matlab divide an image according to the user input

Question

I have an Image :

I want to manually divide the image into the parts as show below: The division of the image should be user controlled. I should be able to take the user input of the rectangular squares in which I am trying to divide the Image.

The output is shown below :

How can I do this in matlab?

After operating on the individual images can I join them back together to make the image as one ?

Answer 1

Use imrect to create an interactive rectangular selection tool on top of the input image. Look closely at the second example.

Once the user has selected a rectangel, you can use imcrop to get the corresponding part.
Saving the relative position of the selected rectangle (ie, the position vector [xywh] ) you can then "re-embbed" the part into the original image at the same location.

Answer 2

I finally got it . Thanks !

Img = imread('cameraman.tif');
figure();
imshow(Img);
h = imrect();
crop_area = wait(h);
cropped = imcrop(Img, crop_area);
imshow(cropped);

This works well.