diff --git a/vsmasktools/edge/_abstract.py b/vsmasktools/edge/_abstract.py
index 9b1a08d..d7b4b29 100644
--- a/vsmasktools/edge/_abstract.py
+++ b/vsmasktools/edge/_abstract.py
@@ -9,7 +9,7 @@
 from vstools import (
     ColorRange, CustomRuntimeError, CustomValueError, FuncExceptT, KwargsT, PlanesT, T, check_variable, core,
     get_lowest_values, get_peak_value, get_peak_values, get_subclasses, inject_self, join, normalize_planes, plane,
-    scale_value, vs
+    scale_mask, vs
 )
 
 from ..exceptions import UnknownEdgeDetectError, UnknownRidgeDetectError
@@ -183,8 +183,8 @@ def _mask(
         peak = get_peak_value(clip)
         hthr = 1.0 if hthr is None else hthr
 
-        lthr = scale_value(lthr, 32, clip, range_out=ColorRange.FULL)
-        hthr = scale_value(hthr, 32, clip, range_out=ColorRange.FULL)
+        lthr = scale_mask(lthr, 32, clip)
+        hthr = scale_mask(hthr, 32, clip)
 
         discard_planes = False
         if isinstance(planes, tuple):
diff --git a/vsmasktools/edge_funcs.py b/vsmasktools/edge_funcs.py
index 707d13d..0d24239 100644
--- a/vsmasktools/edge_funcs.py
+++ b/vsmasktools/edge_funcs.py
@@ -8,7 +8,7 @@
 from vsrgtools.util import wmean_matrix
 from vstools import (
     ColorRange, CustomEnum, VSFunctionAllArgs, check_variable, core, depth, get_peak_value, get_y, iterate, plane,
-    scale_value, vs
+    scale_value, scale_mask, vs
 )
 
 from .details import multi_detail_mask
@@ -41,7 +41,7 @@ def ringing_mask(
     assert check_variable(clip, ringing_mask)
 
     thmi, thma, thlimi, thlima = (
-        scale_value(t, 32, clip, range_out=ColorRange.FULL) for t in [thmi, thma, thlimi, thlima]
+        scale_mask(t, 32, clip, range_out=ColorRange.FULL) for t in [thmi, thma, thlimi, thlima]
     )
 
     edgemask = normalize_mask(credit_mask, plane(clip, 0), **kwargs).std.Limiter()
@@ -83,7 +83,7 @@ def luma_credit_mask(
 
     edge_mask = normalize_mask(edgemask, y, **kwargs)
 
-    credit_mask = norm_expr([edge_mask, y], f'y {scale_value(thr, 32, y, range_out=ColorRange.FULL)} > y 0 ? x min')
+    credit_mask = norm_expr([edge_mask, y], f'y {scale_mask(thr, 32, y)} > y 0 ? x min')
 
     if not draft:
         credit_mask = Morpho.maximum(credit_mask, iterations=4)
diff --git a/vsmasktools/hardsub.py b/vsmasktools/hardsub.py
index 4aad9e6..1904345 100644
--- a/vsmasktools/hardsub.py
+++ b/vsmasktools/hardsub.py
@@ -13,7 +13,7 @@
     ColorRange, CustomOverflowError, FileNotExistsError, FilePathType, FrameRangeN, FrameRangesN,
     Matrix, VSFunction, check_variable, core, depth, fallback, get_lowest_value, get_neutral_value,
     get_neutral_values, get_peak_value, get_y, iterate, normalize_ranges, replace_ranges,
-    scale_value, vs, vs_object
+    scale_value, scale_delta, vs, vs_object
 )
 
 from .abstract import DeferredMask, GeneralMask
@@ -131,7 +131,7 @@ def get_progressive_dehardsub(
 
         assert masks[-1].format is not None
 
-        thr = scale_value(self.bin_thr, 32, masks[-1], range_out=ColorRange.FULL)
+        thr = scale_value(self.bin_thr, 32, masks[-1])
 
         for p in partials:
             masks.append(
@@ -180,7 +180,7 @@ def _mask(self, clip: vs.VideoNode, ref: vs.VideoNode, **kwargs: Any) -> vs.Vide
             for x in (clip, ref)
         )
 
-        highpass = scale_value(self.highpass, 32, clip)
+        highpass = scale_delta(self.highpass, 32, clip)
 
         mask = norm_expr(
             [clipedge, refedge], f'x y - {highpass} < 0 {ExprToken.RangeMax} ?'