The following is a Plus Edition article written by and copyright by Dick Eastman.
Genealogists love old books. Many of us would love to scan some of these books for our own use or to make them available to others when copyright laws allow. Scanned books can easily be distributed on CD-ROM disks or via online web sites. The only difficult part is the scanning of the original books.
Almost any scanner can be used to make images of old books. However, using a desktop scanner purchased at the local computer store has significant disadvantages. For one thing, these units are designed for scanning photographs and other individual sheets of paper. They do not work well for bound books. Trying to place a bound book onto the glass plate of a typical inexpensive scanner can damage the book’s binding. In addition, words printed near the center binding will not be flat against the glass, causing “curling.” That is, the images of the words seem to curve away from the reader. If OCR (Optical Character Recognition) software is used, the words near the center binding are difficult to decode and will lead to high error rates.
Here are some pictures illustrating the problem of obtaining good scanned images of pages bound in a book:
A scanner made for scanning bound books easily avoids these problems.