Merge remote-tracking branch 'upstream/3.4' into merge-3.4

3rdparty/libjasper/jasper/jas_config.h

@@ -17,6 +17,12 @@
 #if !defined(JAS_WIN_MSVC_BUILD)
 /* A configure-based build is being used. */
 
+#include <stdio.h>
+
+// uClibc-ng workaround: https://github.com/opencv/opencv/pull/15279
+#ifndef L_tmpnam
+#define L_tmpnam 20
+#endif
 
 
 /* Extra debugging support */

3rdparty/libpng/CMakeLists.txt

@@ -47,7 +47,9 @@ if(";${CPU_BASELINE_FINAL};" MATCHES "SSE2"
 endif()
 
 if(PPC64LE OR PPC64)
-  if(ENABLE_VSX AND NOT PPC64)
+  # VSX3 features are backwards compatible
+  if(";${CPU_BASELINE_FINAL};" MATCHES "VSX.*"
+      AND NOT PPC64)
     list(APPEND lib_srcs powerpc/powerpc_init.c powerpc/filter_vsx_intrinsics.c)
     add_definitions(-DPNG_POWERPC_VSX_OPT=2)
   else()

CMakeLists.txt

@@ -64,6 +64,10 @@ if(POLICY CMP0068)
   cmake_policy(SET CMP0068 NEW)  # CMake 3.9+: `RPATH` settings on macOS do not affect `install_name`.
 endif()
 
+if(POLICY CMP0075)
+  cmake_policy(SET CMP0075 NEW)  # CMake 3.12+: Include file check macros honor `CMAKE_REQUIRED_LIBRARIES`
+endif()
+
 
 #
 # Configure OpenCV CMake hooks
@@ -1502,19 +1506,22 @@ endif()
 
 if(WITH_INF_ENGINE OR INF_ENGINE_TARGET)
   if(INF_ENGINE_TARGET)
+    list(GET INF_ENGINE_TARGET 0 ie_target)
     set(__msg "YES (${INF_ENGINE_RELEASE} / ${INF_ENGINE_VERSION})")
-    get_target_property(_lib ${INF_ENGINE_TARGET} IMPORTED_LOCATION)
-    get_target_property(_lib_imp_rel ${INF_ENGINE_TARGET} IMPORTED_IMPLIB_RELEASE)
-    get_target_property(_lib_imp_dbg ${INF_ENGINE_TARGET} IMPORTED_IMPLIB_DEBUG)
-    get_target_property(_lib_rel ${INF_ENGINE_TARGET} IMPORTED_LOCATION_RELEASE)
-    get_target_property(_lib_dbg ${INF_ENGINE_TARGET} IMPORTED_LOCATION_DEBUG)
+    get_target_property(_lib ${ie_target} IMPORTED_LOCATION)
+    get_target_property(_lib_imp_rel ${ie_target} IMPORTED_IMPLIB_RELEASE)
+    get_target_property(_lib_imp_dbg ${ie_target} IMPORTED_IMPLIB_DEBUG)
+    get_target_property(_lib_rel ${ie_target} IMPORTED_LOCATION_RELEASE)
+    get_target_property(_lib_dbg ${ie_target} IMPORTED_LOCATION_DEBUG)
     ocv_build_features_string(_lib
       IF _lib THEN "${_lib}"
       IF _lib_imp_rel AND _lib_imp_dbg THEN "${_lib_imp_rel} / ${_lib_imp_dbg}"
       IF _lib_rel AND _lib_dbg THEN "${_lib_rel} / ${_lib_dbg}"
+      IF _lib_rel  THEN "${_lib_rel}"
+      IF _lib_dbg  THEN "${_lib_dbg}"
       ELSE "unknown"
     )
-    get_target_property(_inc ${INF_ENGINE_TARGET} INTERFACE_INCLUDE_DIRECTORIES)
+    get_target_property(_inc ${ie_target} INTERFACE_INCLUDE_DIRECTORIES)
     status("    Inference Engine:" "${__msg}")
     status("                libs:" "${_lib}")
     status("            includes:" "${_inc}")

cmake/OpenCVDetectCXXCompiler.cmake

@@ -191,6 +191,25 @@ if(NOT HAVE_CXX11)
     endif()
   endif()
 endif()
+
 if(NOT HAVE_CXX11)
   message(FATAL_ERROR "OpenCV 4.x requires C++11")
 endif()
+
+if((HAVE_CXX11
+        AND NOT MSVC
+        AND NOT (X86 OR X86_64)
+    AND NOT OPENCV_SKIP_LIBATOMIC_COMPILER_CHECK)
+    OR OPENCV_FORCE_LIBATOMIC_COMPILER_CHECK
+)
+  ocv_check_compiler_flag(CXX "" HAVE_CXX_ATOMICS_WITHOUT_LIB "${OpenCV_SOURCE_DIR}/cmake/checks/atomic_check.cpp")
+  if(NOT HAVE_CXX_ATOMICS_WITHOUT_LIB)
+    list(APPEND CMAKE_REQUIRED_LIBRARIES atomic)
+    ocv_check_compiler_flag(CXX "" HAVE_CXX_ATOMICS_WITH_LIB "${OpenCV_SOURCE_DIR}/cmake/checks/atomic_check.cpp")
+    if(HAVE_CXX_ATOMICS_WITH_LIB)
+      list(APPEND OPENCV_LINKER_LIBS atomic)
+    else()
+      message(FATAL_ERROR "C++11 compiler must support std::atomic")
+    endif()
+  endif()
+endif()

cmake/OpenCVDetectInferenceEngine.cmake

@@ -45,7 +45,7 @@ endfunction()
 
 find_package(InferenceEngine QUIET)
 if(InferenceEngine_FOUND)
-  set(INF_ENGINE_TARGET IE::inference_engine)
+  set(INF_ENGINE_TARGET ${InferenceEngine_LIBRARIES})
   set(INF_ENGINE_VERSION "${InferenceEngine_VERSION}" CACHE STRING "")
   message(STATUS "Detected InferenceEngine: cmake package")
 endif()

cmake/OpenCVUtils.cmake

@@ -415,12 +415,34 @@ MACRO(ocv_check_compiler_flag LANG FLAG RESULT)
       else()
         set(__msg "")
       endif()
+      if(CMAKE_REQUIRED_LIBRARIES)
+        set(__link_libs LINK_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
+      else()
+        set(__link_libs)
+      endif()
+      set(__cmake_flags "")
+      if(CMAKE_EXE_LINKER_FLAGS)  # CMP0056 do this on new CMake
+        list(APPEND __cmake_flags "-DCMAKE_EXE_LINKER_FLAGS=${CMAKE_EXE_LINKER_FLAGS}")
+      endif()
+
+      # CMP0067 do this on new CMake
+      if(DEFINED CMAKE_CXX_STANDARD)
+        list(APPEND __cmake_flags "-DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}")
+      endif()
+      if(DEFINED CMAKE_CXX_STANDARD_REQUIRED)
+        list(APPEND __cmake_flags "-DCMAKE_CXX_STANDARD_REQUIRED=${CMAKE_CXX_STANDARD_REQUIRED}")
+      endif()
+      if(DEFINED CMAKE_CXX_EXTENSIONS)
+        list(APPEND __cmake_flags "-DCMAKE_CXX_EXTENSIONS=${CMAKE_CXX_EXTENSIONS}")
+      endif()
+
       MESSAGE(STATUS "Performing Test ${RESULT}${__msg}")
       TRY_COMPILE(${RESULT}
         "${CMAKE_BINARY_DIR}"
         "${_fname}"
-        CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS=${CMAKE_EXE_LINKER_FLAGS}"   # CMP0056 do this on new CMake
+        CMAKE_FLAGS ${__cmake_flags}
         COMPILE_DEFINITIONS "${FLAG}"
+        ${__link_libs}
         OUTPUT_VARIABLE OUTPUT)
 
       if(${RESULT})

cmake/checks/atomic_check.cpp

@@ -0,0 +1,12 @@
+#include <atomic>
+
+static int test()
+{
+    std::atomic<int> x;
+    return x;
+}
+
+int main()
+{
+    return test();
+}

doc/py_tutorials/py_core/py_optimization/py_optimization.markdown

@@ -40,7 +40,7 @@ goal):
 img1 = cv.imread('messi5.jpg')
 
 e1 = cv.getTickCount()
-for i in xrange(5,49,2):
+for i in range(5,49,2):
     img1 = cv.medianBlur(img1,i)
 e2 = cv.getTickCount()
 t = (e2 - e1)/cv.getTickFrequency()

doc/py_tutorials/py_feature2d/py_matcher/py_matcher.markdown

@@ -38,13 +38,13 @@ best matches. There is also **cv.drawMatchesKnn** which draws all the k best mat
 will draw two match-lines for each keypoint. So we have to pass a mask if we want to selectively
 draw it.
 
-Let's see one example for each of SURF and ORB (Both use different distance measurements).
+Let's see one example for each of SIFT and ORB (Both use different distance measurements).
 
 ### Brute-Force Matching with ORB Descriptors
 
 Here, we will see a simple example on how to match features between two images. In this case, I have
 a queryImage and a trainImage. We will try to find the queryImage in trainImage using feature
-matching. ( The images are /samples/c/box.png and /samples/c/box_in_scene.png)
+matching. ( The images are /samples/data/box.png and /samples/data/box_in_scene.png)
 
 We are using ORB descriptors to match features. So let's start with loading images, finding
 descriptors etc.

doc/tutorials/stitching/stitcher/stitcher.markdown

@@ -15,7 +15,7 @@ Code
 ----
 
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/samples/cpp/stitching.cpp).
+[here](https://github.com/opencv/opencv/tree/master/samples/cpp/stitching.cpp).
 
 @include samples/cpp/stitching.cpp
 

modules/core/include/opencv2/core/fast_math.hpp

@@ -47,12 +47,6 @@
 
 #include "opencv2/core/cvdef.h"
 
-#if ((defined _MSC_VER && defined _M_X64) || (defined __GNUC__ && defined __x86_64__ \
-    && defined __SSE2__ && !defined __APPLE__)) && !defined(__CUDACC__)
-#include <emmintrin.h>
-#endif
-
-
 //! @addtogroup core_utils
 //! @{
 
@@ -70,14 +64,24 @@
 #  endif
 #endif
 
-#if defined __PPC64__ && defined __GNUC__ && defined _ARCH_PWR8 && !defined (__CUDACC__)
-#  include <altivec.h>
-#endif
-
-#if defined(CV_INLINE_ROUND_FLT)
+#if defined(__CUDACC__)
+  // nothing, intrinsics/asm code is not supported
+#else
+  #if ((defined _MSC_VER && defined _M_X64) \
+      || (defined __GNUC__ && defined __x86_64__ && defined __SSE2__)) \
+      && !defined(OPENCV_SKIP_INCLUDE_EMMINTRIN_H)
+    #include <emmintrin.h>
+  #endif
+
+  #if defined __PPC64__ && defined __GNUC__ && defined _ARCH_PWR8 \
+      && !defined(OPENCV_SKIP_INCLUDE_ALTIVEC_H)
+    #include <altivec.h>
+  #endif
+
+  #if defined(CV_INLINE_ROUND_FLT)
     // user-specified version
     // CV_INLINE_ROUND_DBL should be defined too
-#elif defined __GNUC__ && defined __arm__ && (defined __ARM_PCS_VFP || defined __ARM_VFPV3__ || defined __ARM_NEON__) && !defined __SOFTFP__ && !defined(__CUDACC__)
+  #elif defined __GNUC__ && defined __arm__ && (defined __ARM_PCS_VFP || defined __ARM_VFPV3__ || defined __ARM_NEON__) && !defined __SOFTFP__
     // 1. general scheme
     #define ARM_ROUND(_value, _asm_string) \
         int res; \
@@ -93,7 +97,7 @@
     #endif
     // 3. version for float
     #define CV_INLINE_ROUND_FLT(value) ARM_ROUND(value, "vcvtr.s32.f32 %[temp], %[value]\n vmov %[res], %[temp]")
-#elif defined __PPC64__ && defined __GNUC__ && defined _ARCH_PWR8 && !defined (__CUDACC__)
+  #elif defined __PPC64__ && defined __GNUC__ && defined _ARCH_PWR8
     // P8 and newer machines can convert fp32/64 to int quickly.
     #define CV_INLINE_ROUND_DBL(value) \
         int out; \
@@ -103,40 +107,86 @@
 
     // FP32 also works with FP64 routine above
     #define CV_INLINE_ROUND_FLT(value) CV_INLINE_ROUND_DBL(value)
+  #endif
 
-    #ifdef _ARCH_PWR9
-        #define CV_INLINE_ISINF_DBL(value) return scalar_test_data_class(value, 0x30);
-        #define CV_INLINE_ISNAN_DBL(value) return scalar_test_data_class(value, 0x40);
-        #define CV_INLINE_ISINF_FLT(value) CV_INLINE_ISINF_DBL(value)
-        #define CV_INLINE_ISNAN_FLT(value) CV_INLINE_ISNAN_DBL(value)
-    #endif
-#elif defined CV_ICC || defined __GNUC__
-    #define CV_INLINE_ROUND_DBL(value) return (int)(lrint(value));
-    #define CV_INLINE_ROUND_FLT(value) return (int)(lrintf(value));
-#endif
-
-#if defined __PPC64__ && !defined OPENCV_USE_FASTMATH_GCC_BUILTINS
-    /* Let GCC inline C math functions when available. Dedicated hardware is available to
-       round and covert FP values. */
-    #define OPENCV_USE_FASTMATH_GCC_BUILTINS
-#endif
-
-/* Enable GCC builtin math functions if possible, desired, and available.
-   Note, not all math functions inline equally. E.g lrint will not inline
-   without the -fno-math-errno option. */
-#if defined OPENCV_USE_FASTMATH_GCC_BUILTINS && defined __GNUC__ && !defined __clang__ && !defined (__CUDACC__)
-    #define _OPENCV_FASTMATH_ENABLE_GCC_MATH_BUILTINS
-#endif
+  #ifdef CV_INLINE_ISINF_FLT
+    // user-specified version
+    // CV_INLINE_ISINF_DBL should be defined too
+  #elif defined __PPC64__ && defined _ARCH_PWR9 && defined(scalar_test_data_class)
+    #define CV_INLINE_ISINF_DBL(value) return scalar_test_data_class(value, 0x30);
+    #define CV_INLINE_ISINF_FLT(value) CV_INLINE_ISINF_DBL(value)
+  #endif
 
-/* Allow overrides for some functions which may benefit from tuning. Likewise,
-   note that isinf is not used as the return value is signed. */
-#if defined _OPENCV_FASTMATH_ENABLE_GCC_MATH_BUILTINS && !defined CV_INLINE_ISNAN_DBL
-    #define CV_INLINE_ISNAN_DBL(value) return __builtin_isnan(value);
-#endif
+  #ifdef CV_INLINE_ISNAN_FLT
+    // user-specified version
+    // CV_INLINE_ISNAN_DBL should be defined too
+  #elif defined __PPC64__ && defined _ARCH_PWR9 && defined(scalar_test_data_class)
+    #define CV_INLINE_ISNAN_DBL(value) return scalar_test_data_class(value, 0x40);
+    #define CV_INLINE_ISNAN_FLT(value) CV_INLINE_ISNAN_DBL(value)
+  #endif
+
+  #if !defined(OPENCV_USE_FASTMATH_BUILTINS) \
+    && ( \
+        defined(__x86_64__) || defined(__i686__) \
+        || defined(__arm__) \
+        || defined(__PPC64__) \
+    )
+    /* Let builtin C math functions when available. Dedicated hardware is available to
+       round and convert FP values. */
+    #define OPENCV_USE_FASTMATH_BUILTINS 1
+  #endif
+
+  /* Enable builtin math functions if possible, desired, and available.
+     Note, not all math functions inline equally. E.g lrint will not inline
+     without the -fno-math-errno option. */
+  #if defined(CV_ICC)
+    // nothing
+  #elif defined(OPENCV_USE_FASTMATH_BUILTINS) && OPENCV_USE_FASTMATH_BUILTINS
+    #if defined(__clang__)
+      #define CV__FASTMATH_ENABLE_CLANG_MATH_BUILTINS
+      #if !defined(CV_INLINE_ISNAN_DBL) && __has_builtin(__builtin_isnan)
+        #define CV_INLINE_ISNAN_DBL(value) return __builtin_isnan(value);
+      #endif
+      #if !defined(CV_INLINE_ISNAN_FLT) && __has_builtin(__builtin_isnan)
+        #define CV_INLINE_ISNAN_FLT(value) return __builtin_isnan(value);
+      #endif
+      #if !defined(CV_INLINE_ISINF_DBL) && __has_builtin(__builtin_isinf)
+        #define CV_INLINE_ISINF_DBL(value) return __builtin_isinf(value);
+      #endif
+      #if !defined(CV_INLINE_ISINF_FLT) && __has_builtin(__builtin_isinf)
+        #define CV_INLINE_ISINF_FLT(value) return __builtin_isinf(value);
+      #endif
+    #elif defined(__GNUC__)
+      #define CV__FASTMATH_ENABLE_GCC_MATH_BUILTINS
+      #if !defined(CV_INLINE_ISNAN_DBL)
+        #define CV_INLINE_ISNAN_DBL(value) return __builtin_isnan(value);
+      #endif
+      #if !defined(CV_INLINE_ISNAN_FLT)
+        #define CV_INLINE_ISNAN_FLT(value) return __builtin_isnanf(value);
+      #endif
+      #if !defined(CV_INLINE_ISINF_DBL)
+        #define CV_INLINE_ISINF_DBL(value) return __builtin_isinf(value);
+      #endif
+      #if !defined(CV_INLINE_ISINF_FLT)
+        #define CV_INLINE_ISINF_FLT(value) return __builtin_isinff(value);
+      #endif
+    #elif defined(_MSC_VER)
+      #if !defined(CV_INLINE_ISNAN_DBL)
+        #define CV_INLINE_ISNAN_DBL(value) return isnan(value);
+      #endif
+      #if !defined(CV_INLINE_ISNAN_FLT)
+        #define CV_INLINE_ISNAN_FLT(value) return isnan(value);
+      #endif
+      #if !defined(CV_INLINE_ISINF_DBL)
+        #define CV_INLINE_ISINF_DBL(value) return isinf(value);
+      #endif
+      #if !defined(CV_INLINE_ISINF_FLT)
+        #define CV_INLINE_ISINF_FLT(value) return isinf(value);
+      #endif
+    #endif
+  #endif
 
-#if defined _OPENCV_FASTMATH_ENABLE_GCC_MATH_BUILTINS && !defined CV_INLINE_ISNAN_FLT
-    #define CV_INLINE_ISNAN_FLT(value) return __builtin_isnanf(value);
-#endif
+#endif // defined(__CUDACC__)
 
 /** @brief Rounds floating-point number to the nearest integer
 
@@ -146,8 +196,11 @@
 CV_INLINE int
 cvRound( double value )
 {
-#if ((defined _MSC_VER && defined _M_X64) || (defined __GNUC__ && defined __x86_64__ \
-    && defined __SSE2__ && !defined __APPLE__) || CV_SSE2) && !defined(__CUDACC__)
+#if defined CV_INLINE_ROUND_DBL
+    CV_INLINE_ROUND_DBL(value);
+#elif ((defined _MSC_VER && defined _M_X64) || (defined __GNUC__ && defined __x86_64__ \
+    && defined __SSE2__ && !defined __APPLE__) || CV_SSE2) \
+    && !defined(__CUDACC__)
     __m128d t = _mm_set_sd( value );
     return _mm_cvtsd_si32(t);
 #elif defined _MSC_VER && defined _M_IX86
@@ -158,10 +211,8 @@ cvRound( double value )
         fistp t;
     }
     return t;
-#elif defined CV_INLINE_ROUND_DBL
-    CV_INLINE_ROUND_DBL(value);
 #elif defined CV_ICC || defined __GNUC__
-    return (int)lrint(value);
+    return (int)(lrint(value));
 #else
     /* it's ok if round does not comply with IEEE754 standard;
        the tests should allow +/-1 difference when the tested functions use round */
@@ -179,7 +230,10 @@ cvRound( double value )
  */
 CV_INLINE int cvFloor( double value )
 {
-#if defined _OPENCV_FASTMATH_ENABLE_GCC_MATH_BUILTINS
+#if (defined CV__FASTMATH_ENABLE_GCC_MATH_BUILTINS || defined CV__FASTMATH_ENABLE_CLANG_MATH_BUILTINS) \
+    && ( \
+        defined(__PPC64__) \
+    )
     return __builtin_floor(value);
 #else
     int i = (int)value;
@@ -196,7 +250,10 @@ CV_INLINE int cvFloor( double value )
  */
 CV_INLINE int cvCeil( double value )
 {
-#if defined _OPENCV_FASTMATH_ENABLE_GCC_MATH_BUILTINS
+#if (defined CV__FASTMATH_ENABLE_GCC_MATH_BUILTINS || defined CV__FASTMATH_ENABLE_CLANG_MATH_BUILTINS) \
+    && ( \
+        defined(__PPC64__) \
+    )
     return __builtin_ceil(value);
 #else
     int i = (int)value;
@@ -232,6 +289,11 @@ CV_INLINE int cvIsInf( double value )
 {
 #if defined CV_INLINE_ISINF_DBL
     CV_INLINE_ISINF_DBL(value);
+#elif defined(__x86_64__) || defined(_M_X64) || defined(__aarch64__) || defined(__PPC64__)
+    Cv64suf ieee754;
+    ieee754.f = value;
+    return (ieee754.u & 0x7fffffff00000000) ==
+                        0x7ff0000000000000;
 #else
     Cv64suf ieee754;
     ieee754.f = value;
@@ -245,8 +307,11 @@ CV_INLINE int cvIsInf( double value )
 /** @overload */
 CV_INLINE int cvRound(float value)
 {
-#if ((defined _MSC_VER && defined _M_X64) || (defined __GNUC__ && defined __x86_64__ \
-    && defined __SSE2__ && !defined __APPLE__) || CV_SSE2) && !defined(__CUDACC__)
+#if defined CV_INLINE_ROUND_FLT
+    CV_INLINE_ROUND_FLT(value);
+#elif ((defined _MSC_VER && defined _M_X64) || (defined __GNUC__ && defined __x86_64__ \
+    && defined __SSE2__ && !defined __APPLE__) || CV_SSE2) \
+    && !defined(__CUDACC__)
     __m128 t = _mm_set_ss( value );
     return _mm_cvtss_si32(t);
 #elif defined _MSC_VER && defined _M_IX86
@@ -257,10 +322,8 @@ CV_INLINE int cvRound(float value)
         fistp t;
     }
     return t;
-#elif defined CV_INLINE_ROUND_FLT
-    CV_INLINE_ROUND_FLT(value);
 #elif defined CV_ICC || defined __GNUC__
-    return (int)lrintf(value);
+    return (int)(lrintf(value));
 #else
     /* it's ok if round does not comply with IEEE754 standard;
      the tests should allow +/-1 difference when the tested functions use round */
@@ -277,7 +340,10 @@ CV_INLINE int cvRound( int value )
 /** @overload */
 CV_INLINE int cvFloor( float value )
 {
-#if defined _OPENCV_FASTMATH_ENABLE_GCC_MATH_BUILTINS
+#if (defined CV__FASTMATH_ENABLE_GCC_MATH_BUILTINS || defined CV__FASTMATH_ENABLE_CLANG_MATH_BUILTINS) \
+    && ( \
+        defined(__PPC64__) \
+    )
     return __builtin_floorf(value);
 #else
     int i = (int)value;
@@ -294,7 +360,10 @@ CV_INLINE int cvFloor( int value )
 /** @overload */
 CV_INLINE int cvCeil( float value )
 {
-#if defined _OPENCV_FASTMATH_ENABLE_GCC_MATH_BUILTINS
+#if (defined CV__FASTMATH_ENABLE_GCC_MATH_BUILTINS || defined CV__FASTMATH_ENABLE_CLANG_MATH_BUILTINS) \
+    && ( \
+        defined(__PPC64__) \
+    )
     return __builtin_ceilf(value);
 #else
     int i = (int)value;

modules/core/include/opencv2/core/mat.inl.hpp

@@ -1699,6 +1699,11 @@ Mat_<_Tp>::Mat_(const std::array<_Tp, _Nm>& arr, bool copyData)
 template<typename _Tp> inline
 Mat_<_Tp>& Mat_<_Tp>::operator = (const Mat& m)
 {
+    if (m.empty())
+    {
+        release();
+        return *this;
+    }
     if( traits::Type<_Tp>::value == m.type() )
     {
         Mat::operator = (m);
@@ -1764,7 +1769,7 @@ Mat_<_Tp> Mat_<_Tp>::cross(const Mat_& m) const
 template<typename _Tp> template<typename T2> inline
 Mat_<_Tp>::operator Mat_<T2>() const
 {
-    return Mat_<T2>(*this);
+    return Mat_<T2>(static_cast<const Mat&>(*this));
 }
 
 template<typename _Tp> inline
@@ -2054,7 +2059,7 @@ void Mat_<_Tp>::forEach(const Functor& operation) const {
 
 template<typename _Tp> inline
 Mat_<_Tp>::Mat_(Mat_&& m)
-    : Mat(m)
+    : Mat(std::move(m))
 {
 }
 
@@ -2070,12 +2075,17 @@ Mat_<_Tp>::Mat_(Mat&& m)
     : Mat()
 {
     flags = (flags & ~CV_MAT_TYPE_MASK) + traits::Type<_Tp>::value;
-    *this = m;
+    *this = std::move(m);
 }
 
 template<typename _Tp> inline
 Mat_<_Tp>& Mat_<_Tp>::operator = (Mat&& m)
 {
+    if (m.empty())
+    {
+        release();
+        return *this;
+    }
     if( traits::Type<_Tp>::value == m.type() )
     {
         Mat::operator = ((Mat&&)m);

modules/core/src/stat.simd.hpp

@@ -110,7 +110,7 @@ int normHamming(const uchar* a, const uchar* b, int n)
     {
         v_uint64x2 t = v_setzero_u64();
         for(; i <= n - v_uint8x16::nlanes; i += v_uint8x16::nlanes)
-            t += v_popcount(v_reinterpret_as_u64(vx_load(a + i) ^ vx_load(b + i)));
+            t += v_popcount(v_reinterpret_as_u64(v_load(a + i) ^ v_load(b + i)));
         result += (int)v_reduce_sum(t);
     }
 #endif

modules/dnn/src/tensorflow/tf_importer.cpp

@@ -1129,15 +1129,14 @@ void TFImporter::populateNet(Net dstNet)
             if (value_id.find(layer.input(1)) != value_id.end())
             {
                 Mat newShape = getTensorContent(getConstBlob(layer, value_id, 1));
-
+                if (newShape.total() == 4)
+                {
+                    // NHWC->NCHW
+                    std::swap(*newShape.ptr<int32_t>(0, 2), *newShape.ptr<int32_t>(0, 3));
+                    std::swap(*newShape.ptr<int32_t>(0, 1), *newShape.ptr<int32_t>(0, 2));
+                }
                 if (inpLayout == DATA_LAYOUT_NHWC)
                 {
-                    if (newShape.total() == 4)
-                    {
-                        // NHWC->NCHW
-                        std::swap(*newShape.ptr<int32_t>(0, 2), *newShape.ptr<int32_t>(0, 3));
-                        std::swap(*newShape.ptr<int32_t>(0, 1), *newShape.ptr<int32_t>(0, 2));
-                    }
                     if (newShape.total() != 4 || newShape.at<int>(1) == 1)
                     {
                         LayerParams permLP;

modules/dnn/test/test_tf_importer.cpp

@@ -279,7 +279,7 @@ TEST_P(Test_TensorFlow_layers, matmul)
     // Reference output values are in range [-5.688, 4.484]
     double l1 = target == DNN_TARGET_MYRIAD ? 6.1e-3 : default_l1;
     runTensorFlowNet("nhwc_reshape_matmul", false, l1);
-
+    runTensorFlowNet("matmul_layout");
 }
 
 TEST_P(Test_TensorFlow_layers, reshape)

modules/imgproc/src/corner.avx.cpp

@@ -113,9 +113,9 @@ static void store_interleave(float* ptr, const __m256& a, const __m256& b, const
     v_pack4x3to3x4(u0.val, u1.val, u2.val, u3.val, a1, b1, c1);
 
 #if !defined(__GNUC__) || defined(__INTEL_COMPILER)
-    _mm256_storeu_ps(ptr, _mm256_setr_m128(_mm_castsi128_ps(a0), _mm_castsi128_ps(b0)));
-    _mm256_storeu_ps(ptr + 8, _mm256_setr_m128(_mm_castsi128_ps(c0), _mm_castsi128_ps(a1)));
-    _mm256_storeu_ps(ptr + 16,  _mm256_setr_m128(_mm_castsi128_ps(b1), _mm_castsi128_ps(c1)));
+    _mm256_storeu_ps(ptr,      _mm256_castsi256_ps(_mm256_setr_m128i(a0, b0)));
+    _mm256_storeu_ps(ptr + 8,  _mm256_castsi256_ps(_mm256_setr_m128i(c0, a1)));
+    _mm256_storeu_ps(ptr + 16, _mm256_castsi256_ps(_mm256_setr_m128i(b1, c1)));
 #else
     // GCC: workaround for missing AVX intrinsic: "_mm256_setr_m128()"
     _mm256_storeu_ps(ptr, _mm256_insertf128_ps(_mm256_castps128_ps256(_mm_castsi128_ps(a0)), _mm_castsi128_ps(b0), 1));

modules/objdetect/src/hog.cpp

@@ -66,6 +66,7 @@ namespace cv
 
 static int numPartsWithin(int size, int part_size, int stride)
 {
+    CV_Assert(stride != 0);
     return (size - part_size + stride) / stride;
 }
 
@@ -78,13 +79,17 @@ static Size numPartsWithin(cv::Size size, cv::Size part_size,
 
 static size_t getBlockHistogramSize(Size block_size, Size cell_size, int nbins)
 {
+    CV_Assert(!cell_size.empty());
     Size cells_per_block = Size(block_size.width / cell_size.width,
-        block_size.height / cell_size.height);
+                                block_size.height / cell_size.height);
     return (size_t)(nbins * cells_per_block.area());
 }
 
 size_t HOGDescriptor::getDescriptorSize() const
 {
+    CV_Assert(!cellSize.empty());
+    CV_Assert(!blockStride.empty());
+
     CV_Assert(blockSize.width % cellSize.width == 0 &&
         blockSize.height % cellSize.height == 0);
     CV_Assert((winSize.width - blockSize.width) % blockStride.width == 0 &&
@@ -142,20 +147,20 @@ bool HOGDescriptor::read(FileNode& obj)
     if( !obj.isMap() )
         return false;
     FileNodeIterator it = obj["winSize"].begin();
-    it >> winSize.width >> winSize.height;
+    it >> winSize.width >> winSize.height; CV_Assert(!winSize.empty());
     it = obj["blockSize"].begin();
-    it >> blockSize.width >> blockSize.height;
+    it >> blockSize.width >> blockSize.height; CV_Assert(!blockSize.empty());
     it = obj["blockStride"].begin();
-    it >> blockStride.width >> blockStride.height;
+    it >> blockStride.width >> blockStride.height; CV_Assert(!blockStride.empty());
     it = obj["cellSize"].begin();
-    it >> cellSize.width >> cellSize.height;
-    obj["nbins"] >> nbins;
+    it >> cellSize.width >> cellSize.height; CV_Assert(!cellSize.empty());
+    obj["nbins"] >> nbins; CV_Assert(nbins > 0);
     obj["derivAperture"] >> derivAperture;
     obj["winSigma"] >> winSigma;
     obj["histogramNormType"] >> histogramNormType;
     obj["L2HysThreshold"] >> L2HysThreshold;
     obj["gammaCorrection"] >> gammaCorrection;
-    obj["nlevels"] >> nlevels;
+    obj["nlevels"] >> nlevels; CV_Assert(nlevels > 0);
     if (obj["signedGradient"].empty())
         signedGradient = false;
     else

modules/photo/src/seamless_cloning.cpp

@@ -78,6 +78,7 @@ void cv::seamlessClone(InputArray _src, InputArray _dst, InputArray _mask, Point
     copyMakeBorder(mask_inner, mask, 1, 1, 1, 1, BORDER_ISOLATED | BORDER_CONSTANT, Scalar(0));
 
     Rect roi_s = boundingRect(mask);
+    if (roi_s.empty()) return;
     Rect roi_d(p.x - roi_s.width / 2, p.y - roi_s.height / 2, roi_s.width, roi_s.height);
 
     Mat destinationROI = dest(roi_d).clone();

modules/photo/test/test_cloning.cpp

@@ -86,6 +86,15 @@ TEST(Photo_SeamlessClone_normal, regression)
     EXPECT_LE(errorINF, 1);
     double errorL1 = cvtest::norm(reference, result, NORM_L1);
     EXPECT_LE(errorL1, reference.total() * numerical_precision) << "size=" << reference.size();
+
+    mask = Scalar(0, 0, 0);
+    seamlessClone(source, destination, mask, p, result, 1);
+
+    reference = destination;
+    errorINF = cvtest::norm(reference, result, NORM_INF);
+    EXPECT_LE(errorINF, 1);
+    errorL1 = cvtest::norm(reference, result, NORM_L1);
+    EXPECT_LE(errorL1, reference.total() * numerical_precision) << "size=" << reference.size();
 }
 
 TEST(Photo_SeamlessClone_mixed, regression)

modules/ts/include/opencv2/ts/ts_gtest.h

@@ -21691,7 +21691,9 @@ class WithParamInterface {
     return *GetParameterPtrRef_();
   }
 
+#ifndef __INTEL_COMPILER  // compilation workaround, templated friend is not handled properly by ICC (perhaps due using of anonymous namespaces)
  private:
+#endif
   // Sets parameter value. The caller is responsible for making sure the value
   // remains alive and unchanged throughout the current test.
   static void SetParam(const ParamType* parameter) {

platforms/ios/build_framework.py

@@ -49,7 +49,7 @@ def getXCodeMajor():
         raise Exception("Failed to parse Xcode version")
 
 class Builder:
-    def __init__(self, opencv, contrib, dynamic, bitcodedisabled, exclude, enablenonfree, targets):
+    def __init__(self, opencv, contrib, dynamic, bitcodedisabled, exclude, enablenonfree, targets, debug, debug_info):
         self.opencv = os.path.abspath(opencv)
         self.contrib = None
         if contrib:
@@ -63,6 +63,8 @@ class Builder:
         self.exclude = exclude
         self.enablenonfree = enablenonfree
         self.targets = targets
+        self.debug = debug
+        self.debug_info = debug_info
 
     def getBD(self, parent, t):
 
@@ -125,6 +127,9 @@ class Builder:
     def getToolchain(self, arch, target):
         return None
 
+    def getConfiguration(self):
+        return "Debug" if self.debug else "Release"
+
     def getCMakeArgs(self, arch, target):
 
         args = [
@@ -132,7 +137,7 @@ class Builder:
             "-GXcode",
             "-DAPPLE_FRAMEWORK=ON",
             "-DCMAKE_INSTALL_PREFIX=install",
-            "-DCMAKE_BUILD_TYPE=Release",
+            "-DCMAKE_BUILD_TYPE=%s" % self.getConfiguration(),
             "-DOPENCV_INCLUDE_INSTALL_PATH=include",
             "-DOPENCV_3P_LIB_INSTALL_PATH=lib/3rdparty"
         ] + ([
@@ -141,7 +146,9 @@ class Builder:
             "-DCMAKE_XCODE_ATTRIBUTE_CODE_SIGNING_REQUIRED=NO",
         ] if self.dynamic else []) + ([
             "-DOPENCV_ENABLE_NONFREE=ON"
-        ] if self.enablenonfree else [])
+        ] if self.enablenonfree else []) + ([
+            "-DBUILD_WITH_DEBUG_INFO=ON"
+        ] if self.debug_info else [])
 
         if len(self.exclude) > 0:
             args += ["-DBUILD_opencv_world=OFF"] if not self.dynamic else []
@@ -176,7 +183,7 @@ class Builder:
 
         buildcmd += [
                 "-sdk", target.lower(),
-                "-configuration", "Release",
+                "-configuration", self.getConfiguration(),
                 "-parallelizeTargets",
                 "-jobs", str(multiprocessing.cpu_count()),
             ] + (["-target","ALL_BUILD"] if self.dynamic else [])
@@ -203,10 +210,10 @@ class Builder:
             shutil.rmtree(clean_dir)
         buildcmd = self.getBuildCommand(arch, target)
         execute(buildcmd + ["-target", "ALL_BUILD", "build"], cwd = builddir)
-        execute(["cmake", "-P", "cmake_install.cmake"], cwd = builddir)
+        execute(["cmake", "-DBUILD_TYPE=%s" % self.getConfiguration(), "-P", "cmake_install.cmake"], cwd = builddir)
 
     def mergeLibs(self, builddir):
-        res = os.path.join(builddir, "lib", "Release", "libopencv_merged.a")
+        res = os.path.join(builddir, "lib", self.getConfiguration(), "libopencv_merged.a")
         libs = glob.glob(os.path.join(builddir, "install", "lib", "*.a"))
         libs3 = glob.glob(os.path.join(builddir, "install", "lib", "3rdparty", "*.a"))
         print("Merging libraries:\n\t%s" % "\n\t".join(libs + libs3), file=sys.stderr)
@@ -232,7 +239,7 @@ class Builder:
         shutil.copytree(os.path.join(builddirs[0], "install", "include", "opencv2"), os.path.join(dstdir, "Headers"))
 
         # make universal static lib
-        libs = [os.path.join(d, "lib", "Release", libname) for d in builddirs]
+        libs = [os.path.join(d, "lib", self.getConfiguration(), libname) for d in builddirs]
         lipocmd = ["lipo", "-create"]
         lipocmd.extend(libs)
         lipocmd.extend(["-o", os.path.join(dstdir, name)])
@@ -290,6 +297,8 @@ if __name__ == "__main__":
     parser.add_argument('--iphoneos_archs', default='armv7,armv7s,arm64', help='select iPhoneOS target ARCHS')
     parser.add_argument('--iphonesimulator_archs', default='i386,x86_64', help='select iPhoneSimulator target ARCHS')
     parser.add_argument('--enable_nonfree', default=False, dest='enablenonfree', action='store_true', help='enable non-free modules (disabled by default)')
+    parser.add_argument('--debug', default=False, dest='debug', action='store_true', help='Build "Debug" binaries (disabled by default)')
+    parser.add_argument('--debug_info', default=False, dest='debug_info', action='store_true', help='Build with debug information (useful for Release mode: BUILD_WITH_DEBUG_INFO=ON)')
     args = parser.parse_args()
 
     os.environ['IPHONEOS_DEPLOYMENT_TARGET'] = args.iphoneos_deployment_target
@@ -306,5 +315,5 @@ if __name__ == "__main__":
         [
             (iphoneos_archs, "iPhoneOS"),
             (iphonesimulator_archs, "iPhoneSimulator"),
-        ])
+        ], args.debug, args.debug_info)
     b.build(args.out)

platforms/osx/build_framework.py

@@ -10,6 +10,8 @@ import os, os.path, sys, argparse, traceback, multiprocessing
 sys.path.insert(0, os.path.abspath(os.path.abspath(os.path.dirname(__file__))+'/../ios'))
 from build_framework import Builder
 
+MACOSX_DEPLOYMENT_TARGET='10.12'  # default, can be changed via command line options or environment variable
+
 class OSXBuilder(Builder):
 
     def getToolchain(self, arch, target):
@@ -18,10 +20,10 @@ class OSXBuilder(Builder):
     def getBuildCommand(self, archs, target):
         buildcmd = [
             "xcodebuild",
-            "MACOSX_DEPLOYMENT_TARGET=10.9",
+            "MACOSX_DEPLOYMENT_TARGET=" + os.environ['MACOSX_DEPLOYMENT_TARGET'],
             "ARCHS=%s" % archs[0],
             "-sdk", target.lower(),
-            "-configuration", "Release",
+            "-configuration", "Debug" if self.debug else "Release",
             "-parallelizeTargets",
             "-jobs", str(multiprocessing.cpu_count())
         ]
@@ -39,10 +41,17 @@ if __name__ == "__main__":
     parser.add_argument('--contrib', metavar='DIR', default=None, help='folder with opencv_contrib repository (default is "None" - build only main framework)')
     parser.add_argument('--without', metavar='MODULE', default=[], action='append', help='OpenCV modules to exclude from the framework')
     parser.add_argument('--enable_nonfree', default=False, dest='enablenonfree', action='store_true', help='enable non-free modules (disabled by default)')
+    parser.add_argument('--macosx_deployment_target', default=os.environ.get('MACOSX_DEPLOYMENT_TARGET', MACOSX_DEPLOYMENT_TARGET), help='specify MACOSX_DEPLOYMENT_TARGET')
+    parser.add_argument('--debug', action='store_true', help='Build "Debug" binaries (CMAKE_BUILD_TYPE=Debug)')
+    parser.add_argument('--debug_info', action='store_true', help='Build with debug information (useful for Release mode: BUILD_WITH_DEBUG_INFO=ON)')
+
     args = parser.parse_args()
 
+    os.environ['MACOSX_DEPLOYMENT_TARGET'] = args.macosx_deployment_target
+    print('Using MACOSX_DEPLOYMENT_TARGET=' + os.environ['MACOSX_DEPLOYMENT_TARGET'])
+
     b = OSXBuilder(args.opencv, args.contrib, False, False, args.without, args.enablenonfree,
         [
             (["x86_64"], "MacOSX")
-        ])
+        ], args.debug, args.debug_info)
     b.build(args.out)

samples/python/camshift.py

@@ -8,7 +8,7 @@ This is a demo that shows mean-shift based tracking
 You select a color objects such as your face and it tracks it.
 This reads from video camera (0 by default, or the camera number the user enters)
 
-http://www.robinhewitt.com/research/track/camshift.html
+[1] http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.14.7673
 
 Usage:
 ------