From 7960a4dc4ca1e7f60506871461a747737e0aadc2 Mon Sep 17 00:00:00 2001
From: Oliver Duis <oduis@hotmail.com>
Date: Sat, 30 Jul 2011 12:59:07 +0200
Subject: [PATCH] Fixed RL Deconv sharpening darkens image in special
 situations see issue 868

---
 rtengine/ipsharpen.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rtengine/ipsharpen.cc b/rtengine/ipsharpen.cc
index 7a4d66acb..49568350c 100644
--- a/rtengine/ipsharpen.cc
+++ b/rtengine/ipsharpen.cc
@@ -118,7 +118,7 @@ void ImProcFunctions::deconvsharpening (LabImage* lab, float** b2) {
 #endif
     for (int i=0; i<H; i++)
         for (int j=0; j<W; j++)
-            lab->L[i][j] = lab->L[i][j]*p1 + /*CLIP*/(tmpI[i][j])*p2;
+            lab->L[i][j] = lab->L[i][j]*p1 + MAX(tmpI[i][j],0)*p2;
 
 } // end parallel