https://github.com/ImageMagick/ImageMagick/issues/5027

ImageMagick · Apr 9, 2022 · 6516558 · 6516558
1 parent ebea37d
commit 6516558
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/coders/pnm.c b/coders/pnm.c
@@ -1965,7 +1965,7 @@ static MagickBooleanType WritePNMImage(const ImageInfo *image_info,Image *image,
           {
             packet_size=1;
             (void) CopyMagickString(type,"GRAYSCALE",MagickPathExtent);
-            if (IdentifyImageMonochrome(image,exception) != MagickFalse)
+            if (GetQuantumRange(image->depth) == 1)
               (void) CopyMagickString(type,"BLACKANDWHITE",MagickPathExtent);
             break;
           }