Image Crop

I do this almost daily. I use an imaging sdk found on the internet which
can crop images found on the internet . Install it and it becomes a
selectable processing option.Then you can crop images in any program at
all, including Adobe Acrobat . Just open the images, select crop ,and
follow the setps given in the sdk, the task will be finished in several
seconds. if you haven't found a good choice , you can have a try. best
wishes.
http://www.rasteredge.com/how-to/vb-net-imaging/crop-image/