Function flip

pub fn flip(
    src: &impl ToInputArray,
    dst: &mut impl ToOutputArray,
    flip_code: i32,
) -> Result<()>

Flips a 2D array around vertical, horizontal, or both axes.

The function cv::flip flips the array in one of three different ways (row and column indices are 0-based): 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).

Parameters

• src: input array.
• dst: output array of the same size and type as src.
• 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 also

transpose, repeat, completeSymm