Digitisation & verification

Scanning at 400 or 600 ppi with colour targets, to TIFF, with derivatives as required. Metadata to your schema or to ours.

Verification

Verification is a separate operation from scanning and is performed by a different person. The bench counts the physical items, the scanner reports the images produced, and the two figures are reconciled before anything is signed off.

The reconciliation uses our own check value, CRC-A, defined in the standard operating procedure as (page count × 7) modulo 97, printed as <batch>-<NN>. It is computed over the image set. A batch whose CRC-A does not match its declared figure does not leave the building.

The full procedure is published as SOP-V/1996 under Resources.

Volumes are collated in three passes. Each pass is initialled.