EFFECTS

-unsharp percent
<?php
$IN="SGwoman.jpg";
$EFFECT="-unsharp 40%";
$OUT="SGwomanuns.jpg";
exec ("/usr/bin/convert $IN $EFFECT $OUT");
?>		ORIGINAL
 UNSHARP MASK
-despeckle
<?php
$IN="SGwoman.jpg";
$EFFECT="-despeckle";
$OUT="SGwomandesp.jpg";
exec ("/usr/bin/convert $IN $EFFECT $OUT");
?>		ORIGINAL
 DESPECKLE
-noise radius x sigma
<?php
$IN="SGwoman.jpg";
$EFFECT="-noise 6x3";
$OUT="SGwomannoise.jpg";
exec ("/usr/bin/convert $IN $EFFECT $OUT");
?>		ORIGINAL
 REDUCE NOISE
+noise filter
<?php
IN="SGwoman.jpg";
$EFFECT="+noise gaussian";
$OUT="
SGwomangaussian.jpg";
exec ("/usr/bin/convert $IN $EFFECT $OUT");
?>		ORIGINAL
 ADD NOISE
GAUSSIAN
<?php
IN="SGwoman.jpg";
$EFFECT="+noise impulse";
$OUT="
SGwomanimpulse.jpg";
exec ("/usr/bin/convert $IN $EFFECT $OUT");
?>		ORIGINAL
 ADD NOISE
IMPULSE
<?php
IN="SGwoman.jpg";
$EFFECT="+noise laplacian";
$OUT="
SGwomanlaplacian.jpg";
exec ("/usr/bin/convert $IN $EFFECT $OUT");
?>		ORIGINAL
 ADD NOISE
LAPLACIAN
<?php
IN="SGwoman.jpg";
$EFFECT="+noise multiplicative";
$OUT="
SGwomanmultiplicative.jpg";
exec ("/usr/bin/convert $IN $EFFECT $OUT");
?>		ORIGINAL
 ADD NOISE
MULTIPLICATIVE
<?php
IN="SGwoman.jpg";
$EFFECT="+noise poisson";
$OUT="
SGwomanpoisson.jpg";
exec ("/usr/bin/convert $IN $EFFECT $OUT");
?>		ORIGINAL
 ADD NOISE
POISSON
<?php
IN="SGwoman.jpg";
$EFFECT="+noise random";
$OUT="
SGwomanrandom.jpg";
exec ("/usr/bin/convert $IN $EFFECT $OUT");
?>		ORIGINAL
 ADD NOISE
RANDOM
-threshold percent
<?php
$IN="SGwoman.jpg";
$EFFECT="-threshold 50%";
$OUT="SGwomanth.jpg";
exec ("/usr/bin/convert $IN $EFFECT $OUT");
?>		ORIGINAL
 THRESHOLD
use as written
<?php
$IN="SGwoman.jpg";
$EFFECT="-channel all -random-threshold 0x100%";
$OUT="SGwomanrth.jpg";
exec ("/usr/bin/convert $IN $EFFECT $OUT");
?>		ORIGINAL
 RANDOM THRESHOLD
-channel RGB percent for each as written
<?php
$IN="SGwoman.jpg";
$EFFECT="-channel R -threshold 50% -channel G -threshold 40% -channel B -threshold 50%";
$OUT="SGwomancth.jpg";
exec ("/usr/bin/convert $IN $EFFECT $OUT");
?>		ORIGINAL
 CHANNEL THRESHOLD
-colorspace gray
<?php
$IN="SGfish.jpg";
$EFFECT="-colorspace gray";
$OUT="SGfishgray.jpg";
exec ("/usr/bin/convert $IN $EFFECT $OUT");
?>		ORIGINAL
 COLORSPACE GRAY
-separate -average
<?php
$IN="SGfish.jpg";
$EFFECT="-separate -average";
$OUT="SGfishsep.jpg";
exec ("/usr/bin/convert $IN $EFFECT $OUT");
?>		ORIGINAL
 SEPARATE GRAY
-type GrayScaleMatte
<?php
$IN="SGfish.jpg";
$EFFECT="-type GrayScaleMatte";
$OUT="SGfishgsm.jpg";
exec ("/usr/bin/convert $IN $EFFECT $OUT");
?>		ORIGINAL
 TYPE GRAY
-fx intensity
<?php
$IN="SGfish.jpg";
$EFFECT="-fx intensity";
$OUT="SGfishfx.jpg";
exec ("/usr/bin/convert $IN $EFFECT $OUT");
?>		ORIGINAL
 FX GRAY
-modulate 100,0
<?php
$IN="SGfish.jpg";
$EFFECT="-modulate 100,0";
$OUT="SGfishmod.jpg";
exec ("/usr/bin/convert $IN $EFFECT $OUT");
?>		ORIGINAL
 MODULATE GRAY
PAGE 1


Below are a zip of a sample effects script plus an effects form and a channel threshold form. There is also a text version of the form if you prefer that to the zip.

EFFECTS ZIP

EFFECTS TEXT

CHANNEL THRESHOLD TEXT