I.R.I.S. Readiris 14 for Windows User Guide - Manual (Page 93)

Section 9: Saving Documents
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Note: since the image covers the text, any recognition
mistakes will not be visible.

PDF Text-Image. This file type is the opposite of PDF
Image-Text. It contains the original image in the
background, and the recognized text on top of the
image.
Note: any recognition mistakes will be visible in this
format.

PDF Text. This file type contains the recognized text,
but does not contain the original image of your
document. Any images in the original document are
included as graphics in the PDF file.

PDF Image. When you select this file type, Readiris
doesn't execute the text recognition on your document.
Your PDF file will not be text-searchable, it only
contains the image of your original document.
Note: many options are available for PDF files. Readiris
can generate hyper-compressed PDF files, password-
protected PDF files, digitally signed PDF files, PDF/A-
compliant PDF files. See the section Selecting the PDF
Options for more information.
Tip: with Readiris you can also turn Image PDFs into text-
searchable PDFs.

XPS
XPS stands for XML Paper Specification. It is a fixed-layout
document format designed by Microsoft Inc. to preserve document
fidelity. XPS files - just like PDF files - are mostly used for storage
purposes. Note that the content of XPS files cannot be edited
(easily).
With Readiris you can generate 4 types of XPS files: