-Superscript/subscript letters and complex mathematical formulas

-Characters are written against an unevenly-colored or patterned background

*Characters to which effects (Shadow, Outline, and the like) are applied

*Shaded characters

-Documents of complex layout as well as documents including unreadable characters (due to print-through and smudges)

(It may take an extended period of time to scan documents described above.)

These documents may be correctly converted if scanned at a higher resolution and/or in different Color mode.

●When PDF files are converted into searchable ones, textual information is embedded in the PDF files. Thus, the PDF files are updated.

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