converting negatives to positives

Discussion in 'Photoshop' started by jeroen, Jan 3, 2004.

  1. jeroen

    jeroen Guest

    Question,

    I have a lot of negatives, i use my digital camera to take a photograph of
    these (in macro mode). When using the standard functionality of photoshop to
    invert them to positive i get a picture, but it is way too blue. Does
    anybody know of a plugin for photoshop that can convert negatives in a
    better way ?

    Regards and thanks in advance,
    Jeroen
    jeroen, Jan 3, 2004
    #1
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  2. jeroen

    Mike Russell Guest

    jeroen wrote:
    > Question,
    >
    > I have a lot of negatives, i use my digital camera to take a
    > photograph of these (in macro mode). When using the standard
    > functionality of photoshop to invert them to positive i get a
    > picture, but it is way too blue. Does anybody know of a plugin for
    > photoshop that can convert negatives in a better way ?


    It can be done with curves in Photoshop. The idea is to make the orange
    mask black and the darkest possible part of the negative whtie.

    Here are some sample curves, and a procedure for making your own:
    http://www.zocalo.net/~mgr/DigitalPhoto/derCurveMeister/
    --

    Mike Russell
    www.curvemeister.com
    www.geigy.2y.net
    Mike Russell, Jan 3, 2004
    #2
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  3. jeroen

    hedge Guest


    > >
    > > I have a lot of negatives, i use my digital camera to take a
    > > photograph of these (in macro mode). When using the standard
    > > functionality of photoshop to invert them to positive i get a
    > > picture, but it is way too blue. Does anybody know of a plugin for
    > > photoshop that can convert negatives in a better way ?


    Take a photograph of the negative, and also take a shot with a a bit of the
    internegative blank part (any clear orange bit, maybe some on the leader
    part you can shoot). Cut out the blank bit and resize it to the same size as
    your negative. Paste it into a 2nd layer above your negative shot , and
    invert it.. Then add the layers. That will cancel out exactly the orange
    layer no matter what make of film and individual variations in base
    material. Now you should have a 'negative ' without the orange, so invert
    that and you should then only need to set levels or curves or whatever you
    use.
    hedge, Jan 3, 2004
    #3
  4. jeroen

    hedge Guest

    > > I have a lot of negatives, i use my digital camera to take a
    > > photograph of these (in macro mode). When using the standard
    > > functionality of photoshop to invert them to positive i get a
    > > picture, but it is way too blue. Does anybody know of a plugin for
    > > photoshop that can convert negatives in a better way ?

    >

    Another trick I have done was when I wanted to make contact sheets , ie
    positive copies of negs like as thumbnails, I placed them onto a flatbed
    scanner, scanned and saved the image ( of all in one go) , then I ran them
    through Vuescan (www.hamrick.com) treating the first pass as a negative to
    positive conversion, saving the result. A second pass as an 'image' was used
    to 'set levels', and a very commendable result was obtained.
    I see no reason why you can't photograph the negs individually and save them
    in a numerical sequence (vuescan can handle that better ie 1, 2, 3, etc)
    Then run vuescan pointed at the folder where you saved them setting the file
    type to negative image and run them thru saving the result to a second
    folder. Run the second folder thru Vuescan with the image type set to image
    , and the other function set to 'white level' and you should have them all
    done. A little touching up in photoshop if required.
    hedge, Jan 3, 2004
    #4
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