3-d plot

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Hassan 2011-12-17

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链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/24199-3-d-plot

I have two matrixes: I is a grayscale image and BW is the binary image. for the regions that have area>50 in BW, I want to calculate the mean value of the those regions in I. I then want to show these mean values for each region as bar plot on the grayscale. Any suggestion?

I used the following code to show the mean value of each region on the image but dont know how to show them as bar.

% create a synthetic image
I = propsSynthesizeImage;
%a create binary image
BW = I >0;
%find the centroid of each region
s = regionprops(BW, I, {'Centroid'});
imshow(I)
title('Weighted (red) and Unweighted (blue) Centroid Locations');
hold on
numObj = numel(s);
%plot the centeroid of each region on the image
for k = 1 : numObj 
  plot(s(k).Centroid(1), s(k).Centroid(2), 'bo');
end
hold off
s = regionprops(BW, I, {'Centroid', 'PixelValues', 'BoundingBox'});
imshow(I);
title('Standard Deviation of Regions');
hold on
%calculate the mean value of each region and plot them on the image
for k = 1 : numObj
    s(k).Mean= mean(double(s(k).PixelValues));
    text(s(k).Centroid(1),s(k).Centroid(2), ...
        sprintf('%2.1f', s(k).Mean), ...
        'EdgeColor','b','Color','r');
end
hold off