c语言编写用opencv将路径/root/photo/compressphoto中的.jpg图片解压缩到路径/root/photo/decompressphoto中，给出相应程序和对应的Makefile文件，注意opencv文件处于/root/opencv-4.5.1文件夹中。并说明如何使用以及设置参数

程序如下：

#include <opencv2/opencv.hpp>
#include <iostream>
#include <fstream>
#include <string>

using namespace std;
using namespace cv;

int main(int argc, char** argv) {
    if (argc != 3) {
        cout << "Usage: ./decompressphoto compressed_path decompressed_path" << endl;
        return -1;
    }

    string compressed_path = argv[1];
    string decompressed_path = argv[2];

    ifstream fin(compressed_path, ios::binary);
    if (!fin) {
        cout << "Failed to open file: " << compressed_path << endl;
        return -1;
    }

    vector<uchar> buffer((istreambuf_iterator<char>(fin)), (istreambuf_iterator<char>()));
    Mat data(buffer, true);
    Mat image = imdecode(data, IMREAD_UNCHANGED);

    if (image.empty()) {
        cout << "Failed to decode image: " << compressed_path << endl;
        return -1;
    }

    if (!imwrite(decompressed_path, image)) {
        cout << "Failed to write image: " << decompressed_path << endl;
        return -1;
    }

    cout << "Decompressed successfully!" << endl;

    return 0;
}

Makefile文件如下：

CC = g++
CFLAGS = -g -Wall
INCLUDES = -I/root/opencv-4.5.1/include/opencv4
LFLAGS = -L/root/opencv-4.5.1/lib
LIBS = -lopencv_core -lopencv_imgcodecs
TARGET = decompressphoto

$(TARGET): $(TARGET).cpp
    $(CC) $(CFLAGS) $(INCLUDES) $(LFLAGS) -o $@ $< $(LIBS)

clean:
    rm -f $(TARGET)

使用方法：

1. 将上述程序保存为decompressphoto.cpp，Makefile文件保存为Makefile。
2. 打开终端，进入程序所在目录。
3. 执行`make`命令生成可执行文件。
4. 执行`./decompressphoto compressed_path decompressed_path`命令，其中compressed_path为压缩后的.jpg图片路径，decompressed_path为解压后存储的路径。

参数设置：

无需设置参数，直接执行即可。