how to crop a interest part image

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I have this image i segmented by kmeans méthod, and i get this résult
Now i want to crop it to get just the license plate
, so there is a solution ???
please help me .

Accepted Answer

Image Analyst
Image Analyst on 11 Apr 2015
Just get profiles and use find:
verticalProfile = sum(binaryImage, 2); % Sum along columns in each row.
row1 = find(verticalProfile, 1, 'first');
row2 = find(verticalProfile, 1, 'last');
horizontalProfile = sum(binaryImage, 1); % Sum along rows in each column.
column1 = find(horizontalProfile, 1, 'first');
column2 = find(horizontalProfile, 1, 'last');
croppedImage = binaryImage(row1:row2, column1:column2);
Image Analyst
Image Analyst on 12 Apr 2015
You're obviously not using the image that you posted and gave to me. The image you posted is a color image, but the one you're using is a grayscale image. So you need to put this code after your call to imread():
if numberOfColorBands >= 3
% Crop the image
rgbImage = rgbImage(50:400, 100:600, :);
% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
% Crop the image
grayImage = redChannel;
% It's already gray scale.
% Crop the image
grayImage = rgbImage(50:400, 100:600, :);

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More Answers (1)

guitoune mohieddine
guitoune mohieddine on 12 Apr 2015
Edited: guitoune mohieddine on 12 Apr 2015
thank you , it works

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