Thursday, February 03, 2005

Scanning 19th Century Albumen Prints with DIGITAL ICE Photo Print Technology

To: conley@kodak.com

We purchased an EPSON Perfection 4870 Photo Scanner in the hopes of using [Kodak's] DIGITAL ICE Photo Print Technology to remove the fine surface cracks that are present in all 19th century albumen prints and which significantly degrade the quality of such scans.

An example of how badly scans of high quality images are degraded by these ubiquitous cracks can be seen on [a] 1,200 dpi scan ...

Unfortunately, because the cracks are of a much smaller scale than the macroscopic defects in cracked prints for which your software apparently is optimized, automatic defect removal just does not currently work. The microscopic cracks are well within the 4,800 dpi resolution of the Epson scanner, but the software does not correctly identify these as defects to repair. No reason is apparent why your method of doing a double scan with different lighting angles should not work equally as well at the smaller scale needed to remove these surface cracks

We hope that the DIGITAL ICE Photo Print Technology could easily repair the fine cracks seen in albumen prints, if the parameters of your algorithm could be adjusted by the user for the microscopic size of the cracks, or if a "fine surface cracks" option could be added to the software.

Would Kodak be willing to attempt to make DIGITAL ICE Photo Print Technology useful for scanning 19th century albumen prints? Most museums and libraries have 19th century photographic prints in their collections, so making Kodak's software work to automatically repair historic albumen print images would be extremely helpful. ...

Regards,

CPRR.org