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.
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