Image cropping same portion from every side

I have a image

i want to crop the image such a way that same area is cropped from each 4 sides. like :

and then at the end i'll get the result image as

how will i do this?

how to use imcrop() function here?

Answer 1

[Image Analyst]

You can use imcrop like this:

[rows, columns, numberOfColorChannels] = size(rgbImage);
n = 40;
croppedImage = imcrop(rgbImage, [n, n, columns - 2*n, rows - 2 * n);

The above code works for either an RGB full color image, or a gray scale image.

Or you can use indexing. For a full color image, you can do

croppedImage = rgbImage(n:rows-2*n, n:columns-2*n, :);  % For RGB image

Or, for a gray scale image:

croppedImage = grayScaleImage(n:rows-2*n, n:columns-2*n);  % For a gray scale image

[Image Analyst]

If you need to figure out what n is , then that's a different question than how to crop an image.

Answer 2

[Stalin Samuel]

n=50
[r c] = size(a)%%a is the input image
eim = a(n:r-n,n:c-n)  %%eim croped image

[Priyanka Roy]

what is s & m here?