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  1. #1
    Mustafa Umut Sarac's Avatar
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    Autochrome and Perlin Noise



    If you download and enlarge this image , you could see the starch grains.

    A lots of people uses gaussian noise of the photoshop for to create a look like grainy autochrome but I think true color noise can be adapted by Perlin Noise.

    Perlin Noise is what you see at shoot kill multi player games walls , ground everywhere. Realistic noise

    It is used for all games and renderings and Perlin got academy award.

    I dont know how you will use this information but it is very very important.

    May be ALT printers will prepare their negatives by this way.

    Or you can write a plug in to mimic the look of autochrome.

    ALT people will enjoy and the digital ALT inkjet people also

    Best ,

    Mustafa Umut Sarac

    Istanbul
    Last edited by Mustafa Umut Sarac; 06-16-2010 at 07:13 PM. Click to view previous post history.

  2. #2
    Mustafa Umut Sarac's Avatar
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    Thank you Charles for the image.

    Umut

  3. #3
    holmburgers's Avatar
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    very interesting sir!

  4. #4
    Mustafa Umut Sarac's Avatar
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    If you want to print transparent filter look alike autochrome , stohastic distribution of noise will be rewarded also. But there is no such huge information at wiki and the wiki examples are not open to got the idea.
    Game developer forum sites sometimes put examples.
    I read dust , mud are used to make generation architecture look more realistic. I am remembering Tarkovsky , Stalker Bar and bedroom scenes and perlin noise creates this without artistic genius need.
    Starch noise is so similar to this.

  5. #5
    Mustafa Umut Sarac's Avatar
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    http://www.noisemachine.com/talk1/index.html

    Ken Perlin explains noise , I found that 3D modelling softwares gives a selection of textures to render on your object. May be not photoshop but MAYA or others would help to implement this.
    Modelling softwares tutorials and forums are so rich and you can code everything.
    May be you can find a algorithm and voila.
    Well We are going in to 3D photography and new softwares will be definetely put this on the table.
    I think APUG will switch to hologram printing from stereo pictures.
    Well future will be very interesting really.

  6. #6

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    Quote Originally Posted by Mustafa Umut Sarac View Post
    I think APUG will switch to hologram printing from stereo pictures.
    You've have to go to the hybrid photo site to discuss that... ;^)
    Kirk

    For up from the ashes, up from the ashes, grow the roses of success!

  7. #7
    holmburgers's Avatar
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    How could one make a screen-plate with a random RGB pattern (such as Perlin noise) that would mimic the irregular screen methods (like autochromes)? I personally have no idea and no software capable of doing such, but what would it take? I know that some examples are mentioned above, but I'm just re-asking the question to see if something can be done in practice.

    Surely there's some CPU wiz that could pop out a screen in no time, right?!
    If you are the big tree, we are the small axe

  8. #8
    Photo Engineer's Avatar
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    Just like the printing method described in the other thread, but use a random number generator for the color. And, make the "dots" somewhat larger. On the Autochromes that I have compared with Dufaycolor, it seems that the Autochrome "dots" are larger but less noticeable than the regular Dufay "dots". OTOH, at least the Autochromes that I scanned look awful.

    A large (4x5 or 5x7) Autochrome or Dufay plate looks better than a 2x3 plate at a normal viewing distance.

    PE

  9. #9
    holmburgers's Avatar
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    Any ideas what programs are capable?
    If you are the big tree, we are the small axe

  10. #10
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    Quote Originally Posted by holmburgers View Post
    Any ideas what programs are capable?
    I've mentioned before that Visual BASIC has this capability as does C++, both from Microsoft. VB is easier to program. I believe it is a free download from Microsoft now.

    As for the program, you would draw a dot sequence on a "form" using the color and point commands and then you could print the form to the printer using transparency materials.

    I have done this many times, and have seen the Dufay resau printed, but have not written such a program. I have written graphing programs though that do much the same.

    PE

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