extract multiple images from white background individually
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Fateme Jalali
il 29 Lug 2016
Modificato: Image Analyst
il 29 Lug 2016
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:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/155239/image.jpeg)
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)
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Image Analyst
il 29 Lug 2016
Modificato: Image Analyst
il 29 Lug 2016
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
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