目录
前言：
上篇文章搭建 OpenCV 环境的时候，因为显卡太渣，使用 gpu 的加速效果不好，而且配置的 cuda 和 cuDNN 版本较老，索性全部卸载了。但毕竟 gpu 加速是大趋势，折腾一下还是必要的，这次就将 cuda 环境给 OpenCV 配置上。
本文配置：
之前配置 +（cuda 10.2 + cuDNN 7.6.5）
其他和上篇博客一致，本文也是在其基础上重新编译一次。
最终测试没有成功，折腾了好多天，感觉不是特例，有类似情况的欢迎评论区留言讨论。
Ⅰ、安装 cuda cuDNN
1-1. 安装 cuda
本机显卡：GrForce 940MX，最新驱动版本 03/02/2020 发布，从控制面板可以看出支持最新的 cuda 10.2 版本，直接去官网下载 cuda 10.2，可以直接下载 local 版本，方便安装。
安装过程1较为简单，直接按默认的就可以，安装时不能打开 Visual Studio。
注意如果之前安装过其他版本的 cuda，系统变量 Path 可能位置不够，安装程序会报如下警告：
按照报错信息，可以再安装完成后将旧环境变量删除，并将未加上的部分加上，也可以重新运行安装程序。
安装完成后，运行
C:\ProgramData\NVIDIA Corporation\CUDA Samples\v10.2\1_Utilities\deviceQuery目录下的示例程序，直接用 VS2019 打开deviceQuery_vs2019.sln并运行，输出信息如下：
1-2. 安装 cuDNN
与其说是安装 cuDNN，不如说是将 cuDNN 源代码文件添加到 cuda 的文件夹中。
下载适配 cuda 10.2 的 cuDNN v7.6.5，需要 Nvidia 账号，将下载后的安装包解压后得到的三个文件夹：bin，include，lib中的三个文件：cudnn64_7.dll，cudnn.h，cudnn.lib分别复制到 cuda 的安装目录，默认是在C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.2的对应目录下，便完成了 cuDNN 的安装。
Ⅱ、重新编译 OpenCV
为了使环境变量生效，注意要在安装 cuda 后再打开 cmake-gui，并且设置新的目标文件夹。
这次不止需要：
勾选BUILD_opencv_world，
设置OPENCV_EXTRA_MODULE_PATH 为：安装目录/opencv_contrib/modules
还需要勾选：OPENCV_DNN_CUDA 和 WITH_CUDA
之后点击 configure
如果出现 OpenCVGenSetupVars.cmake 抛出错误的话，可以将OPENCV_GENERATE_SETUPVARS取消勾选。
再将 CUDA_ARCH_BIN 根据自己显卡算力设置，本机设置为 5.0
这里根据自己的需求可以有更多的设置，如：GStreamer、Eigen、OpenGL 等组件可以自行配置，我尝试了 GStreamer，(参考GStreamer+win10+vs2015配置) 最后运行官方文档实例程序(如下)，仍然有 Failed 输出信息，但程序正常运行。
#include "opencv2/imgproc.hpp"
#include "opencv2/highgui.hpp"
using namespace cv;
int main(int, char**)
{
VideoCapture cap(0);
if(!cap.isOpened()) return -1;
Mat frame, edges;
namedWindow("edges", WINDOW_AUTOSIZE);
for(;;)
{
cap >> frame;
cvtColor(frame, edges, COLOR_BGR2GRAY);
GaussianBlur(edges, edges, Size(7,7), 1.5, 1.5);
Canny(edges, edges, 0, 30, 3);
imshow("edges", edges);
if(waitKey(30) >= 0) break;
}
return 0;
}
具体配置不再一一列举，文末给出最终 cmake 配置输出。
再次点击 configure，确保没有红色显示的设置信息。
完成后可以看到输出信息中 cuda 已经被支持：
之后的操作就和之前一样了，点击 Generate，全部配置好后，打开 VS 进行编译，这次需要的时间会更长，几乎是上次的两倍。
在编译生成 Debug 版本时有一个关于 opencv_python 的生成失败，报错无法打开 python37_d.lib，原因是缺少 Debug 版本的 python，对于 Anaconda 用户，可以参照该文章解决2，即：
首先在 Anaconda 目录下搜索 pyconfig.h，对该文件做下面两处修改：
Ⅲ、测试安装结果
3-1. 添加配置项
上篇文章是直接对测试工程项目进行配置，这种方式，每次创建新工程都需要重新配置，较为麻烦，这次采用添加配置文件的方式，以后新建项目就可以直接导入该配置文件。
下面以添加 Debug | x64 为例：
此时该配置文件已经应用到该项目中，并且可以导出复用。
3-2. OpenCV_cuda 测试结果
测试代码：
#include <iostream>
#include <opencv2/core/cuda.hpp>
using namespace std;
int main(int argc, char** argv)
{
try
{
cout << cv::cuda::getCudaEnabledDeviceCount() << endl;
}
catch (const cv::Exception & ex)
{
cout << "Error:" << ex.what() << endl;
}
system("PAUSE");
return 0;
}
输出结果：
opencv_docs 中的解释：
说明这里配置有问题，未成功，原因未知，欢迎有遇到相同情况的留言讨论。
cmake 最终的配置输出：
Selecting Windows SDK version 10.0.18362.0 to target Windows 10.0.18363.
Detected processor: AMD64
libjpeg-turbo: VERSION = 2.0.2, BUILD = opencv-4.2.0-dev-libjpeg-turbo
found Intel IPP (ICV version): 2019.0.0 [2019.0.0 Gold]
at: E:/code_env/opencv/build_test/3rdparty/ippicv/ippicv_win/icv
found Intel IPP Integration Wrappers sources: 2019.0.0
at: E:/code_env/opencv/build_test/3rdparty/ippicv/ippicv_win/iw
CUDA detected: 10.2
CUDA NVCC target flags: -gencode;arch=compute_50,code=sm_50;-D_FORCE_INLINES
Could not find OpenBLAS include. Turning OpenBLAS_FOUND off
Could not find OpenBLAS lib. Turning OpenBLAS_FOUND off
Could NOT find BLAS (missing: BLAS_LIBRARIES)
LAPACK requires BLAS
A library with LAPACK API not found. Please specify library location.
Could NOT find JNI (missing: JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY JAVA_INCLUDE_PATH JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH)
VTK is not found. Please set -DVTK_DIR in CMake to VTK build directory, or to VTK install subdirectory with VTKConfig.cmake file
OpenCV Python: during development append to PYTHONPATH: E:/code_env/opencv/build_test/python_loader
Caffe: NO
Protobuf: NO
Glog: NO
freetype2: NO
harfbuzz: NO
Module opencv_ovis disabled because OGRE3D was not found
No preference for use of exported gflags CMake configuration set, and no hints for include/library directories provided. Defaulting to preferring an installed/exported gflags CMake configuration if available.
Failed to find installed gflags CMake configuration, searching for gflags build directories exported with CMake.
Failed to find gflags - Failed to find an installed/exported CMake configuration for gflags, will perform search for installed gflags components.
Failed to find gflags - Could not find gflags include directory, set GFLAGS_INCLUDE_DIR to directory containing gflags/gflags.h
Failed to find glog - Could not find glog include directory, set GLOG_INCLUDE_DIR to directory containing glog/logging.h
Module opencv_sfm disabled because the following dependencies are not found: Eigen Glog/Gflags
Tesseract: NO
Processing WORLD modules...
module opencv_cudev...
module opencv_core...
module opencv_cudaarithm...
module opencv_flann...
module opencv_hdf...
module opencv_imgproc...
module opencv_intensity_transform...
module opencv_ml...
module opencv_phase_unwrapping...
module opencv_plot...
module opencv_quality...
module opencv_reg...
module opencv_surface_matching...
module opencv_cudafilters...
module opencv_cudaimgproc...
module opencv_cudawarping...
module opencv_dnn...
Registering hook 'INIT_MODULE_SOURCES_opencv_dnn': E:/code_env/opencv/modules/dnn/cmake/hooks/INIT_MODULE_SOURCES_opencv_dnn.cmake
module opencv_dnn_superres...
module opencv_features2d...
module opencv_fuzzy...
module opencv_gapi...
module opencv_hfs...
module opencv_imgcodecs...
module opencv_line_descriptor...
module opencv_photo...
module opencv_saliency...
module opencv_text...
module opencv_videoio...
module opencv_xphoto...
module opencv_calib3d...
module opencv_cudacodec...
module opencv_cudafeatures2d...
module opencv_cudastereo...
module opencv_datasets...
module opencv_highgui...
module opencv_objdetect...
module opencv_rapid...
module opencv_rgbd...
module opencv_shape...
module opencv_structured_light...
module opencv_video...
module opencv_xfeatures2d...
module opencv_ximgproc...
module opencv_xobjdetect...
module opencv_aruco...
module opencv_bgsegm...
module opencv_bioinspired...
module opencv_ccalib...
module opencv_cudabgsegm...
module opencv_cudalegacy...
module opencv_cudaobjdetect...
module opencv_dnn_objdetect...
module opencv_dpm...
module opencv_face...
module opencv_optflow...
module opencv_stitching...
module opencv_tracking...
module opencv_cudaoptflow...
module opencv_stereo...
module opencv_superres...
module opencv_videostab...
Processing WORLD modules... DONE
General configuration for OpenCV 4.2.0-dev =====================================
Version control: unknown
Extra modules:
Location (extra): E:/code_env/opencv_contrib/modules
Version control (extra): unknown
Platform:
Timestamp: 2020-02-26T04:19:40Z
Host: Windows 10.0.18363 AMD64
CMake: 3.15.5
CMake generator: Visual Studio 16 2019
CMake build tool: C:/accelerate/VisualStudio/MSBuild/Current/Bin/MSBuild.exe
MSVC: 1924
CPU/HW features:
Baseline: SSE SSE2 SSE3
requested: SSE3
Dispatched code generation: SSE4_1 SSE4_2 FP16 AVX AVX2 AVX512_SKX
requested: SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX
SSE4_1 (16 files): + SSSE3 SSE4_1
SSE4_2 (2 files): + SSSE3 SSE4_1 POPCNT SSE4_2
FP16 (1 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX
AVX (5 files): + SSSE3 SSE4_1 POPCNT SSE4_2 AVX
AVX2 (30 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2
AVX512_SKX (6 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2 AVX_512F AVX512_COMMON AVX512_SKX
C/C++:
Built as dynamic libs?: YES
C++ Compiler: C:/accelerate/VisualStudio/VC/Tools/MSVC/14.24.28314/bin/Hostx64/x64/cl.exe (ver 19.24.28316.0)
C++ flags (Release): /DWIN32 /D_WINDOWS /W4 /GR /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 /MP /MD /O2 /Ob2 /DNDEBUG
C++ flags (Debug): /DWIN32 /D_WINDOWS /W4 /GR /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 /MP /MDd /Zi /Ob0 /Od /RTC1
C Compiler: C:/accelerate/VisualStudio/VC/Tools/MSVC/14.24.28314/bin/Hostx64/x64/cl.exe
C flags (Release): /DWIN32 /D_WINDOWS /W3 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /MP /MD /O2 /Ob2 /DNDEBUG
C flags (Debug): /DWIN32 /D_WINDOWS /W3 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /fp:precise /MP /MDd /Zi /Ob0 /Od /RTC1
Linker flags (Release): /machine:x64 /INCREMENTAL:NO
Linker flags (Debug): /machine:x64 /debug /INCREMENTAL
ccache: NO
Precompiled headers: NO
Extra dependencies: cudart_static.lib nppc.lib nppial.lib nppicc.lib nppicom.lib nppidei.lib nppif.lib nppig.lib nppim.lib nppist.lib nppisu.lib nppitc.lib npps.lib cublas.lib cudnn.lib cufft.lib -LIBPATH:C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v10.2/lib/x64
3rdparty dependencies:
OpenCV modules:
To be built: aruco bgsegm bioinspired calib3d ccalib core cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev datasets dnn dnn_objdetect dnn_superres dpm face features2d flann fuzzy gapi hdf hfs highgui img_hash imgcodecs imgproc intensity_transform line_descriptor ml objdetect optflow phase_unwrapping photo plot python3 quality rapid reg rgbd saliency shape stereo stitching structured_light superres surface_matching text tracking ts video videoio videostab world xfeatures2d ximgproc xobjdetect xphoto
Disabled: -
Disabled by dependency: -
Unavailable: cnn_3dobj cvv freetype java js matlab ovis python2 python2 sfm viz
Applications: tests perf_tests apps
Documentation: NO
Non-free algorithms: YES
Windows RT support: NO
GUI:
Win32 UI: YES
VTK support: NO
Media I/O:
ZLib: build (ver 1.2.11)
JPEG: build-libjpeg-turbo (ver 2.0.2-62)
WEBP: build (ver encoder: 0x020e)
PNG: build (ver 1.6.37)
TIFF: build (ver 42 - 4.0.10)
JPEG 2000: build (ver 1.900.1)
OpenEXR: build (ver 2.3.0)
HDR: YES
SUNRASTER: YES
PXM: YES
PFM: YES
Video I/O:
DC1394: NO
FFMPEG: YES (prebuilt binaries)
avcodec: YES (58.54.100)
avformat: YES (58.29.100)
avutil: YES (56.31.100)
swscale: YES (5.5.100)
avresample: YES (4.0.0)
GStreamer: YES (1.16.2)
DirectShow: YES
Media Foundation: YES
DXVA: YES
Parallel framework: Concurrency
Trace: YES (with Intel ITT)
Other third-party libraries:
Intel IPP: 2019.0.0 Gold [2019.0.0]
at: E:/code_env/opencv/build_test/3rdparty/ippicv/ippicv_win/icv
Intel IPP IW: sources (2019.0.0)
at: E:/code_env/opencv/build_test/3rdparty/ippicv/ippicv_win/iw
Lapack: NO
Eigen: NO
Custom HAL: NO
Protobuf: build (3.5.1)
NVIDIA CUDA: YES (ver 10.2, CUFFT CUBLAS FAST_MATH)
NVIDIA GPU arch: 50
NVIDIA PTX archs:
cuDNN: YES (ver 7.6.5)
OpenCL: YES (NVD3D11)
Include path: E:/code_env/opencv/3rdparty/include/opencl/1.2
Link libraries: Dynamic load
Python 3:
Interpreter: E:/code_env/Anaconda3/python.exe (ver 3.7)
Libraries: E:/code_env/Anaconda3/libs/python37.lib (ver 3.7.0)
numpy: E:/code_env/Anaconda3/lib/site-packages/numpy/core/include (ver 1.15.1)
install path: E:/code_env/Anaconda3/Lib/site-packages/cv2/python-3.7
Python (for build): E:/code_env/Anaconda3/python.exe
Java:
ant: NO
JNI: NO
Java wrappers: NO
Java tests: NO
Install to: E:/code_env/opencv/build_test/install
-----------------------------------------------------------------
Configuring done
Generating done
参考文章
