I.R.I.S. IRIScompressor Standard - Manual (Page 13)

IRISCompressor
TM
– User guide
13
Format
Select the output format you want to generate: PDF or XPS.
Important note: Adobe Reader is recommended to open
compressed PDF files on a mobile OS (e.g. on an iPad or Android
tablet)
OCR
Select Enabled in case you want IRISCompressor to recognize the
text in your images. IRISCompressor will then generate text-
searchable output files. If OCR is disabled, IRISCompressor just
compresses your images without recognizing the text.
Note: the OCR language is the one you selected during installation.
To select a different OCR language, remove and reinstall the
application while selecting a different language.
Note: make sure the OCR language you select corresponds to the
language of your files. Selecting the wrong language will lead to
unsatisfactory OCR results.