How can i crop multiple images
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shru s
am 28 Mai 2017
Kommentiert: Image Analyst
am 28 Mai 2017
Hello, I have, with the help of regionprops, drawn a bounding box around the parts I would like to crop. Could anyone tell me how i can crop the images and store it. Thank you. Edit: I am trying to crop handwritten characters.
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MathReallyWorks
am 28 Mai 2017
Hello shru,
Use this code for properly cropping the regions and saving them in a folder:
grayImage = imread('shapes.png');
[rows, columns, numberOfColorBands] = size(grayImage);
if numberOfColorBands > 1
grayImage = grayImage(:, :, 2);
end
binaryImage = grayImage > 128;
binaryImage = imclearborder(binaryImage);
binaryImage = bwareaopen(binaryImage, 1000);
labeledImage = bwlabel(binaryImage, 8);
[labeledImage, numberOfBlobs] = bwlabel(binaryImage);
blobMeasurements = regionprops(labeledImage, 'BoundingBox');
for m=1:numberOfBlobs
BB(m,:) = blobMeasurements(m).BoundingBox;
end
txt=['A' 'B' 'C' 'D' 'E' 'F' 'G' 'H' 'I' 'J' 'K'];
% txt is Random matrix of character for naming the files for saving them
for i=1:numberOfBlobs
imagen = imcrop(grayImage, [BB(i,1)-5 BB(i,2)-5 BB(i,3)+10 BB(i,4)+10]);
figure,
imshow(imagen);
saveas(gcf,txt(i),'jpg'); %All cropped images are stored with the names A,B,C,D etc.
end
original image:
Result:
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