reduce 16 bits to 8 bits

Discussion in 'Photoshop' started by pshaw, Jun 7, 2009.

  1. pshaw

    pshaw Guest

    for some reason one of my 16 bit tif pix cannot be reduced to 8 bits!
    the 8 bit option is greyed out. i tried converting it to a psd but the
    8 bit option was still greyed out. any suggestions how to get the 8
    bit option back?

    tia

    steve
     
    pshaw, Jun 7, 2009
    #1
    1. Advertisements

  2. pshaw

    Joel Guest

    I don't know what you are looking at, but if you want 8-bit then just save
    to JPG then you have no other option but 8-bit
     
    Joel, Jun 7, 2009
    #2
    1. Advertisements

  3. pshaw

    pshaw Guest

    unfortunately saving to 8 bits is not an option for any file that is
    16 bits in photoshop cs4

    steve
     
    pshaw, Jun 7, 2009
    #3
  4. pshaw

    pshaw Guest

    fabulous idea ... but ..."not enough scratch memory" ... and i have a
    scratch memory only 160 gig hard drive! the image is only 350 megs or
    so ... strange ...

    but nice idea :) ...

    steve
     
    pshaw, Jun 8, 2009
    #4
  5. pshaw

    pshaw Guest

    yep ... one can see the /16 in the top of the image

    steve
     
    pshaw, Jun 8, 2009
    #5
  6. pshaw

    pshaw Guest

    according cs4 it is in rgb mode ...i can send a screen shot
    documenting this ...

    steve
     
    pshaw, Jun 10, 2009
    #6
  7. pshaw

    pshaw Guest

    shangara was kind enough to post a work around ...i created an 8 bit
    blank image of the same dimensions ...copied the 16 bit into it, ok'ed
    the conversion to 8 bits and it was a done deal ...

    but ...i still wonder why the conversion of the original image was
    greyed out ...oh well ...

    steve
     
    pshaw, Jun 10, 2009
    #7
  8. pshaw

    Rob Guest

    If that worked then try a "save as" of your tiff file close and reopen
    it and see what happens.

    In the past I have had problems with tiff files that were not correctly
    recognised in PShop 7.0? They were scanned slide images from the Nikon
    film scanner.
     
    Rob, Jun 10, 2009
    #8
  9. pshaw

    pshaw Guest

    the problem with that image is that it is about 400 megs :) ... and
    .... as it is 16 bits i can't reduce it to a jpg :) ...

    but shangara's suggestion to copy it to a same size 8 bit image worked
    .... strange ...

    steve
     
    pshaw, Jun 11, 2009
    #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.