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Compatability
v2

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Slueth is an application that can take scanned documents and turn them into fully editable text. Sleuth uses a process called OCR (Optical Character Recognition). This is a process whereby text is extracted from a scanned image and converted into a plain text file. OCR has been available for some time on other machine platforms and accuracy has been steadily improving. Sleuth 3 can be used with the majority of scanners available for RISC OS computers.

Twain drivers

Sleuth supports TWAIN to allow direct scanning into the package. To use this facility you must have a copy of TWAIN, an appropriate scanner and Scanner Driver. TWAIN and scanner drivers can be downloaded from:

https://www.davidpilling.com/wiki/index.php/TWAIN

TWAIN supports the Select and Acquire options on the Sleuth Scan menu.

Without Twain Drivers

You can still use Sleuth even if you don't have compatible Twain drivers. You can scan from another RISC OS application and then import the images into Sleuth or you can even import images that have been scanned via Windows, mac OS X or Linux.

Greyscale sprites

Sleuth will accept greyscale sprites and convert them into monochrome sprites. Using the Input and processing preferences dialogue box, the user can determine the levels of grey converted to white in this process. A Pre-sharpening facility is provided that will generally improve the quality of degraded text during conversion.

Why is Sleuth 3 slower than Sleuth 2?

The main reasons are:

  • Sleuth 3 uses a more careful initial segmentation of each line into letters as described earlier.
  • Sleuth 3 has a more sophisticated spellchecker which uses information about word frequencies (eg it knows that 'the' is more likely than 'tho'). It also incorporates a user dictionary.
  • Sleuth 3 does more processing of graphics, which aids the division into text and graphics and the segmentation of text areas, eg using vertical rulings.
  • Sleuth 3 is trained on more fonts and a wider variety of text qualities, including symbols that have been artificially 'faxed'.

sleuth3 windows

 

 

 

 

 

 

 

 

 

 




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