image flip transformation

//图片翻转
void COpenCVTestDlg::OnCbnSelchangeComboFlip()
{
       if (m_comboFlip.GetCurSel() == -1)
              return;
       if (!m_srcMatImg.empty())
       {
              CString szFlip;
              m_comboFlip.GetLBText(m_comboFlip.GetCurSel(), szFlip);
              if (szFlip == L"水平翻转")
              {
                     //水平方向翻转 参数值为1   参数>0位水平翻转
                     cv::flip(m_srcMatImg, m_dstMatImg, 1);
              }
              else if (szFlip == L"垂直翻转")
              {
                     //垂直方向翻转 参数值为0 参数=0位垂直翻转
                     cv::flip(m_srcMatImg, m_dstMatImg, 0);
              }
              else
              {
                     //水平和垂直方向同时翻转 参数值为-1 参数<0位水平垂直翻转
                     cv::flip(m_srcMatImg, m_dstMatImg, -1);
              }
       }
}

void flip(InputArray src, OutputArray dst, int flipCode);

    src: is the original image to process

    dst: is the target image with the same size and type as the original image

    flipCode: is the rotation type

        =0, flip the x-axis direction

        >0, the y-axis direction is flipped

        <0, the x-axis and y-axis are flipped at the same time

    In this function, the relationship between the target pixel and the original pixel is expressed as:

        

Y方向翻转
cv::flip(m_srcImage, m_dstImage, 1);
X方向翻转
cv::flip(m_srcImage, m_dstImage, 0);
XY两方向翻转
cv::flip(m_srcImage, m_dstImage, -1);

original image

flip

There are also flip transformations written by themselves, please pay attention to the public account "Qt Learning Vision"