extract multiple images from white background individually

Question

Fateme Jalali 2016-7-29

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/297620-extract-multiple-images-from-white-background-individually

编辑： Image Analyst 2016-7-29

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)

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Answer 1

Image Analyst 2016-7-29

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/297620-extract-multiple-images-from-white-background-individually#answer_230198

编辑：Image Analyst 2016-7-29

在 MATLAB Online 中打开

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