I.R.I.S. Readiris Corporate 12 for Mac User Guide - Manual (Page 86)

Chapter 11 – Recognizing large volumes of scanned images
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o Select Process subfolders to process all subfolders of the
image folder. If the output folder differs from the image
folder, all subfolders will be recreated in the output folder,
mirroring the structure of the image folder.
o Select Overwrite text files to overwrite previous
recognition results.
o Select Delete images after processing to delete the files in
the image folder.
 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.