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1990-04-29
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SELECT THE FOLLOWING OPTIONS:
INPUT..............Enter the source of the image to be processed. This may be
either directly from your scanner (if it is one of the supported types) or an
intermediate image file produced by your scanner software. To select direct
scanning, enter the word "SCANNER" here. To select a file, enter the name of
the image file produced by your scanner software. Currently supported types
are TIFF (both compressed and uncompressed) and PCX (PC Paintbrush) files.
Be sure to include the extension in the file name (i.e. .TIF or .PCX) so that
PRO-CR<tm> can determine the file type. For the case of PCX files, it is
necessary for you to set the resolution that the image was scanned at (since
the majority of PCX producing software does not include this in the file).
Use the "dpi" option to set this.
OUTPUT.............Enter the name of the file you wish PRO-CR<tm> to write the
ascii text into. Note that PRO-CR<tm> will create the specified file if it
does not already exist and will append text to the specified file if it does
exist.
#
Options (continued)
DPI................Enter the resolution in dots per inch. There are 2 cases
when this is important. (1) When you are scanning directly. This tells the
scanner what resolution to scan at. (2) When you are processing an image file
and the file does not contain the image resolution. This is always true of
PCX files and is sometimes true of naughty TIFF files. (It is rare for TIFF
software to omit the resolution and you may assume it is present unles
PRO-CR<tm> warns you otherwise. Never assume a PCX file contains the image
resolution though!).
Knowing how to set the right dpi for DIRECT SCANNING:
PRO-CR<tm> has been written to run best at 200 to 300 dpi. 200 dpi
covers the fax standard and most hand scanners. (Some popular hand
scanners claim 300 and 400 dpi modes, however many simply duplicate
pixels to match printer resolutions and therefore add no more information
to the scan for OCR purposes). For reasonably sized text 200 dpi should
be adequate, but if the text is tightly spaced (runs together) then 300
dpi should help. PRO-CR<tm> allows a range of 100 to 400 dpi for
experimentation purposes. In general, try 200 dpi first and then 300.
#
Options (continued)
UNKNOWN CHAR.......Enter the character you wish to be embedded in the output
text to flag characters that could not be recognized. This is useful if you
use an editor after the recognition phase to correct mis-recognitions. It
allows you to search for this character to speed up the correction phase.
Use of a spelling checker should also prove helpful.
PREVIEW............This function is active if a check mark appears next to it
in the menu. The function is toggled on and off by repeatedly selecting it.
When active, as much of the image as can fit on the screen in displayed prior
to being processed. This is useful to examine the quality of the scan, for
skewed paper, lack of contrast, suitable resolution etc. This function is
only available for users with a suitable graphics adapter.
#
Options (continued)
CORRECT............This function is active if a check mark appears next to it
in the menu. The function is toggled on and off by repeatedly selecting it.
When active, you will be allowed to correct mis-recognitions online during the
OCR processing phase. You will be prompted for the correct character(s) when
a mis-recognition occurs. At the lower right hand side of the screen an image
of the mis-recognized character(s) will appear for you to correct. If you are
unable to recognize the text, hit return and the text will be replaced by the
"unknown" character mentioned above. You may also hit Escape to abort the
processing. This function is only available to users with a suitable graphics
adapter.
SCANNER TYPE.......Select your scanner type from the list. At the time of
writing (4/16/90) only the HP ScanJet is directly supported, however the
Logitech SCANMAN is planned shortly.
#