String Options for ScanFix(TM) Pro for Calera's Wordscan

ScanFixTM has several  features which are not accessible from
the ScanFix Professional window.  These are controlled through
String Option Parameters.

The general format of these String Options is AAAA=# or AAAA=ON,
where AAAA is the String Option name in capital letters,  # is a
numeric parameter to be passed to the option, and ON invokes the
option.

 HINT:  Highlight the commands in this screen, then use
 EDIT-COPY.  Then return to String Option Box and at the cursor
 press Ctrl V.  The command will be transferred automatically.
 Then enter the value desired. To turn off an option after using
 it, enter OPTION=  with no value.  Options are off, unless
 invoked. Clearing the Option String field and rebooting
 WordScan, also turns all options off.

 Note: Use a Space between multiple String Commands, and use the
 same letter case as in the documentation.

Enter as many of these features as you like (be sure to put one
white space between each) on the white line in the 'String
Options' window.  

To turn off an option after using it, simply remove it from the 
box. Important: If the "Cancel" button is used on this or the 
preceding windows, changed values will be lost, so use "OK"
Options are off, unless invoked. 

  AutoRotate(TM) Feature

This automatically detects landscape, upside down and 270 degree
scans and rotates them thereby orienting the text  upright. If
only landscape or upside down images are a problem, then only
one of  the two string commands are necessary.  If images can be
scanned 90 degrees, 180 degrees, and 270 degrees from correct
orientation, use both SFLANDUP and SFDOWNUP.

  SFLANDUP=#

This option controls the ScanFix AutoRotate feature.  It
automatically detects the  orientation of a page and rotates the
image so that the text is upright.  Set higher to make a  more
reliable (slower) decision, and set lower for speed.  The
recommended setting is  SFLANDUP=20.  If this does not work,
then increase the parameter to 40, 100 or 1000.  Higher values
slow it down, but can assure the correct rotation of difficult
images.  Some images can not be AutoRotated.  

  SFDOWNUP=# 

Automatically rotates upside down scans.  Use with SFLANDUP for
270 degree scans. The recommended setting is SFDOWNUP=5.  If
this does not work rotate, use 3. If it makes mistakes then
increment 10, 20, 50.  Some images can not be AutoRotated.Lower
numbers are more likely to rotate an image. Higher numbers are
less likely to mistakenly rotate images. Lower case print on a
document is essential for this feature to detect image
orientation.


               FINER REGISTRATION CONTROL

These options differentiate between random noise at the edge of
an image and the text or form itself.  They do so by taking into
account the amount of "activity" in the area where the edge of
the information should be.  Text will produce consistent high
activity; random noise will have less activity, and white space
will have no activity at all. Only use these options if you need
to.  

  SFREG_WIDTH=#

Set the parameter # to the width of consistent activity (in scan
lines) which indicates the edge of information.  For example, if
there is significant activity for less than X scan lines, the
activity is considered to be random noise.  The default is 5.
Values up to 20 work well on 300 dpi images, and consistently
ignore perpendicular lines. Smaller values down to 1
consistently trigger off of lines, or dot matrix print.

  SFREG_MIN=# 

Set to the noise threshold.  If you want Register to be more
willing to treat image activity as noise (and ignore it for
registration) try a higher value.  The default is 1, which is
maximally sensitive. 5 is less sensitive.

  SFREG_GAP=#

Set # to the amount of white space that may be found between
bits of edge noise. This defaults to 5.            


                      FAX HEADER CONTROL

We now have a feature which exempts the top scan lines of your
document from all enhancing.  This was designed specifically for
the headers which are commonly found on the top of faxed
documents. 

This string option is used as follows :  SF_FAXHDR=## 
This option assumes that the top ## lines are fax header. 

  SF_FAXHDR=I## 

Assumes that the top ## 100ths of an inch are fax header.   We
included the latter so that high and low resolution images could
be passed without regard for their resolution. The ' I ' stands
for inches.

                  Additional String Options

  SFINV_DENSITY=## 

Allows control of the invert manager's analysis of what ratio
white to black should be found in an image.  The value
represents the number of  white pixels per 100 black pixels
above which the inverter decides that the zone is not an invert
zone.  The default is 200.  Higher values detect lighter zones.

  SP_DENSITY=# 

Set this parameter # to a small negative value if the shaded
zones are very sparse.  Set to a small positive value if the
shading is very dense. For example set the parameter # to  -2
for sparse shading that is not handled well by the default
settings. 

  SFSHADE_AFTER=ON

This option moves the shade-zone analysis until after lines are
removed. This allows the line remover to find lines which may be
damaged by the De-Shader, it also allows the De-Shade function
to find shaded zones better within grids of lines.  However, the
line detector may see lines where there are none inside shaded
areas, and my do reconstructions where shading dots touch lines.

  SFSPECK_AFTER=ON

This option moves the random speck removal operation to after
line removal. This allows the line remover to find lines which
may be damaged by speck removal.  However, the line detector may
see lines where there are none inside shaded areas, and my do
reconstructions where noise touches lines.

  SF_SKEWTO=#

Rotates an image by the stated amount, where 100 means rotate
the image clockwise by 1 pixel in 100     (100 = 1 %,  33 = 2%, 
25= 4%,  20 = 5%). Using a negative # will rotate the image
counter clockwise. This function occurs as a separate process
after Deskewing is done.

  SFFACTOR=#

If your document has only very large print, and ScanFix fails to
establish the image's skew, use a higher number. Try 200, 400,
or 500.  If your document has  small dense print, especially if
it has vertical lines, try a smaller number such as 40 or 20. If
you use a very small number such as 1 or 2, then ScanFix will
require solid horizontal lines for skew detection.  The default
value is image resolution dependant, and is 70 on 300 dpi images.

  RE_SIZE=#,#,#,#,#

Re-sizes the image immediately after loading.  The first four
#'s represent the four sides of the image: Top, Right, Bottom,
and Left.   A value of 10 for any number will pad the
appropriate edge by 10 pixels, a value of -10 will remove 10
pixels from the specified edge.  The fifth parameter indicates
the color of the padding.  WHITE = 1 and  BLACK = 2.

For example, RE_SIZE=10,10,10,10,2  will put a 10 pixel black
border around your image prior to any other activity.

  SF_LEN=#

Trims the resultant file to not have more than  # scan lines.


       Thank You from Sequoia Data for using ScanFix!