树莓派学习笔记——apt方式安装OpenCV

#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>
using namespace cv;
using namespace std;
int main (int argc, char **argv)
{
    Mat image, image_gray;
    image = imread(argv[1], CV_LOAD_IMAGE_COLOR );
    if (argc != 2 || !image.data) {
        cout << "No image data\n";
        return -1;
    }
   
    cvtColor(image, image_gray, CV_RGB2GRAY);
    namedWindow("image", CV_WINDOW_AUTOSIZE);
    namedWindow("image gray", CV_WINDOW_AUTOSIZE);
   
    imshow("image", image);
    imshow("image gray", image_gray);
   
    waitKey(0);
    return 0;
}

CC = g++
# 可执行文件
TARGET = test
# C文件
SRCS = test.cpp
# 目标文件
OBJS = $(SRCS:.cpp=.o)
# 库文件
DLIBS = -lopencv_core -lopencv_imgproc -lopencv_highgui
# 链接为可执行文件
$(TARGET):$(OBJS)
 $(CC) -o $@ $^ $(DLIBS)
clean:
 rm -rf $(TARGET) $(OBJS)
# 编译规则 $@代表目标文件 $< 代表第一个依赖文件
%.o:%.cpp
 $(CC) -o $@ -c $<