Determining percentage of selected area?

Discussion in 'Mac Basics and Help' started by jent, Aug 27, 2012.

  1. jent macrumors 6502a

    jent

    Joined:
    Mar 31, 2010
    #1
    I have a map of a country which includes the dividing wall between the two parties to a territorial dispute. I was wondering if I can use an image editor to somehow select the territory itself, and then select the corresponding areas of control for each side, and then get a breakdown of what percentage each side controls. Does anyone have an idea of how to do this?
     
  2. chown33 macrumors 604

    Joined:
    Aug 9, 2009
    #2
    Color one side solid red. Color the other side solid blue. Show histogram. The numbers of red and blue should match the pixel-counts of each, since that's what a histogram is.

    Could also use a gray-scale image, color one side solid gray, the other side solid white, and do a histogram on that.
     

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