how to use imcrop function in matlab

The imcrop function is used to extract a part of an image in MATLAB. Following is the syntax of the function:

main.m
B = imcrop(A, rect)
20 chars
2 lines

where A is the input image and rect is a four-element position vector [xmin ymin width height], specifying the size and position of the crop rectangle.

Here is an example code snippet to crop a rectangular region from an input image:

main.m
% Read the input image
I = imread('example_image.jpg');

% Plot the input image
imshow(I);

% Use imrect to draw a rectangle on the image
h = imrect;

% Wait for the user to finish drawing the rectangle
wait(h);

% Get the position of the rectangle
crop_rect = getPosition(h);

% Crop the region using imcrop
J = imcrop(I, crop_rect);

% Display the cropped region
imshow(J);
376 chars
21 lines

This code will open a window displaying the input image, then allow the user to draw a rectangle on the image using the mouse. After the user finishes drawing the rectangle, the code crops the specified region using imcrop and displays the resulting image.