diff --git a/MagickCore/display.c b/MagickCore/display.c
index 408251c..c924544 100644
--- a/MagickCore/display.c
+++ b/MagickCore/display.c
@@ -3553,7 +3553,8 @@
             if (*fuzz == '\0')
               break;
             (void) ConcatenateMagickString(fuzz,"%",MaxTextExtent);
-            (*image)->fuzz=StringToDoubleInterval(fuzz,(double) QuantumRange+1.0);
+            (*image)->fuzz=StringToDoubleInterval(fuzz,(double) QuantumRange+
+              1.0);
             break;
           }
           case ColorEditUndoCommand:
@@ -8310,7 +8311,7 @@
       */
       XSetCursorState(display,windows,MagickTrue);
       XCheckRefreshWindows(display,windows);
-      threshold=StringToDoubleInterval(factor,QuantumRange);
+      threshold=StringToDoubleInterval(factor,(double) QuantumRange+1.0);
       (void) BilevelImage(*image,threshold,exception);
       XSetCursorState(display,windows,MagickFalse);
       if (windows->image.orphan != MagickFalse)
@@ -8512,7 +8513,7 @@
       */
       XSetCursorState(display,windows,MagickTrue);
       XCheckRefreshWindows(display,windows);
-      threshold=StringToDoubleInterval(factor,QuantumRange);
+      threshold=StringToDoubleInterval(factor,(double) QuantumRange+1.0);
       sepia_image=SepiaToneImage(*image,threshold,exception);
       if (sepia_image != (Image *) NULL)
         {
@@ -8547,7 +8548,7 @@
       */
       XSetCursorState(display,windows,MagickTrue);
       XCheckRefreshWindows(display,windows);
-      threshold=StringToDoubleInterval(factor,QuantumRange);
+      threshold=StringToDoubleInterval(factor,(double) QuantumRange+1.0);
       (void) SolarizeImage(*image,threshold,exception);
       XSetCursorState(display,windows,MagickFalse);
       if (windows->image.orphan != MagickFalse)
@@ -9874,7 +9875,8 @@
             if (*fuzz == '\0')
               break;
             (void) ConcatenateMagickString(fuzz,"%",MaxTextExtent);
-            (*image)->fuzz=StringToDoubleInterval(fuzz,(double) QuantumRange+1.0);
+            (*image)->fuzz=StringToDoubleInterval(fuzz,(double) QuantumRange+
+              1.0);
             break;
           }
           case MatteEditValueCommand: