PDF stands for "Portable Document Format". It is a format developed by Adobe Systems Inc. to facilitate document exchange. PDF files are device-independent and resolution-independent, and can be opened on any Operating System (Windows, Mac OS, Linux, iOS, Android, etc.) PDF files are mostly used for storage purposes. Note that the content of PDF files cannot be edited (easily).
With Readiris you can generate 4 types of PDF files:
PDF Image-Text. This file type is most commonly used. It contains two layers: the recognized text, and the original image on top of the text. This way, you have both access to the recognized text and you still see the original image.
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 does not execute the text recognition on your document. Your PDF file will not be text-searchable, it only contains the image of your original document.
It generates PDF files that are suited for long-term archiving.
The option Embed fonts, embeds - or includes - the original fonts of your documents in the PDF file. This way, other users will always see the documents in their original fonts on their computer, even if they don't have the particular font you used installed on their computer.
Note that embedding fonts increases the file size of your output documents.
Bookmarks are types of links inside a PDF document, which contain representative information about the section they are linked to. Bookmarks give structure to your PDF documents. They are grouped in the Bookmarks panel in the Navigation pane.
In Readiris, the option Create bookmarks creates a bookmark for each text zone, image zone and table zone inside a PDF file.
This option restructures a PDF document for page-per-page downloading from web servers. This option is useful when accessing the documents you sent to the Cloud.
In Readiris you also have the possibility to hyper-compress your PDF documents with iHQC. iHQC stands for intelligent High-Quality Compression, I.R.I.S.' proprietary, efficient compression technology. iHQC is to images what MP3 is to music and what DivX is to movies.
iHQC is available for Image-Text and Image PDFs.
Select the compression type:
(Available in Readiris Pro and Corporate)
Good quality - best compatibility: no use of wavelet compression (JPEG2000) and no use of symbols compression (JBIG2).
Good compression - best compatibility: does the same as the previous option but with more aggressive compression factors for the background and foreground images.
(Available in Readiris Corporate only)
Better compression - good compatibility: use of symbols compression (JBIG2) but no use of wavelet compression (JPEG2000).
Better compression - good quality: use of symbols compression and wavelet compression with moderately aggressive compressions factors
Best compression: use of symbols compression and wavelet compression with more aggressive compression factors.
Custom : use of symbols compression, wavelet compression and compression factors are set freely.
(This section applies to Readiris Corporate only)
The PDF documents you generate with Readiris can be password-protected. You can set a password to open the documents, and a password that restricts modifications to the documents.
When you set an open document password, you will be prompted to enter that password when opening the PDF output.
When you set a permissions password, you will only be able to perform the actions specified in the security settings. If you do want to change these settings, you must enter the permissions password.
The Readiris security settings are similar to the standard protection features offered by Adobe Acrobat.
Note that in Readiris the open document password and permissions password must be different.
(This section applies to Readiris Corporate only)
The PDF documents you generate with Readiris can be digitally signed. Digital signatures identify the person who created the PDF documents; they authenticate the identity of the author, certify a document and help prevent unwanted changes to PDF documents.
Note: Readiris does not generate digital signatures. You need to have a digital certificate at your disposal to generate signed documents with Readiris. You can create digital certificates with Adobe Acrobat, with the certificate assistant in the Keychain Access, or obtain them from companies like VeriSign.
To generate digitally signed documents:
Click the Signature tab to access the signing options.
Select Sign with a digital identity then browse for the certificate of your choice.
Click OK
The digital signature will be included at next export as PDF.
Tip: If you do not see any identity in the drop
down list, make sure you have a valid certificate (digital identity) and
its associated private key available in Keychain
Access.
See the Adobe documentation for more information about certificates.
When you use a digital signature, it appears in the Signature Panel of Adobe Acrobat Reader DC.