MATLAB: Number of pixel, image outline and image processing

areaboundaryimageimage processingpixels

I'm still new in Matlab. I had segmented gray scale image into four regions like this.

http://i44.tinypic.com/2nq8piw.jpg

I would like to calculate area/no. of pixel for each region within each human image. My idea is drawing outline of each human images and then calculate no. of pixel for white, light gray and dark gray regions in the image. Is there any idea to do that, or better idea? What i learnt and found only the method for binary image, not same with this one.

Thanks in advance.

Best Answer

doc bwconncomp
doc regionprops
doc bwarea

Related Solutions

MATLAB: How can i separate all the connected regions in a binary image and display them individually.

Use bwlabel() and ismember

[labeledImage, numRegions] = bwlabel(binaryImage);
props = regionprops(labeledImage, 'Area')
% Compute all the areas.
allAreas = [props.Area]
% Display each blob in its own figure.
for k = 1 : numRegions
    thisRegion = ismember(labeledImage, k);
    figure;
    imshow(thisRegion);
    drawnow;
end

MATLAB: Number of Object in binary image

Try this:

bw = imread('bw.png');
if ndims(bw) > 1
	bw = bw(:,:,1);
end
% Threshold
bw = bw > 128;
subplot(1, 2, 1);
imshow(bw, []);
% Fill holes
bw = imfill(bw, 'holes');
% Get areas
props = regionprops(bw, 'Area');
sortedAreas = sort([props.Area], 'descend')
% Looks like we need to throw away any blobs less than 1000 pixels or so
bw = bwareaopen(bw, 1000);
subplot(1, 2, 2);
imshow(bw);
% Count the blobs
[labeledImage, numBlobs] = bwlabel(bw);
fprintf('Found %d shapes.\n', numBlobs);

Best Answer

Related Solutions

MATLAB: How can i separate all the connected regions in a binary image and display them individually.

MATLAB: Number of Object in binary image

Related Question