【opencv安装】在TX2上如何卸载并安装opencv

前言

博主想要TX2上使用opencv中的viz模块，需要安装opencv_contrib，目前TX2的opencv版本是刷机的时候安装的opencv3.3.1，需要先卸载，再安装。后来发现opencv3.3.1版本中本含有viz模块，只是更高版本的opencv中viz模块是在opencv_contirb中。

步骤

 1. 卸载TX2刷机的opencv版本；

sudo apt-get purge libopencv*
sudo apt autoremove
sudo apt-get update

2. 安装带有viz模块的opencv3.3.1版本；

2.1. 安装opencv的依赖库，必须在安装opencv之前安装好；

[compiler] sudo apt-get install build-essential
[required] sudo apt-get install cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
[optional] sudo apt-get install python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev

viz模块

sudo apt-get install libvtk5-dev

2.2. 下载源码并解压，包括opencv-3.3.1和opencv_contrib-3.3.1，从github下载，注意两者的版本必须要一致;

/opt$ sudo unzip opencv-3.3.1.zip opencv_contrib-3.3.1.zip
/opt$cd opencv-3.3.1
/opt/opencv-3.3.1$sudo mv ../opencv_contrib-3.3.1 ./
/opt/opencv-3.3.1$sudo mkdir build
/opt/opencv-3.3.1$cd build

2.3. 编译安装；

/opt/opencv-3.3.1/build$ sudo cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local -D OPENCV_EXTRA_MODULES_PATH=../opencv_contrib-3.3.1/modules/ -D WITH_VTK=ON .. 
/opt/opencv-3.3.1/build$sudo make -j8（wait long time）
/opt/opencv-3.3.1/build$sudo make install

其中，

-D WITH_VTK=ON

是关于viz模块的；

问题：cmake的时候正常，make的时候出错，显著性的错误如下：

xfeatures2d/boostdesc: Download failed: 7;"Couldn't connect to server"

and

/opt/opencv-3.3.1/modules/stitching/include/opencv2/stitching/detail/matchers.hpp:52:42: fatal error: opencv2/xfeatures2d/cuda.hpp: No such file or directory
compilation terminated.

解决方法(参考here和here)：

step1:

Github上有网友指出是因为OpenCVDownload.cmake在日志记录功能中出现问题，找到文件

～/opencv-3.3.1/cmake/OpenCVDownload.cmake

将以下代码

  macro(ocv_download_log)
    file(APPEND "${OPENCV_DOWNLOAD_LOG}" "${ARGN}\n")
  endmacro()

修改成

  function(ocv_download_log)
    file(APPEND "${OPENCV_DOWNLOAD_LOG}" "${ARGN}\n")
  endfunction()

 step2:

 cmake命令添加以下内容：

cmake -D BUILD_opencv_xfeatures2d=OFF

 还有说HTTP的安装需要某个版本的cmake(博主没有进行这个问题的操作，具体可参考github的issue)，其他的原因有可能是内存空间不足等。

问题

/opt/opencv-3.3.1/modules/cudacodec/src/precomp.hpp:60:37: fatal error: dynlink_nvcuvid.h: No such file or directory
compilation terminated.

原因：这个问题与系统是否安装CUDA、安装CUDA的版本有关，可以使用-D WITH_CUDA=OFF解决该问题；

make这一步骤完成，build目录占了差不多11G的空间，不清楚build目录能否删除，只安装opencv而不安装contrib则build差不多3G的空间。

 3. 测试opencv和viz模块；

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)
set(CMAKE_CXX_COMPILER "g++")
set_property(GLOBAL PROPERTY USE_FOLDERS ON)
list(APPEND CMAKE_CXX_FLAGS "-O3 -DEBUG -ffast-math -Wall -pthread -fopenmp -std=c++11") #-DNDEBUG
project(test_viz)
# OpenCV
find_package(OpenCV 3.3.1 REQUIRED)
include_directories(${OpenCV_INCLUDE_DIRS})
# message("OpenCV_INCLUDE_DIRS: ${OpenCV_INCLUDE_DIRS}")
# message("OpenCV_LIBS: ${OpenCV_LIBS}")
# VTK
find_package(VTK 5.10 REQUIRED)
include(${VTK_USE_FILE})
# message("VTK_USE_FILE: ${VTK_USE_FILE}")
# message("VTK_LIBRARIES: ${VTK_LIBRARIES}")
# PROJECT
include_directories(include)
aux_source_directory(src DIR_SRCS)
add_executable(${PROJECT_NAME} ${DIR_SRCS})
target_link_libraries(${PROJECT_NAME} ${OpenCV_LIBS} ${VTK_LIBRARIES})

test_code(可以参考github_viz_samples运行各个demo):

#include <iostream>
#include <opencv2/viz.hpp>
#include <opencv2/highgui.hpp>
#include <opencv2/calib3d.hpp>

using namespace std;
using namespace cv;

int main()
{
  viz::Viz3d window("window");
  window.showWidget("Coordinate", viz::WCoordinateSystem());

  viz::WPlane plane(Size2d(2,2), viz::Color::white());
  plane.setRenderingProperty(viz::LINE_WIDTH, 5);
  plane.setPose(Affine3f());
  window.showWidget("plane", plane);

  Mat rvec = Mat::zeros(1, 3, CV_32F);
  while(!window.wasStopped())
  {
    rvec.at<float>(0,0) = 0.f;
    rvec.at<float>(0,1) += CV_PI*0.01f;
    rvec.at<float>(0,2) = 0.f;
    Mat rmat;
    Rodrigues(rvec, rmat);
    Affine3f pose(rmat, Vec3f(0,0,0));
    window.setWidgetPose("plane", pose);
    window.spinOnce(1, true);
  }
}

其中，可能会用一些已有的文件，比如bunny.ply，编译之后所在目录为：

/opt/opencv-3.3.1/samples/cpp/tutorial_code/viz/

后记

可以正常使用opencv viz模块之后，博主想使用之前安装的PCL开源库，发现PCL不能正常使用，不能find PCL的配置文件，可能是安装的时候有冲突，比如VTK;

参考

1. Jetson TX2 卸载并安装OpenCV3.4.0；

2. linux系统卸载opencv；

3. linux系统opencv以及opencv_contrib的安装与使用；

4. opencv_installation_on_linux;

5. github_viz_samples;

完