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idb52345
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how do I convert a scanned color negative into a positive on photoshop?

Jun 21, 2013 2:21 PM

Tags: #color #raw #mac #photoshop_cs6

I have just scanned a color negative into photoshop and lo and behold it comes up on screen as a color negative.  How do i now convert it to a positive so that I can work with it.?

 
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  • Currently Being Moderated
    Jun 21, 2013 2:40 PM   in reply to idb52345

    I have not tried this command on a negative,but it's Ctrl i (PC) or Cmd i (Mac) for Invert Colors.

     
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  • Trevor Dennis
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    May 24, 2010
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    Jun 21, 2013 3:10 PM   in reply to idb52345
     
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  • Currently Being Moderated
    Jun 21, 2013 3:11 PM   in reply to idb52345

    The Invert command will typically not do the job on its own for a color negative. This is because color negatives have an amber mask that will become a blue color cast after inverting, so the inverted color negative will not have the proper colors.

     

    The best place to convert a color negative is usually at scan time with the scanning software. Many scanning applications have a good color negative conversion feature built in, and some have profiles for specific types of color film to remove the amber mask more effectively. This is the preferred method because the image comes into Photoshop positive and ready to use.

     

    If your color negative is already in Photoshop, you can invert it as a first step, and then use a Curves adjustment layer to eliminate the mask color using a curve in each channel. You can find various tutorials for this around the web. But it takes a lot more time than getting it right at the scanner.

     
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  • Trevor Dennis
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    May 24, 2010
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    Jun 21, 2013 3:17 PM   in reply to idb52345

    I was not being funny.  The Google search I linked to had countless links that directly answered your question. 

     
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  • Currently Being Moderated
    Jun 21, 2013 4:28 PM   in reply to Trevor Dennis

    Trevor: For some oddball reason,your Google link defaults to the Google New Zealand home page from here in the US.

     

    Using "google.com" in the address works here. (Sorry,my html skills are sub par)

     

    https://www.google.com/#output=search&sclient=psy-ab&q=photoshop+scann ed+color+negatives&oq=photoshop+scanned+color+negatives&gs_l=hp.3..0i2 2i30.5801.18053.0.18214.33.25.0.8.8.0.1005.8112.2-21j2j1j7-1.25.0...0. 0...1c.1.17.psy-ab.PXHmyu7r0iU&pbx=1&fp=1&biw=1920&bih=1047&bav=on.2,o r.r_cp.r_qf.&cad=b

     

    Try it now, idb52345  Trevor is a well known expert in these forums and would never intentionally give you the Google main search page.

     

    Gene

     
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  • Trevor Dennis
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    May 24, 2010
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    Jun 21, 2013 4:38 PM   in reply to gener7

    Gene, that's interesting to know.  We know that Google is clever enough to use local information, but I'd have thought that the search parameters I used would span all continents. 

     
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  • Currently Being Moderated
    Jun 21, 2013 4:55 PM   in reply to Trevor Dennis

    So would I, Dennis. I wonder what the Google.com link shows up as in New Zealand?

     

    Gene

     
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  • Trevor Dennis
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    May 24, 2010
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    Jun 21, 2013 5:42 PM   in reply to gener7

    gener7 wrote:

     

    So would I, Dennis. I wonder what the Google.com link shows up as in New Zealand?

     

    Gene

     

    It brings up exactly the same links as the Google.co.nz one I posted back up the thread.  I can open both in seperat tabs, and toggle between them and they are entirely identical.   That's not to say that you would see the same thing as me.

     

    Google.jpg

     
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  • Currently Being Moderated
    Jun 21, 2013 8:50 PM   in reply to Trevor Dennis

    Trevor's link works fine for me in the US.  From the very early Photoshop it was advised to use color cast removal after inversion.

     
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  • Trevor Dennis
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    May 24, 2010
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    Jun 21, 2013 9:34 PM   in reply to Lundberg02

    Here's one to practice with

     

    http://www.photosolve.com/main/resources/pw_film_conv/images/neg.jpg

     

    Load, and copy BG layer

    Invert

    Copy inverted layer

    Filter > blur > Average

    Invert the averaged layer

    Change its blend mode to Color, and drop its opacity to suite.

     

    It ends up undersaturated, so you need to add a Hue/Sat or Vibrance layer

     

     

    Actually there is a sort of double negaive thing going on there, but I tried doing it in less stepps and failed.

     
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