Are you looking for a little help Digitizing Photos and Documents with the GeneaBloggers Genealogy Do-Over?. This week, GeneaBloggers Thomas MacEntee gives tips for eight best practices, including scanner settings, file formats, and duplicate copies for editing.
You might be wondering why 300 or 600 dpi? Why TIFF? and Why create an archival TIFF copy? Good questions!
Why Use a Standard Scanning Resolution?
In researching standard best practices for archiving family history materials, I looked at the common practices of museums, libraries and archives nationwide where staff members and interns routinely digitize thousands and thousands of items. I learned that higher resolutions are used for film and for photo restoration projects, but for most items that will be viewed digitally or printed at the same size as the original, a standard scanning resolution is adequate and recommended.
For institutions where volunteers and interns may be performing much of the digitizing and for family historians interested mostly in sharing and archiving photos and documents, standard scanner settings are efficient and easily understood.
Archives typically recommend scanning documents at 200 to 300 dpi and scanning photographs at 600 dpi. Images scanned at 300 dpi or more should print fine at the original size.
You may have heard recommendations to use the archival TIFF format when scanning your heirloom document and photos and been reluctant to devote computer storage to such large digital files. What could be so much better about a TIFF file?
Thomas is right -- whenever possible, TIFF is the preferred file format for digitizing keepsake photos and documents. If you're going to the trouble to scan and save these items, scan only once with the optimal file format and resolution. Tagged Image File Format (TIFF) is a non-lossy archival format. The plain English translation: TIFF files aren't compressed when saved, so your file retains all of the digital information. In contrast, JPG files are lossy files; the file is compressed each time a file is saved and some information is lost.
Why Create a JPG Copy of a Digital Image?
Yes, TIFF files are large, but TIFF is the best choice for archiving. Create a duplicate file in JPG format to use for editing, email, and photo projects. Archive the TIFF version as Digital Insurance to help you recreate a lost or damaged original in case of disaster. If your original is a JPG format image, create a copy in TIFF or JPG and designate it as your Digital Master.
Learn more best practices for working with digital images in my paperback or ebook edition of How to Archive Family Keepsakes including
- easy scanning workflows
- file naming
- folder organization
- recommended digitizing resolutions
- backup strategies
- scanner suggestions