I.R.I.S. Readiris Corporate 12 for Windows User Guide - Manual (Page 108)

Chapter 14 – Recognizing large volumes of scanned images
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The text folder must be different from the image folder. One folder
must not be a subfolder of the other either.
 Click the Text Format button to select the required external file
format and its options.
For more information on the formatting options, see the chapter
Formatting and saving documents.
 Click OK to monitor the Watched Folder.
Readiris processes the images of all supported file formats. You
cannot limit the OCR to files of a specific file format.
The recognized documents are saved as external files in the indicated
text folder and get the same file name as the original image files.
All images are deleted automatically from the image folder once they
have been recognized. Otherwise, they would be processed over and
over again.