NAME
acuity_nightvision_filter - visual acuity and nightvision
simulations
SYNOPSIS
#include "CVIPtools.h"
#include "CVIPtoolkit.h"
#include "CVIPconvert.h"
#include "CVIPimage.h"
#include "CVIPdef.h"
#include "CVIPfs.h"
#include "CVIPhisto.h"
#include "threshold.h"
#include "CVIPspfltr.h"
Image *acuity_nightvision_filter(Image *cvipImage,char rea-
son, int threshold, int choice)
<cvipImage> - pointer to an Image
<reason> - y = nightvision, n = acuity simulation
<threshold> - binary threshold for nightvision simulation
<choice> - visual acuity value (20, 30, 40, ...)
PATH
$CVIPHOME/SPATIALFILTER/nightvision.c
DESCRIPTION
Performs visual acuity and nightvision goggles simulations.
For visual acuity, set <reason> to 'n', set <threshold> to
-1, and specify the desired acuity <choice> as the numerator
of a standard visual acuity rating, such as '50' to simulate
20/50 vision.
For nightvision goggles simulation, set <reason> to 'y',
select a threshold value (1-154), and set <choice> to -1.
TYPES AND CONSTANTS
None
RETURN VALUES
A modified image
HISTORY
History information recorded: None
SEE ALSO
libspatialfiltr
AUTHOR
Copyright (C) 1996 SIUE - by Scott Umbaugh, Mark Zuke and
Kun Luo.