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SQThreshold.doc
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SQThreshold.svoperator
© 1995 by Steve Quartly.
FREEWARE. All rights reserved.
Version : 3.1
Release Date : 16.02.1996
Requirements
~~~~~~~~~~~~
- OS V2.04+ (V37)+ and its libraries
- superviewsupport.library V5+
Description
~~~~~~~~~~~
SQThreshold.svoperator is an external SV_GfxBuffer modification module
for superview.library.
This operator converts an image to two colours, black and white, based on
a threshold.
***NOTE: This operator will only work on a 24 bit buffer. This is not a
major problem as you can apply the AnyTo24Bit.svoperator first and then
apply this operator quite successfully.
ControlPad-Switches
~~~~~~~~~~~~~~~~~~~
ControlPad-Name : "ENV:superview-library/SQThreshold.controlpad"
ControlPad-Commands : - PERCENTAGE=<1..100>
; This is the threshold point.
;
; The following controlpads allow you to apply
; this operator to a rectangular region of the
; image.
- LEFTEDGE=<Value>
; crop from x position
; (will be adjusted, if >= source width)
- TOPEDGE=<Value>
; crop from y position
; (will be adjusted, if >= source height)
- WIDTH=<Value>
; crop how many x pixels from leftedge
; (will be adjusted, if too large)
- HEIGHT=<Value>
; crop how many y pixels from topedge
; (will be adjusted, if too large)
Author
~~~~~~
Steve Quartly
1280 Stevens St
MUNDARING
Western Australia steveq@sndcrft.DIALix.oz.au
History
~~~~~~~
V1.0 (01.09.1995) :
- first public release
V3.1 (1.1.1996) :
- added progress indicator support