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How do I find the coordinates of points in this image?


I have never used image processing with Mathematica. I need to get the coordinates of the red points from this image I made in Illustrator. Is there a way to get Mathematica to read or detect the x-y coordinates?


enter image description here



Answer



A solution for Mathematica version 9:


image = Import["http://i.stack.imgur.com/R0Dqo.png"]
pts = PixelValuePositions[image, Red, .2];
ListPlot[pts, 

 PlotStyle -> Darker@Orange, 
 PlotMarkers -> {Automatic, .05}, 
 PlotRange -> {{0, 1500}, {0, 800}}, 
 ImageSize -> 600]

listplot of points


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