I use an imaging sdk which can create thumbnails found on the internet .
Install it and it becomes a selectable processing option.Then you can
create thumbnails in your image in any program at all, including Adobe
Acrobat . Just open the images, select thumbnail,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/thumbnail-creating/
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