Hi,
using imcrop you can also specify the coordinates of the box. Then you do not have to click. But you have to know the position in advance.
If you are looking for a method that detect the position of the man, this is an image segmentation problem. There are various methods in image processing toolbox. One possibility is to try to use graythresh function, together with im2bw. There are other more complicated algorithms, the most appropriate one depends on the kind of image.
You can extract the bounding box of a region with the "regionprops" function, using the 'BoundingBox' tag.
Regards, David
