Autochrome and Help for RGB Photoshop Solution

Discussion in 'Alternative Processes' started by Mustafa Umut Sarac, Dec 12, 2011.

  1. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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    Noones have money to buy the dyes for Autochrome. My only hope is photoshop. I attached a RGB Graph of 1907 Research from Wratten Company.
    I want to manuplate a picture with it. Please someone step by step explain that how it is being done .

    Thank you ,

    Umut
     

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  2. Molli

    Molli Subscriber

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    Would the guys and girls over at DPUG be able to help you out with this? I checked there myself but most everything to do with Autochrome was a thread started by you :smile:
    I'm not sure exactly what you're after so I'm useless to you, but there was mention of creating colour separation digital negatives... sorry, I want to help because I've seen around how much you want to get this to work, but I'm out of my depth here.
    Holmburger's thread about experimenting with RGB colour screens has a comment from htmlguru4242 mentioning that he was working on RGB inks for Epson printers... would that help you at all with what you're wanting to achieve? That particular post is here if it's of assistance: http://www.apug.org/forums/viewpost.php?p=1031588

    Sorry not to be of any help :sad:

    Edit: Is this more in line with what you're after? The gentleman who wrote the article is using ICC profiles to restrict the colour gamut to the more muted orange, green and violet palette of old Autochromes. The article is here: http://therefractedlight.blogspot.com/2011/10/autochrome.html.
    At the end of the article is a link to an update with how he created the profile.
    Sorry if I'm way off the mark here. I probably shouldn't have responded since I have nothing intelligent to add, but I do so hate to see unanswered requests for help!
     
    Last edited by a moderator: Dec 12, 2011
  3. holmburgers

    holmburgers Member

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    Umut I think you must find another place to ask this question... surely someone would have answered by now if they knew. You have tapped the resources of APUG, though you could try DPUG (I wouldn't hold out a lot of hope though).

    You need to take your picture, separate it into RGB and then apply these spectral curves to each layer and then overlay them. Of course, I have no idea how to do that in practice. But so many other things will stand in the way of capturing the autochrome look; like the original spectral sensitivity of the film, the reseau pattern and so forth.

    Screen-plates are unique in that the same filters are used for separating the color sensation and recombining them; which is unique in color photography. There has to be a compromise in this instance. Taking any other kind of picture and then applying the colors from Autochrome won't necessarily equal the look, because the separations were made at different/unknown wavelengths.
     
  4. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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    No , The process must to be separete the RGB channels with presented 1907 RGB curves.
    How softwares separete the color image in to RGB channels , how RGB Channels presented to the software , where can I find the algorithms is a way to make my small photoshop plug in. I think I might have some digital vision books and I can read them free. But I am open to all information.

    I am open to all advises.

    Molli , thank you , I will replay whats been done at the blog.

    And I dont like to be advised not to ask that , not to write this.

    Umut
     
  5. holmburgers

    holmburgers Member

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    I only meant that I think (my opinion is) that you would be better off asking this somewhere different. You and I both know that unless someone new shows up that has never posted on APUG before, there is probably no one that will come forth with instructions for you.
     
  6. ann

    ann Subscriber

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    google Harris technique and see if this might be helpful
     
  7. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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    Thank you Chris and Ann. I will google it now.
     
  8. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

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    I registered to Creative Cow Forum and asked the questions. Question will arise all photoshop forums and digital darkroom forums plus code writing forums. ? will try to dig GIMP source code also.

    Umut
     
  9. MDR

    MDR Member

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    Mustafa have you tried the alternativephotography.com site, they have a tutorial on three color gum and creating separation negs via photoshop and I also believe that they have curves for photoshop as well as Gimp

    Good Luck

    Dominik
     
  10. jnanian

    jnanian Advertiser Advertiser

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    great advice !

    the folks doing separation negatives in PS for alt work
    would know exactly how to do this sort of thing.

    good luck !
    john