From 1fbaa48cecc632ce9a6db3f427a382576b0c568f Mon Sep 17 00:00:00 2001
From: huangqinjin <huangqinjin@gmail.com>
Date: Sat, 20 Oct 2018 21:43:39 +0800
Subject: [PATCH] ORB: compute default norm by wta_k

---
 modules/features2d/src/orb.cpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/modules/features2d/src/orb.cpp b/modules/features2d/src/orb.cpp
index e3468af..0a32857 100644
--- a/modules/features2d/src/orb.cpp
+++ b/modules/features2d/src/orb.cpp
@@ -724,7 +724,16 @@ int ORB_Impl::descriptorType() const
 
 int ORB_Impl::defaultNorm() const
 {
-    return NORM_HAMMING;
+    switch (wta_k)
+    {
+    case 2:
+        return NORM_HAMMING;
+    case 3:
+    case 4:
+        return NORM_HAMMING2;
+    default:
+        return -1;
+    }
 }
 
 #ifdef HAVE_OPENCL
-- 
2.7.4