Thank you. We have experimented with the -f value and were not able to achieve the desired result.
We are interested in less
crop in order to be in sync with U.S. National Archives and Records Administration (NARA), Library of Congress (LOC) and World Digital Library (WDL) cropping guidelines - which we understand to require that we crop beyond the edge of the original object and to leave enough of the scanner bed showing such that researchers can clearly discern that the entire object was scanned. I think that the Multicrop script's cropping level may meet the "technical" definition of what we are trying to achieve - but our initial sense is that the crops are quite a bit tighter than what we have been doing traditionally - and what we see being done by other digital library projects. More research on this question may be required on our part - but suspect that there is a wider crop option - or related strategy - with this script will be very helpful.
As for adding a border color - our sense is that this would not satisfy the digitization guidelines. Again, this is our sense and has not (yet) included sufficient research and investigation.
Here, for instance, are a couple of quotes from the LOC and WDL documentation:
Cropping for Pictorial Materials. The Library wishes to provide researchers with a reproduction of the entire original item. Thus, images shall be framed and cropped to show the entire original item and beyond the item(s) edges. ... from The Library of Congress Technical Standards for Digital Conversion Of Text and Graphic Materials
Cropping of bound and manuscript materials. The Library requires presentation of the entire
original sheet or page. In no event shall the actual document be cropped. Researchers using
Library of Congress digital documents often wish to be reassured that the entire document has
been captured. This is especially desirable for unbound manuscript documents. A "border zone"
approximately 1/4-inch or less of the surface behind the scanned document shall be provided
whenever possible. ... from The Library of Congress Technical Standards for Digital Conversion Of Text and Graphic Materials
Thanks very much for your assistance and please let me know if I can provide additional information regarding our request for assistance.