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frax_
frax_
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Euclidean allocation in Photoshop

Oct 5, 2011 2:36 AM

Tags: #effect #maps #gis #arcgis #euclidean #euclideanallication #contentawarefill #map

Hi,

 

I am not super-frequent Photoshop user (CS5), so maybe this functionality already exists, and I just not aware of that. I am a frequent user of the GIS (mapping) software suite called ArcGIS though - and there I have a handy tool that is called 'Euclidean Allocation' that one can apply on images. It only supports one-channel images though. This page describes the functionality...

 

I am interested in hearing if there is an easy way to do this in Photoshop... One way to do something similar is using 'content-aware fill' but it is not exactly the same...

 

Here is an image where I have demonstrated the euclidean allocation functionality in ArcGIS:

eucalloc.png

The top is the original image, and the lower one is where I have applied this functionality. This way I can "grow" and "expand" the colors into the white (no data, transparent)

1046 Views   12 Replies   Latest reply: frax_, Oct 20, 2011 12:35 AM
 
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  • acresofgreen
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    1. acresofgreen,
    Oct 5, 2011 2:50 AM   in reply to frax_
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    There is no link to the page describing the functionality.  Not knowing anything about GIS, it is hard to understand what you want to do with Photoshop.

     
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  • frax_
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    2. frax_,
    Oct 5, 2011 3:13 AM   in reply to acresofgreen
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    Oups - the link fell off. I hoped that the image + my attempt at explanation would help though...

     

    Here is the link:

    http://bit.ly/mYHw6K

     
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  • acresofgreen
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    3. acresofgreen,
    Oct 5, 2011 3:45 AM   in reply to frax_
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    I don't think there is a built-in functionality in Photoshop that would do any such calculations out of the box. You may be able to do something with scripts, though.  Maybe some of the developer pros here will have some ideas for you.

     
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  • Mylenium
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    4. Mylenium,
    Oct 5, 2011 7:41 AM   in reply to frax_
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    There's a ton of Voronoi filters out there based on pseudo-random distribution, but I'm not aware of an analytic Euclidian filter that could use real data either for PS or any other Adobe program...

     

    Mylenium

     
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  • Noel Carboni
    21,324 posts
    Dec 23, 2006
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    5. Noel Carboni,
    Oct 5, 2011 9:37 AM   in reply to frax_
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    Out of curiosity, what's the goal?  Are you trying to show what waters individual countries control? 

     

    There's no math that will model politics.  Asimov's psychohistory hasn't been invented yet.

     

    -Noel

     
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  • Mylenium
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    6. Mylenium,
    Oct 5, 2011 9:54 AM   in reply to Noel Carboni
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    In GIS it's usually used to determine pollution and what influence neighboring different types of area use have (usually in combination with other algoritms/ methods and run in multiple iterations) as well as determining safety perimeters as required for e.g. industrial buildings.... This may merely be a random example.

     

    Mylenium

     
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  • frax_
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    7. frax_,
    Oct 5, 2011 12:36 PM   in reply to Mylenium
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    Mylenium - I am not interested in using real data, only the colors

     

    Noel - I am a cartographer, and sometimes a thematic dataset (covering a land area) doesn't match my coastlines. To make the maps really pretty, I can use this functionality to "grow" the thematic dataset out into the ocean, and then I use the coastlines as a mask to not show the values in the ocean.

     

    Please don't get to hung up on usage of data or GIS - I just want to "grow" the colors (without any mixing/aliasing) straight out into transparent pixels (or a selection) - a bit similar to 'content-aware fill' but in a way more simplistic...    

     
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  • frax_
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    8. frax_,
    Oct 5, 2011 12:44 PM   in reply to frax_
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    Think of it this way - for any transparent pixel, I would want it to to be filled with the color from the closest non-transparent pixel.

     
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  • Noel Carboni
    21,324 posts
    Dec 23, 2006
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    9. Noel Carboni,
    Oct 5, 2011 1:01 PM   in reply to frax_
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    That makes sense; thanks for the explanation.

     

    Sounds like the kind of thing that one would need a relatively simple filter plug-in to do.  Probably wouldn't even need much of a user interface.

     

    -Noel

     
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  • frax_
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    10. frax_,
    Oct 19, 2011 2:32 AM   in reply to Noel Carboni
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    so I have found a solution! It is a quite simple Photoshop Action - you can read more about it here

     
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  • ssprengel
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    11. ssprengel,
    Oct 19, 2011 5:53 AM   in reply to frax_
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    There is no URL behind your "here" anchor.

     
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  • frax_
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    12. frax_,
    Oct 20, 2011 12:35 AM   in reply to ssprengel
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    Sorry about that - here is the link...

     
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