diff --git a/3rdparty/openexr/IlmImf/ImfAcesFile.cpp b/3rdparty/openexr/IlmImf/ImfAcesFile.cpp
index de4bf83c6..9418b9d2a 100644
--- a/3rdparty/openexr/IlmImf/ImfAcesFile.cpp
+++ b/3rdparty/openexr/IlmImf/ImfAcesFile.cpp
@@ -42,6 +42,7 @@
 #include <ImfRgbaFile.h>
 #include <ImfStandardAttributes.h>
 #include <Iex.h>
+#include <algorithm> // for std::max()
 
 using namespace std;
 using namespace Imath;
diff --git a/3rdparty/openexr/IlmImf/ImfOutputFile.cpp b/3rdparty/openexr/IlmImf/ImfOutputFile.cpp
index 8831ec94d..e69b92bd5 100644
--- a/3rdparty/openexr/IlmImf/ImfOutputFile.cpp
+++ b/3rdparty/openexr/IlmImf/ImfOutputFile.cpp
@@ -58,6 +58,7 @@
 #include <vector>
 #include <fstream>
 #include <assert.h>
+#include <algorithm> // for std::max()
 
 
 namespace Imf {
diff --git a/3rdparty/openexr/IlmImf/ImfScanLineInputFile.cpp b/3rdparty/openexr/IlmImf/ImfScanLineInputFile.cpp
index f7a12a347..5d8b52201 100644
--- a/3rdparty/openexr/IlmImf/ImfScanLineInputFile.cpp
+++ b/3rdparty/openexr/IlmImf/ImfScanLineInputFile.cpp
@@ -56,6 +56,7 @@
 #include <string>
 #include <vector>
 #include <assert.h>
+#include <algorithm> // for std::max()
 
 
 namespace Imf {
diff --git a/3rdparty/openexr/IlmImf/ImfTiledMisc.cpp b/3rdparty/openexr/IlmImf/ImfTiledMisc.cpp
index 57f52f17f..9588e789f 100644
--- a/3rdparty/openexr/IlmImf/ImfTiledMisc.cpp
+++ b/3rdparty/openexr/IlmImf/ImfTiledMisc.cpp
@@ -43,6 +43,7 @@
 #include "Iex.h"
 #include <ImfMisc.h>
 #include <ImfChannelList.h>
+#include <algorithm> // for std::max()
 
 
 namespace Imf {
diff --git a/3rdparty/openexr/IlmImf/ImfTiledOutputFile.cpp b/3rdparty/openexr/IlmImf/ImfTiledOutputFile.cpp
index 08821060d..0bc3cb3c3 100644
--- a/3rdparty/openexr/IlmImf/ImfTiledOutputFile.cpp
+++ b/3rdparty/openexr/IlmImf/ImfTiledOutputFile.cpp
@@ -63,6 +63,7 @@
 #include <fstream>
 #include <assert.h>
 #include <map>
+#include <algorithm> // for std::max()
 
 
 namespace Imf {
diff --git a/3rdparty/openexr/Imath/ImathMatrixAlgo.cpp b/3rdparty/openexr/Imath/ImathMatrixAlgo.cpp
index f0d2ed679..7ddc64968 100644
--- a/3rdparty/openexr/Imath/ImathMatrixAlgo.cpp
+++ b/3rdparty/openexr/Imath/ImathMatrixAlgo.cpp
@@ -44,6 +44,7 @@
 
 #include "ImathMatrixAlgo.h"
 #include <cmath>
+#include <algorithm> // for std::max()
 
 #if defined(OPENEXR_DLL)
     #define EXPORT_CONST __declspec(dllexport)
diff --git a/3rdparty/openexr/fix_msvc2013_errors.patch b/3rdparty/openexr/fix_msvc2013_errors.patch
new file mode 100644
index 000000000..0ce106f13
--- /dev/null
+++ b/3rdparty/openexr/fix_msvc2013_errors.patch
@@ -0,0 +1,72 @@
+diff --git a/3rdparty/openexr/IlmImf/ImfAcesFile.cpp b/3rdparty/openexr/IlmImf/ImfAcesFile.cpp
+index de4bf83..9418b9d 100644
+--- a/3rdparty/openexr/IlmImf/ImfAcesFile.cpp
++++ b/3rdparty/openexr/IlmImf/ImfAcesFile.cpp
+@@ -42,6 +42,7 @@
+ #include <ImfRgbaFile.h>
+ #include <ImfStandardAttributes.h>
+ #include <Iex.h>
++#include <algorithm> // for std::max()
+ 
+ using namespace std;
+ using namespace Imath;
+diff --git a/3rdparty/openexr/IlmImf/ImfOutputFile.cpp b/3rdparty/openexr/IlmImf/ImfOutputFile.cpp
+index 8831ec9..e69b92b 100644
+--- a/3rdparty/openexr/IlmImf/ImfOutputFile.cpp
++++ b/3rdparty/openexr/IlmImf/ImfOutputFile.cpp
+@@ -58,6 +58,7 @@
+ #include <vector>
+ #include <fstream>
+ #include <assert.h>
++#include <algorithm> // for std::max()
+ 
+ 
+ namespace Imf {
+diff --git a/3rdparty/openexr/IlmImf/ImfScanLineInputFile.cpp b/3rdparty/openexr/IlmImf/ImfScanLineInputFile.cpp
+index f7a12a3..5d8b522 100644
+--- a/3rdparty/openexr/IlmImf/ImfScanLineInputFile.cpp
++++ b/3rdparty/openexr/IlmImf/ImfScanLineInputFile.cpp
+@@ -56,6 +56,7 @@
+ #include <string>
+ #include <vector>
+ #include <assert.h>
++#include <algorithm> // for std::max()
+ 
+ 
+ namespace Imf {
+diff --git a/3rdparty/openexr/IlmImf/ImfTiledMisc.cpp b/3rdparty/openexr/IlmImf/ImfTiledMisc.cpp
+index 57f52f1..9588e78 100644
+--- a/3rdparty/openexr/IlmImf/ImfTiledMisc.cpp
++++ b/3rdparty/openexr/IlmImf/ImfTiledMisc.cpp
+@@ -43,6 +43,7 @@
+ #include "Iex.h"
+ #include <ImfMisc.h>
+ #include <ImfChannelList.h>
++#include <algorithm> // for std::max()
+ 
+ 
+ namespace Imf {
+diff --git a/3rdparty/openexr/IlmImf/ImfTiledOutputFile.cpp b/3rdparty/openexr/IlmImf/ImfTiledOutputFile.cpp
+index 0882106..0bc3cb3 100644
+--- a/3rdparty/openexr/IlmImf/ImfTiledOutputFile.cpp
++++ b/3rdparty/openexr/IlmImf/ImfTiledOutputFile.cpp
+@@ -63,6 +63,7 @@
+ #include <fstream>
+ #include <assert.h>
+ #include <map>
++#include <algorithm> // for std::max()
+ 
+ 
+ namespace Imf {
+diff --git a/3rdparty/openexr/Imath/ImathMatrixAlgo.cpp b/3rdparty/openexr/Imath/ImathMatrixAlgo.cpp
+index f0d2ed6..7ddc649 100644
+--- a/3rdparty/openexr/Imath/ImathMatrixAlgo.cpp
++++ b/3rdparty/openexr/Imath/ImathMatrixAlgo.cpp
+@@ -44,6 +44,7 @@
+ 
+ #include "ImathMatrixAlgo.h"
+ #include <cmath>
++#include <algorithm> // for std::max()
+ 
+ #if defined(OPENEXR_DLL)
+     #define EXPORT_CONST __declspec(dllexport)
diff --git a/modules/features2d/src/features2d_init.cpp b/modules/features2d/src/features2d_init.cpp
index 780a67b87..959c1ac9d 100644
--- a/modules/features2d/src/features2d_init.cpp
+++ b/modules/features2d/src/features2d_init.cpp
@@ -176,7 +176,7 @@ CV_INIT_ALGORITHM(DenseFeatureDetector, "Feature2D.Dense",
                   obj.info()->addParam(obj, "varyImgBoundWithScale", obj.varyImgBoundWithScale));
 
 CV_INIT_ALGORITHM(GridAdaptedFeatureDetector, "Feature2D.Grid",
-                  obj.info()->addParam(obj, "detector", obj.detector);
+                  obj.info()->addParam<FeatureDetector>(obj, "detector", obj.detector, false, 0, 0); // Extra params added to avoid VS2013 fatal error in opencv2/core.hpp (decl. of addParam)
                   obj.info()->addParam(obj, "maxTotalKeypoints", obj.maxTotalKeypoints);
                   obj.info()->addParam(obj, "gridRows", obj.gridRows);
                   obj.info()->addParam(obj, "gridCols", obj.gridCols));
diff --git a/modules/features2d/src/orb.cpp b/modules/features2d/src/orb.cpp
index 7ed3ff03c..a6e8ffab3 100644
--- a/modules/features2d/src/orb.cpp
+++ b/modules/features2d/src/orb.cpp
@@ -138,13 +138,16 @@ static void computeOrbDescriptor(const KeyPoint& kpt,
     const uchar* center = &img.at<uchar>(cvRound(kpt.pt.y), cvRound(kpt.pt.x));
     int step = (int)img.step;
 
-#if 1
-    #define GET_VALUE(idx) \
-        center[cvRound(pattern[idx].x*b + pattern[idx].y*a)*step + \
-               cvRound(pattern[idx].x*a - pattern[idx].y*b)]
-#else
     float x, y;
     int ix, iy;
+#if 1
+#define GET_VALUE(idx) \
+       (x = pattern[idx].x*a - pattern[idx].y*b, \
+        y = pattern[idx].x*b + pattern[idx].y*a, \
+        ix = cvRound(x), \
+        iy = cvRound(y), \
+        *(center + iy*step + ix) )
+#else
     #define GET_VALUE(idx) \
         (x = pattern[idx].x*a - pattern[idx].y*b, \
         y = pattern[idx].x*b + pattern[idx].y*a, \