如何在C ++中将字节数组转换回jpeg

Question

因此，在下面的代码中，我使用fstream读取文件并将其转换为字节向量，我想知道是否存在一种无需下载外部C ++库即可将其转换回jpeg图像的方法。我觉得应该有一种方法可以只获取字节数组并以某种方式返回图像。

std::vector<unsigned int> getByteArray(std::string filename){
    // Define file stream object, and open the file
    std::ifstream file (filename, std::ios::binary); //reads in the file

    // Prepare iterator pairs to iterate the file content!
    std::istream_iterator<unsigned char> begin(file), end; //creates an iterator of type unsigned char to read from begin of ile to end

    std::vector<unsigned int> buffer(begin,end); //putting the values in a vector called buffer

    //std::copy(buffer.begin(), buffer.end(), std::ostream_iterator<unsigned int>(std::cout <<","));
    for(int i=0;i<buffer.size();i++){
        std::cout<<buffer[i];
    }



}

Answer 1

您已经掌握了。