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Appendix 1. About Searchable PDF Files
(1) What is a searchable PDF file?
When a paper document is scanned and stored in the form of PDF file, all information in the
document such as text, pictures, and charts is output as one image.
In such cases, characters in the scanned document are not searchable because they are the
image without textual information.
This being the case, you process the image data with OCR (text recognition) software to
retrieve textual information from the image and transparently superimpose the information
onto the image data. By doing so, the image data can be stored as a PDF file with textual
information.
Although such a PDF file appears to be image data, it has been made searchable, like the
text file, with textual information superimposed.
Only files scanned with the ScanSnap can be converted.
For details on how to convert PDF files into searchable PDF files, see “3.3. Converting
PDF Files into Searchable Ones.” (page 37)
ABCDEF
Image
ABCDEF
PDF
This image cannot be
searched for character
strings!