From 3e58e1e63d48f6d2809d1f7f2432de87d96c85c3 Mon Sep 17 00:00:00 2001
From: Tomas Farago <sensej007@email.cz>
Date: Mon, 15 Jul 2019 08:39:21 +0200
Subject: NLM: add smoothing control parameter *h*

Which is what *sigma* used to do, but in fact it should have been used
to improve weights computation.
---
 docs/filters.rst | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'docs')

diff --git a/docs/filters.rst b/docs/filters.rst
index 530ca67..9d6fed0 100644
--- a/docs/filters.rst
+++ b/docs/filters.rst
@@ -538,9 +538,15 @@ Non-local-means denoising
 
         Radius of patches.
 
+    .. gobj:prop:: h:float
+
+        Smoothing control parameter, should be around noise standard deviation
+        or slightly less. Higher h results in a smoother image but with blurred
+        features.
+
     .. gobj:prop:: sigma:float
 
-        Sigma influencing the Gaussian weighting.
+        Noise standard deviation, improves weights computation.
 
     .. gobj:prop:: addressing-mode:enum
 
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