MATLAB: Extract multiple images from white background individually

extract image

Hello,I want to extract images from white background. In order to analyze each image individually, I should have matrix of each image. My code works well when there is just one image on the white background. Can any one help me to extract more than 1 image from white background? This image is an example:
and my codes are:
rgbImage=imread('D:/2ta.jpg');
grayImage = min(rgbImage, [], 3);
binaryImage = grayImage < 200;
figure(1)
imshow(binaryImage)
%binaryImage1 = bwareafilt2(binaryImage,[10 50],1,1);
binaryImage1=(binaryImage==1)
figure(2)
imshow(binaryImage1)
[rows, columns] = find(binaryImage);
row1 = min(rows);
row2 = max(rows);
col1 = min(columns);
col2 = max(columns);
% Crop
croppedImage = rgbImage(row1:row2, col1:col2, :);
figure(3)
imshow(croppedImage)

Best Answer

You need to label your binary image and then get the bounding box of all blobs in it, then crop them out using the bounding box and the imcrop() function.
[labeledImage, numBlobs] = bwlabel(binaryImage);
props = regionprops(labeledImage, 'BoundingBox');
for k = 1 : numBlobs
    thisBB = props(k).BoundingBox;
    thisImage{k} = imcrop(rgbImage, thisBB);
    imshow(thisImage{k});
    drawnow;
    imwrite(......  % If you want to save the cropped image to disk.
end
Related Question