From 3707f7f00a3d5400319d0631e735f2433f231e72 Mon Sep 17 00:00:00 2001
From: Josh Holmer <jholmer.in@gmail.com>
Date: Tue, 16 Jan 2024 22:02:02 -0500
Subject: [PATCH] Fix kernel_radius function for SSIM scaler

The SSIM class does not have a `ref` property, so it throws
a runtime error. The change uses the `scaler` property instead,
which exists.
---
 vsscale/scale.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/vsscale/scale.py b/vsscale/scale.py
index efb6fb3..b17c72a 100644
--- a/vsscale/scale.py
+++ b/vsscale/scale.py
@@ -142,7 +142,7 @@ def _linear_scale(
 
     @inject_self.property
     def kernel_radius(self) -> int:
-        return self.ref.kernel_radius
+        return self.scaler.kernel_radius
 
 
 @dataclass