opencv-python cv2.flip 图像翻转

 cv2.flip  图像翻转

来看下函数介绍

docstring:
flip(src, flipCode[, dst]) -> dst
.   @brief Flips a 2D array around vertical, horizontal, or both axes.

 The example scenarios of using the function are the following:
.   *   Vertical flipping of the image (flipCode == 0) to switch between
.   top-left and bottom-left image origin. This is a typical operation
.   in video processing on Microsoft Windows\* OS.
.   *   Horizontal flipping of the image with the subsequent horizontal
.   shift and absolute difference calculation to check for a
.   vertical-axis symmetry (flipCode \> 0).
.   *   Simultaneous horizontal and vertical flipping of the image with
.   the subsequent shift and absolute difference calculation to check
.   for a central symmetry (flipCode \< 0).
.   *   Reversing the order of point arrays (flipCode \> 0 or
.   flipCode == 0).
.   @param src input array.
.   @param dst output array of the sa