Determining percentage of selected area?

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

  1. jent macrumors 6502a


    Mar 31, 2010
    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

    Aug 9, 2009
    Sailing beyond the sunset
    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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