opencv_learning

1 flip

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

• flipCode:a flag to specify how to flip the array; 0 means flipping around the x-axis and positive value (for example, 1) means flipping around y-axis. Negative value (for example, -1) means flipping around both axes (see the discussion below for the formulas).
  • 0: x轴翻转，图像显示上下翻转
  • 1: y轴翻转，图像显示左右翻转
  • -1: x,y翻转，图像上下左右翻转