opencv4 install:
download opencv4.1.2
https://opencv.org/opencv-4-1-2/
cmake:
cmake -D CMAKE_BUILD_TYPE=Release -D OPENCV_GENERATE_PKGCONFIG=ON -D CMAKE_INSTALL_PREFIX=/usr/local/opencv4 ..
ch8 cmake file:
cmake_minimum_required(VERSION 2.8)
project(ch8)
set(CMAKE_BUILD_TYPE "Release")
add_definitions("-DENABLE_SSE")
set(CMAKE_CXX_FLAGS "-std=c++14 ${SSE_FLAGS} -g -O3 -march=native")
find_package(OpenCV 4 REQUIRED)
find_package(Sophus REQUIRED)
find_package(Pangolin REQUIRED)
find_package(fmt REQUIRED)
include_directories(${fmt_INCLUDE_DIRS})
# target_link_libraries(joinMap fmt::fmt)
set(FMT_LIBRARIES fmt::fmt)
include_directories(
${OpenCV_INCLUDE_DIRS}
${G2O_INCLUDE_DIRS}
${Sophus_INCLUDE_DIRS}
"/usr/include/eigen3/"
${Pangolin_INCLUDE_DIRS}
)
add_executable(optical_flow optical_flow.cpp)
target_link_libraries(optical_flow ${OpenCV_LIBS} fmt)
add_executable(direct_method direct_method.cpp)
target_link_libraries(direct_method ${OpenCV_LIBS} ${Pangolin_LIBRARIES} fmt)
ch8 cmake:
cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=/usr/local/opencv4/lib/cmake/opencv4 ..
error: ‘CV_GRAY2BGR’ was not declared in this scope
v::cvtColor(img2, img2_single,/*cv::CV_GRAY2BGR*/cv::COLOR_GRAY2BGR);
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