标签：sage libjpeg oca pytho [] code 多次 mdf deb
用如下方法编译opencv:
git clone "https://github.com/opencv/opencv.git"
mkdir opencv_debug
cd opencv
mkdir build
cd build
cmake ..
#查看编译选项
cmake -LA | awk ‘{if(f)print} /-- Cache values/{f=1}‘
#我的编译选项（其实反复了很多次）
/usr/local/bin/cmake .. -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=/data/ahfuzhang/install_packages/opencv_debug/ -DBUILD_SHARED_LIBS=OFF -DBUILD_WITH_DYNAMIC_IPP=OFF -DWITH_IPP=OFF -DBUILD_IPP_IW=OFF -DBUILD_ITT=OFF -DBUILD_JAVA=OFF -DBUILD_PROTOBUF=OFF -DBUILD_TESTS=OFF -DBUILD_opencv_apps=OFF -DBUILD_opencv_python_bindings_generator=OFF -DWITH_CUDA=OFF -DWITH_ITT=OFF -DWITH_OPENCL=OFF -DWITH_OPENCLAMDBLAS=OFF -DWITH_OPENCLAMDFFT=OFF -DWITH_PROTOBUF=OFF -DWITH_OPENEXR=OFF -DWITH_JASPER=OFF -DWITH_PNG=OFF -DWITH_WEBP=OFF
make -j20 #我核多，土豪
make install
写了如下一个计算图像直方图的程序：
//image_hist.cpp
#include <iostream>
#include <opencv2/imgproc.hpp>
#include <opencv2/highgui.hpp>
using namespace cv;
using namespace std;
int main( int argc, char** argv )
{
if (argc<2){
printf("usage:%s <img>\n", argv[0]);
return -1;
}
Mat img = imread(argv[1], IMREAD_UNCHANGED);
if (img.data==NULL){
printf("read file fail\n");
return -1;
}
int channels[] = {0};
int histSize[] = {256, 1};
float _ranges[] = { 0, 256 };
const float* ranges[] = {_ranges};
Mat hist;
calcHist(&img, 1, channels, Mat(), hist, 2, histSize, ranges, true, false);
for (int i=0; i<256; ++i){
int count = (int)hist.at<float>(i, 0);
printf("%d ", count);
}
return 0;
}
编译：
g++ -o image_hist.o -c image_hist.cpp -g -I"/data/ahfuzhang/install_packages/opencv_debug/include/opencv4/" -std=c++11
链接：
g++ -o image_hist image_hist.o -L"/data/home/ahfuzhang/install_packages/opencv_build/lib64/" -lopencv_calib3d -lopencv_features2d -lopencv_flann -lopencv_gapi -lopencv_highgui -lopencv_imgcodecs -lopencv_imgproc -lopencv_ml -lopencv_objdetect -lopencv_photo -lopencv_stitching -lopencv_video -lopencv_videoio -lopencv_core -lrt -lpthread -ldl -lz "/usr/lib64/liblapack.so.3.4.2" -lopenblas "/usr/lib64/libjpeg.so.62.1.0" "/usr/lib64/libtiff.so.5.2.0"
运行：
./image_hist 1.jpg
read file fail
DEMO并未运行成功，网上搜了是库的问题，等下继续解决！
opencv debug版本在linux下编译，并写了一个DEMO
标签：sage libjpeg oca pytho [] code 多次 mdf deb
原文地址：https://www.cnblogs.com/ahfuzhang/p/10184539.html
