Group 4 compression is designed for bilevel images (black and white)

ImageMagick · Jan 18, 2025 · 53fccd7 · 53fccd7
1 parent 8cbd11e
commit 53fccd7
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/coders/tiff.c b/coders/tiff.c
@@ -3267,6 +3267,8 @@ static MagickBooleanType WriteTIFFImage(const ImageInfo *image_info,
               (void) SetImageDepth(image,1);
           }
         image->depth=1;
+        if (image->matte != MagickFalse)
+          compression=UndefinedCompression;
         break;
       }
       case JPEGCompression: