    znark
    Jukka Aho, Sep 16, 2005
    #11
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