I.R.I.S. Readiris 14 for Windows User Guide - Manual (Page 103)

Section 9: Saving Documents
110
Note: with this third option, you can choose to save all
pages to a multipage image files, or save each page
separately in separate image files.

Name your document and select as which type of image you
want to save it.

Depending on the image format you select, a JPEG quality
slider may be available. With this slider you can determine the
quality of your image files.