MATLAB: Counting Australian coins in matlab

coinscountingImage Processing Toolbox

Hi, I need to write a function that calculates how many coins are in a picture and determines there combined value, I have the following code that works for a stock image, but I cant seem to apply it to work with an image containing Australian coins, such as this:
Here is the current code I have:
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coin1 = im2bw(imread('coins.png'));
coin2 = imfill(coin1,'holes');
[L Ne]=bwlabel(double(coin2));
prop=regionprops(L,'Area','Centroid');
total=0;
imshow(imread('coins.png'));hold on
for n=1:size(prop,1)
  doll=prop(n).Centroid;
  X=doll(1);Y=doll(2);
  if prop(n).Area>2000
      text(X-10,Y,'$1') 
      total=total+1;
  else
      total=total+2;
      text(X-10,Y,'$2') 
  end
end
number = n
dollar = total
hold on
title(['Dollars: $',num2str(dollar),'  ', 'Number of coins:',num2str(n)])
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Any help would be appreciated, thanks

Best Answer

See my demo where I do the same thing with the US coins supplied in the standard MATLAB demo image: http://www.mathworks.com/matlabcentral/fileexchange/25157-image-segmentation-tutorial-blobsdemo I find 5 cent and ten cent coins. Of course from that point it's a simple matter to add up the value of the coins.
Just a quick glance looks like your code should work as long as there are only two type of coins and those with area more than 2000 all have the same value and those with area less than that all have the same value. What is not working?
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