diff --git a/modules/gpu/test/nvidia/NCVTest.hpp b/modules/gpu/test/nvidia/NCVTest.hpp
index b8c2d9729..00be0f0d1 100644
--- a/modules/gpu/test/nvidia/NCVTest.hpp
+++ b/modules/gpu/test/nvidia/NCVTest.hpp
@@ -124,8 +124,8 @@ private:
 
     bool initMemory(NCVTestReport &report)
     {
-        this->allocatorGPU.reset(new NCVMemStackAllocator(devProp.textureAlignment));
-        this->allocatorCPU.reset(new NCVMemStackAllocator(devProp.textureAlignment));
+        this->allocatorGPU.reset(new NCVMemStackAllocator(static_cast<Ncv32u>(devProp.textureAlignment)));
+        this->allocatorCPU.reset(new NCVMemStackAllocator(static_cast<Ncv32u>(devProp.textureAlignment)));
 
         if (!this->allocatorGPU.get()->isInitialized() ||
             !this->allocatorCPU.get()->isInitialized())
@@ -146,9 +146,9 @@ private:
         report.statsNums["MemGPU"] = maxGPUsize;
         report.statsNums["MemCPU"] = maxCPUsize;
 
-        this->allocatorGPU.reset(new NCVMemStackAllocator(NCVMemoryTypeDevice, maxGPUsize, devProp.textureAlignment));
+        this->allocatorGPU.reset(new NCVMemStackAllocator(NCVMemoryTypeDevice, maxGPUsize, static_cast<Ncv32u>(devProp.textureAlignment)));
 
-        this->allocatorCPU.reset(new NCVMemStackAllocator(NCVMemoryTypeHostPinned, maxCPUsize, devProp.textureAlignment));
+        this->allocatorCPU.reset(new NCVMemStackAllocator(NCVMemoryTypeHostPinned, maxCPUsize, static_cast<Ncv32u>(devProp.textureAlignment)));
 
         if (!this->allocatorGPU.get()->isInitialized() ||
             !this->allocatorCPU.get()->isInitialized())
diff --git a/modules/gpu/test/nvidia/NCVTestSourceProvider.hpp b/modules/gpu/test/nvidia/NCVTestSourceProvider.hpp
index f4f9a392e..99ea6682b 100644
--- a/modules/gpu/test/nvidia/NCVTestSourceProvider.hpp
+++ b/modules/gpu/test/nvidia/NCVTestSourceProvider.hpp
@@ -35,7 +35,7 @@ public:
 
         //Ncv32u maxWpitch = alignUp(maxWidth * sizeof(T), devProp.textureAlignment);
 
-        allocatorCPU.reset(new NCVMemNativeAllocator(NCVMemoryTypeHostPinned, devProp.textureAlignment));
+        allocatorCPU.reset(new NCVMemNativeAllocator(NCVMemoryTypeHostPinned, static_cast<Ncv32u>(devProp.textureAlignment)));
         data.reset(new NCVMatrixAlloc<T>(*this->allocatorCPU.get(), maxWidth, maxHeight));
         ncvAssertPrintReturn(data.get()->isMemAllocated(), "NCVTestSourceProvider ctor:: Matrix not allocated", );
 
@@ -70,7 +70,7 @@ public:
         ncvAssertPrintReturn(cudaSuccess == cudaGetDevice(&devId), "Error returned from cudaGetDevice", );
         ncvAssertPrintReturn(cudaSuccess == cudaGetDeviceProperties(&devProp, devId), "Error returned from cudaGetDeviceProperties", );
 
-        allocatorCPU.reset(new NCVMemNativeAllocator(NCVMemoryTypeHostPinned, devProp.textureAlignment));
+        allocatorCPU.reset(new NCVMemNativeAllocator(NCVMemoryTypeHostPinned, static_cast<Ncv32u>(devProp.textureAlignment)));
         data.reset(new NCVMatrixAlloc<T>(*this->allocatorCPU.get(), image.cols, image.rows));
         ncvAssertPrintReturn(data.get()->isMemAllocated(), "NCVTestSourceProvider ctor:: Matrix not allocated", );
 
diff --git a/modules/gpu/test/nvidia/TestHypothesesFilter.cpp b/modules/gpu/test/nvidia/TestHypothesesFilter.cpp
index c75890d22..4785abae4 100644
--- a/modules/gpu/test/nvidia/TestHypothesesFilter.cpp
+++ b/modules/gpu/test/nvidia/TestHypothesesFilter.cpp
@@ -132,7 +132,7 @@ bool TestHypothesesFilter::process()
     }
     NCV_SKIP_COND_END
 
-    Ncv32u numHypothesesSrc = h_vecSrc.length();
+    Ncv32u numHypothesesSrc = static_cast<Ncv32u>(h_vecSrc.length());
     NCV_SKIP_COND_BEGIN
     ncvStat = ncvGroupRectangles_host(h_vecSrc, numHypothesesSrc, this->minNeighbors, this->eps, NULL);
     ncvAssertReturn(ncvStat == NCV_SUCCESS, false);
diff --git a/modules/gpu/test/test_arithm.cpp b/modules/gpu/test/test_arithm.cpp
index 0c7494fd2..a8fcccdca 100644
--- a/modules/gpu/test/test_arithm.cpp
+++ b/modules/gpu/test/test_arithm.cpp
@@ -1486,7 +1486,7 @@ struct BitwiseNot : testing::TestWithParam< std::tr1::tuple<cv::gpu::DeviceInfo,
         
         for (int i = 0; i < mat.rows; ++i)
         {
-            cv::Mat row(1, mat.cols * mat.elemSize(), CV_8U, (void*)mat.ptr(i));
+            cv::Mat row(1, static_cast<int>(mat.cols * mat.elemSize()), CV_8U, (void*)mat.ptr(i));
             rng.fill(row, cv::RNG::UNIFORM, cv::Scalar(0), cv::Scalar(255));
         }
 
@@ -1547,10 +1547,10 @@ struct BitwiseOr : testing::TestWithParam< std::tr1::tuple<cv::gpu::DeviceInfo,
         
         for (int i = 0; i < mat1.rows; ++i)
         {
-            cv::Mat row1(1, mat1.cols * mat1.elemSize(), CV_8U, (void*)mat1.ptr(i));
+            cv::Mat row1(1, static_cast<int>(mat1.cols * mat1.elemSize()), CV_8U, (void*)mat1.ptr(i));
             rng.fill(row1, cv::RNG::UNIFORM, cv::Scalar(0), cv::Scalar(255));
 
-            cv::Mat row2(1, mat2.cols * mat2.elemSize(), CV_8U, (void*)mat2.ptr(i));
+            cv::Mat row2(1, static_cast<int>(mat2.cols * mat2.elemSize()), CV_8U, (void*)mat2.ptr(i));
             rng.fill(row2, cv::RNG::UNIFORM, cv::Scalar(0), cv::Scalar(255));
         }
 
@@ -1611,10 +1611,10 @@ struct BitwiseAnd : testing::TestWithParam< std::tr1::tuple<cv::gpu::DeviceInfo,
         
         for (int i = 0; i < mat1.rows; ++i)
         {
-            cv::Mat row1(1, mat1.cols * mat1.elemSize(), CV_8U, (void*)mat1.ptr(i));
+            cv::Mat row1(1, static_cast<int>(mat1.cols * mat1.elemSize()), CV_8U, (void*)mat1.ptr(i));
             rng.fill(row1, cv::RNG::UNIFORM, cv::Scalar(0), cv::Scalar(255));
 
-            cv::Mat row2(1, mat2.cols * mat2.elemSize(), CV_8U, (void*)mat2.ptr(i));
+            cv::Mat row2(1, static_cast<int>(mat2.cols * mat2.elemSize()), CV_8U, (void*)mat2.ptr(i));
             rng.fill(row2, cv::RNG::UNIFORM, cv::Scalar(0), cv::Scalar(255));
         }
 
@@ -1675,10 +1675,10 @@ struct BitwiseXor : testing::TestWithParam< std::tr1::tuple<cv::gpu::DeviceInfo,
         
         for (int i = 0; i < mat1.rows; ++i)
         {
-            cv::Mat row1(1, mat1.cols * mat1.elemSize(), CV_8U, (void*)mat1.ptr(i));
+            cv::Mat row1(1, static_cast<int>(mat1.cols * mat1.elemSize()), CV_8U, (void*)mat1.ptr(i));
             rng.fill(row1, cv::RNG::UNIFORM, cv::Scalar(0), cv::Scalar(255));
 
-            cv::Mat row2(1, mat2.cols * mat2.elemSize(), CV_8U, (void*)mat2.ptr(i));
+            cv::Mat row2(1, static_cast<int>(mat2.cols * mat2.elemSize()), CV_8U, (void*)mat2.ptr(i));
             rng.fill(row2, cv::RNG::UNIFORM, cv::Scalar(0), cv::Scalar(255));
         }
 
diff --git a/modules/gpu/test/test_features2d.cpp b/modules/gpu/test/test_features2d.cpp
index 0479cc2fa..5e9f22ef4 100644
--- a/modules/gpu/test/test_features2d.cpp
+++ b/modules/gpu/test/test_features2d.cpp
@@ -143,7 +143,7 @@ TEST_P(SURF, Accuracy)
     cv::BruteForceMatcher< cv::L2<float> > matcher;
     std::vector<cv::DMatch> matches;
 
-    matcher.match(cv::Mat(keypoints_gold.size(), 64, CV_32FC1, &descriptors_gold[0]), descriptors, matches);
+    matcher.match(cv::Mat(static_cast<int>(keypoints_gold.size()), 64, CV_32FC1, &descriptors_gold[0]), descriptors, matches);
 
     int validCount = 0;
     
diff --git a/modules/stitching/matchers.cpp b/modules/stitching/matchers.cpp
index 9a7c0e12e..12a8ba253 100644
--- a/modules/stitching/matchers.cpp
+++ b/modules/stitching/matchers.cpp
@@ -397,8 +397,8 @@ void BestOf2NearestMatcher::match(const ImageFeatures &features1, const ImageFea
         return;
 
     // Construct point-point correspondences for homography estimation
-    Mat src_points(1, matches_info.matches.size(), CV_32FC2);
-    Mat dst_points(1, matches_info.matches.size(), CV_32FC2);
+    Mat src_points(1, static_cast<int>(matches_info.matches.size()), CV_32FC2);
+    Mat dst_points(1, static_cast<int>(matches_info.matches.size()), CV_32FC2);
     for (size_t i = 0; i < matches_info.matches.size(); ++i)
     {
         const DMatch& m = matches_info.matches[i];
@@ -406,12 +406,12 @@ void BestOf2NearestMatcher::match(const ImageFeatures &features1, const ImageFea
         Point2f p = features1.keypoints[m.queryIdx].pt;
         p.x -= features1.img_size.width * 0.5f;
         p.y -= features1.img_size.height * 0.5f;
-        src_points.at<Point2f>(0, i) = p;
+        src_points.at<Point2f>(0, static_cast<int>(i)) = p;
 
         p = features2.keypoints[m.trainIdx].pt;
         p.x -= features2.img_size.width * 0.5f;
         p.y -= features2.img_size.height * 0.5f;
-        dst_points.at<Point2f>(0, i) = p;
+        dst_points.at<Point2f>(0, static_cast<int>(i)) = p;
     }
 
     // Find pair-wise motion
diff --git a/modules/stitching/motion_estimators.cpp b/modules/stitching/motion_estimators.cpp
index 763c4a68d..08d1aaec2 100644
--- a/modules/stitching/motion_estimators.cpp
+++ b/modules/stitching/motion_estimators.cpp
@@ -405,7 +405,7 @@ vector<int> leaveBiggestComponent(vector<ImageFeatures> &features,  vector<Match
         }
     }
 
-    int max_comp = max_element(comps.size.begin(), comps.size.end()) - comps.size.begin();
+    int max_comp = static_cast<int>(max_element(comps.size.begin(), comps.size.end()) - comps.size.begin());
 
     vector<int> indices;
     vector<int> indices_removed;
@@ -423,8 +423,8 @@ vector<int> leaveBiggestComponent(vector<ImageFeatures> &features,  vector<Match
         for (size_t j = 0; j < indices.size(); ++j)
         {
             pairwise_matches_subset.push_back(pairwise_matches[indices[i]*num_images + indices[j]]);
-            pairwise_matches_subset.back().src_img_idx = i;
-            pairwise_matches_subset.back().dst_img_idx = j;
+            pairwise_matches_subset.back().src_img_idx = static_cast<int>(i);
+            pairwise_matches_subset.back().dst_img_idx = static_cast<int>(j);
         }
     }
 
diff --git a/samples/gpu/cascadeclassifier_nvidia_api.cpp b/samples/gpu/cascadeclassifier_nvidia_api.cpp
index 7c6cbc0dc..923e0a302 100644
--- a/samples/gpu/cascadeclassifier_nvidia_api.cpp
+++ b/samples/gpu/cascadeclassifier_nvidia_api.cpp
@@ -212,9 +212,9 @@ int main(int argc, const char** argv)
     //
     //==============================================================================
 
-    NCVMemNativeAllocator gpuCascadeAllocator(NCVMemoryTypeDevice, devProp.textureAlignment);
+    NCVMemNativeAllocator gpuCascadeAllocator(NCVMemoryTypeDevice, static_cast<Ncv32u>(devProp.textureAlignment));
     ncvAssertPrintReturn(gpuCascadeAllocator.isInitialized(), "Error creating cascade GPU allocator", -1);
-    NCVMemNativeAllocator cpuCascadeAllocator(NCVMemoryTypeHostPinned, devProp.textureAlignment);
+    NCVMemNativeAllocator cpuCascadeAllocator(NCVMemoryTypeHostPinned, static_cast<Ncv32u>(devProp.textureAlignment));
     ncvAssertPrintReturn(cpuCascadeAllocator.isInitialized(), "Error creating cascade CPU allocator", -1);
 
     Ncv32u haarNumStages, haarNumNodes, haarNumFeatures;
@@ -252,9 +252,9 @@ int main(int argc, const char** argv)
     //
     //==============================================================================
 
-    NCVMemStackAllocator gpuCounter(devProp.textureAlignment);
+    NCVMemStackAllocator gpuCounter(static_cast<Ncv32u>(devProp.textureAlignment));
     ncvAssertPrintReturn(gpuCounter.isInitialized(), "Error creating GPU memory counter", -1);
-    NCVMemStackAllocator cpuCounter(devProp.textureAlignment);
+    NCVMemStackAllocator cpuCounter(static_cast<Ncv32u>(devProp.textureAlignment));
     ncvAssertPrintReturn(cpuCounter.isInitialized(), "Error creating CPU memory counter", -1);
 
     ncvStat = process(NULL, frameSize.width, frameSize.height,
@@ -264,9 +264,9 @@ int main(int argc, const char** argv)
                       gpuCounter, cpuCounter, devProp);
     ncvAssertPrintReturn(ncvStat == NCV_SUCCESS, "Error in memory counting pass", -1);
 
-    NCVMemStackAllocator gpuAllocator(NCVMemoryTypeDevice, gpuCounter.maxSize(), devProp.textureAlignment);
+    NCVMemStackAllocator gpuAllocator(NCVMemoryTypeDevice, gpuCounter.maxSize(), static_cast<Ncv32u>(devProp.textureAlignment));
     ncvAssertPrintReturn(gpuAllocator.isInitialized(), "Error creating GPU memory allocator", -1);
-    NCVMemStackAllocator cpuAllocator(NCVMemoryTypeHostPinned, cpuCounter.maxSize(), devProp.textureAlignment);
+    NCVMemStackAllocator cpuAllocator(NCVMemoryTypeHostPinned, cpuCounter.maxSize(), static_cast<Ncv32u>(devProp.textureAlignment));
     ncvAssertPrintReturn(cpuAllocator.isInitialized(), "Error creating CPU memory allocator", -1);
 
     printf("Initialized for frame size [%dx%d]\n", frameSize.width, frameSize.height);