Setting DPI/Resolution Help

Discussion in 'Photoshop Tutorials' started by K. Daver, Oct 27, 2004.

  1. K. Daver

    K. Daver Guest

    I (with the help of the group) managed to get the photo that I wanted to
    print, properly set at 8x10. I just spoke with the printer and they
    said that they request the photo to be at 300 dpi, which I thought I
    used. I think it might be at 240 dpi, however.

    I just tried making a new file, and set it at 8x10x300dpi. When I
    dragged the original untouched photo to the new "frame", it was smaller
    than usual. I tried printing the photo (both cropped and uncropped) and
    it looks like it's printing the photo on a sheet with a good inch above
    and below the photo.

    What did I do wrong? Since the resolution is set at 8x10, I don't see
    why it was a smaller image. Is there any way to get it at 300dpi but
    still print as a true 8x10 (which it did at 240dpi).

    Thanks again!!
     
    K. Daver, Oct 27, 2004
    #1
    1. Advertisements

  2. K. Daver

    Gadgets Guest

    Open your 240dpi image and use 'image size' with resample turned on and set
    300dpi - this will throw in another 60 guesstimated dots per inch. A slight
    sharpen and this might be a little better than just the 240dpi original.

    10in @ 240dpi = 2400 pixels
    at 300dpi, 2400 pixels becomes 8in

    Cheers, Jason (remove ... to reply)
    Video & Gaming: http://gadgetaus.com
     
    Gadgets, Oct 27, 2004
    #2
    1. Advertisements

  3. K. Daver

    K. Daver Guest

    Great... Thanks for the quick reply!
     
    K. Daver, Oct 27, 2004
    #3
  4. K. Daver

    Tacit Guest

    I just tried making a new file, and set it at 8x10x300dpi. When I
    Corrct. Of course it was.

    Think about this for a minute: A picture in Photoshop is nothing but a grid of
    little tiny squares. Each square is a pixel.

    A picture that is 8 by 10 at 240 pixels per inch is 1,920 pixels wide and 2,400
    pixels deep. A picture that is 8 by 10 at 300 pixels per inch is 2,400 pixels
    wide and 3,000 pixels deep.

    You have a grid of little tiny squares. It is 1,920 pixels wide and 2,400
    pixels deep. You drag it into another grid of little tiny squares that is 2,400
    pixels wide and 3,000 pixels deep. It will not fill that second grid of
    squares. There will be 240 pixels of empty space on the top and 240 pixels of
    empty space on the bottom, and 300 pixels of empty space on the left and 300
    pixels of empty space on the right.

    A pixel is just a square of color. Think of a picture as a tile mosaic. Each
    tile is one pixel.
     
    Tacit, Oct 27, 2004
    #4
  5. K. Daver

    Tacit Guest

    Open your 240dpi image and use 'image size' with resample turned on and set
    Interpolating an image will never make it better. Ever. No technique, no
    program, no algorithm can increase the number of pixels in an image and produce
    information that was not in the original.

    A picture that is created at too low a resolution is doomed; taking an image
    and increasing its resolution through interpolation does not increase its
    quality.

    The best way to solve the problem of an image with too low a resolution is to
    throw it away and begin again. If you can't do that, then you have to accept
    that the image resolution is lower than ideal, and you can't really improve its
    quality.
     
    Tacit, Oct 27, 2004
    #5
  6. K. Daver

    jjs Guest

    No it won't be better. Not a bit.
     
    jjs, Oct 27, 2004
    #6
  7. K. Daver

    Aerticus Guest

    Create a crop option?

    Open an image - any image then:
    1 - click the crop tool

    2 - enter 10 in (yes the in is important too especially if you do not want
    10cm) in one box

    3 - enter 8 in in another box (that is not a typo - brare I know but the in
    and in mean two different things)

    4 - enter 300 in the other box

    5 - click the tick

    6 - not finished yet - click the teeny-weeny itsy-bitsy triangle (find it
    once and you'll never overlook it ever again) and creat a new crop tool
    option

    7 - hey! PSCS has beaten you to it! The tool has a name crop 10 by 8 in 1

    8 - guh-roovy or wot!

    Aerticus
     
    Aerticus, Oct 27, 2004
    #7
  8. K. Daver

    Aerticus Guest

    PS - due acknowledgements to
    Aerticus

     
    Aerticus, Oct 27, 2004
    #8
  9. K. Daver

    Odysseus Guest

    I agree entirely, but IME 240 ppi is just fine for most images when
    reproduced by most common methods (e.g. inkjet print, 150-lpi offset
    printing). If someone were to insist he needs such an image at 300 ppi,
    sure, I'd upsample it -- not because I'd expect it to improve anything,
    but just to make him happy.
     
    Odysseus, Oct 27, 2004
    #9
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.