diff --git a/coders/pcx.c b/coders/pcx.c
index f688128..b7d5e80 100644
--- a/coders/pcx.c
+++ b/coders/pcx.c
@@ -1089,9 +1089,6 @@
}
else
{
- Quantum
- polarity;
-
register unsigned char
bit,
byte;
@@ -1099,11 +1096,6 @@
/*
Convert PseudoClass image to a PCX monochrome image.
*/
- polarity=(Quantum) (GetPixelInfoIntensity(
- &image->colormap[0]) < (QuantumRange/2) ? 1 : 0);
- if (image->colors == 2)
- polarity=(Quantum) (GetPixelInfoIntensity(&image->colormap[0]) <
- GetPixelInfoIntensity(&image->colormap[1]) ? 1 : 0);
for (y=0; y < (ssize_t) image->rows; y++)
{
p=GetVirtualPixels(image,0,y,image->columns,1,exception);
@@ -1115,7 +1107,7 @@
for (x=0; x < (ssize_t) image->columns; x++)
{
byte<<=1;
- if (GetPixelIndex(image,p) == polarity)
+ if (GetPixelLuma(image,p) >= (QuantumRange/2.0))
byte|=0x01;
bit++;
if (bit == 8)
diff --git a/tests/validate.h b/tests/validate.h
index 2d67837..890d718 100644
--- a/tests/validate.h
+++ b/tests/validate.h
@@ -102,6 +102,7 @@
"-black-threshold 20%",
"-blur 0x0.5",
"-border 6x6",
+ "-canny 0x1+10%+80%",
"-charcoal 0x1",
"-chop 8x6+20+30",
"-colors 16",