Как можно оптимизировать данный код (OpenCV, Sreenshot)?

int main() {
 
    Sreenshot sreenshot(GetSystemMetrics(SM_CXVIRTUALSCREEN), GetSystemMetrics(SM_CYVIRTUALSCREEN), GetSystemMetrics(SM_XVIRTUALSCREEN), GetSystemMetrics(SM_YVIRTUALSCREEN));
 
    Mat bacroundImage = imread("hex0.png", IMREAD_UNCHANGED);
 
    cv::imshow("hex0", bacroundImage);
    cv::waitKey(0);
 
    return 0;
}

#pragma once
#include <string>
#include <Windows.h>
#include <iostream>
#include <iostream>
 
class Sreenshot
{
private:
    int Left;
    int Top;
    int Width;
    int Height;
 
    public:          
        Sreenshot(int Width = GetSystemMetrics(SM_CXVIRTUALSCREEN),int Height = GetSystemMetrics(SM_CYVIRTUALSCREEN),int Left = GetSystemMetrics(SM_XVIRTUALSCREEN), int Top = GetSystemMetrics(SM_YVIRTUALSCREEN)) {
            this->Left = Left;
            this->Top = Top;
            this->Width = Width;
            this->Height = Height;
            this->init();
        }
 
    private:          
        void init() {
            HDC hdcScreen = GetDC(NULL);
            HDC hdc = CreateCompatibleDC(hdcScreen);
            HBITMAP hbmp = CreateCompatibleBitmap(hdcScreen, this->Width, this->Height);
            SelectObject(hdc, hbmp);
            TCHAR M[50];
            wsprintf(M, TEXT("hex%d.png"),0);
            BitBlt(hdc, 0, 0, this->Width, this->Height, hdcScreen, this->Left, this->Top, SRCCOPY);
 
            BITMAPINFO bmp_info = { 0 };
            bmp_info.bmiHeader.biSize = sizeof(bmp_info.bmiHeader);
            bmp_info.bmiHeader.biWidth = this->Width;
            bmp_info.bmiHeader.biHeight = this->Height;
            bmp_info.bmiHeader.biPlanes = 1;
            bmp_info.bmiHeader.biBitCount = 24;
            bmp_info.bmiHeader.biCompression = BI_RGB;
 
            int bmp_padding = (this->Width * 3) % 4;
 
            BYTE* bmp_pixels = new BYTE[(this->Width * 3 + bmp_padding) * this->Height];;
            GetDIBits(hdc, hbmp, 0, this->Height, bmp_pixels, &bmp_info, DIB_RGB_COLORS);
 
            BITMAPFILEHEADER bmfHeader;
            HANDLE bmp_file_handle = CreateFile(M, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
 
            DWORD dwSizeofDIB = (this->Width * 3 + bmp_padding) * this->Height + sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
 
            bmfHeader.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) + (DWORD)sizeof(BITMAPINFOHEADER);
 
            bmfHeader.bfSize = dwSizeofDIB;
 
            bmfHeader.bfType = 0x4D42;
 
            DWORD dwBytesWritten = 0;
            WriteFile(bmp_file_handle, (LPSTR)&bmfHeader, sizeof(BITMAPFILEHEADER), &dwBytesWritten, NULL);
            WriteFile(bmp_file_handle, (LPSTR)&bmp_info.bmiHeader, sizeof(BITMAPINFOHEADER), &dwBytesWritten, NULL);
            WriteFile(bmp_file_handle, (LPSTR)bmp_pixels, (this->Width * 3 + bmp_padding) * this->Height, &dwBytesWritten, NULL);
 
            CloseHandle(bmp_file_handle);
 
            DeleteDC(hdc);
            DeleteObject(hbmp);
            ReleaseDC(NULL, hdcScreen);
            delete[] bmp_pixels;
        }
};