The following is a Plus Edition article written by and copyright by Dick Eastman.I have written several times about the method of creating and preserving digital images. I have also written about scanning old photographs as well as scanning various printed or hand-written documents. Today I thought I would discuss the various file formats available and briefly describe the advantages and disadvantages of several of the more popular formats.
Today's technology allows for a selection of image file formats, including JPG, GIF, TIFF, BMP, PSD, RAW, PNG, EPS, PDF, and others in a seemingly endless alphabet soup of abbreviations and acronyms.
You can find several good reasons and bad reasons for selecting any of these file formats. However, from a genealogist's point of view, there are two significant issues to deal with: image size and image compression.