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THRESHOLD

Section: User Commands (1)
Updated: 16 Mar 1998
Index

 

NAME

threshold - threshold an image with specified threshold

 

SYNTAX

threshold [-l <lpv>] [-h <hpv>] <input image> <output image> <threshold>

 

DESCRIPTION

thresholdthresholds an image. Pixels below orequal to thresholdis set to lpv(low pixel value),pixels above thresholdare set to hpv.Default values0 and 255 can be modified with the -l and -hswitches.

 if (old_pixel_value LE threshold) new_pixel_value = lpv
 else new_pixel_value = hpv;

 

RESTRICTIONS

Acepts only UNS_BYTE pixels.

 

AUTHOR

Tor Lřnnestad, BLAB, IfI, UiO

 

EXAMPLES

 threshold mona.img monath.img 110
 threshold -h 1 mona.img monath.img 150
 threshold -l 255 -h 0 mona.img monath.img 127

 

ID

$Id: threshold.c,v 1.26 1996/11/08 14:06:13 svein Exp $

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Index

NAME

SYNTAX

DESCRIPTION

RESTRICTIONS

AUTHOR

EXAMPLES

ID

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