From 931ee9562049496e8fd8b32ca8a573461d3ed033 Mon Sep 17 00:00:00 2001
From: Alberto Griggio <agriggio@users.noreply.github.com>
Date: Wed, 17 Jan 2018 23:09:49 +0100
Subject: [PATCH] use a relative height (10% of the full height) instead of an
 absolute one in histogram matching

---
 rtengine/histmatching.cc | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/rtengine/histmatching.cc b/rtengine/histmatching.cc
index 43f73b811..2aea9f3c8 100644
--- a/rtengine/histmatching.cc
+++ b/rtengine/histmatching.cc
@@ -134,14 +134,13 @@ void RawImageSource::getAutoMatchedToneCurve(std::vector<double> &outCurve)
         std::cout << "performing histogram matching for " << getFileName() << " on the embedded thumbnail" << std::endl;
     }
     
-    const int rheight = 200;
     ProcParams neutral;
     std::unique_ptr<IImage8> target;
     { 
         int tr = TR_NONE;
         int fw, fh;
         getFullSize(fw, fh, tr);
-        int skip = fh / rheight;
+        int skip = 10;
         PreviewProps pp(0, 0, fw, fh, skip);
         ColorTemp currWB = getWB();
         std::unique_ptr<Imagefloat> image(new Imagefloat(int(fw / skip), int(fh / skip)));