[−][src]Function opencv::video::build_optical_flow_pyramid

pub fn build_optical_flow_pyramid(
    img: &dyn ToInputArray, 
    pyramid: &mut dyn ToOutputArray, 
    win_size: Size, 
    max_level: i32, 
    with_derivatives: bool, 
    pyr_border: i32, 
    deriv_border: i32, 
    try_reuse_input_image: bool
) -> Result<i32>

Constructs the image pyramid which can be passed to calcOpticalFlowPyrLK.

Parameters

  • img: 8-bit input image.
  • pyramid: output pyramid.
  • winSize: window size of optical flow algorithm. Must be not less than winSize argument of calcOpticalFlowPyrLK. It is needed to calculate required padding for pyramid levels.
  • maxLevel: 0-based maximal pyramid level number.
  • withDerivatives: set to precompute gradients for the every pyramid level. If pyramid is constructed without the gradients then calcOpticalFlowPyrLK will calculate them internally.
  • pyrBorder: the border mode for pyramid layers.
  • derivBorder: the border mode for gradients.
  • tryReuseInputImage: put ROI of input image into the pyramid if possible. You can pass false to force data copying.

Returns

number of levels in constructed pyramid. Can be less than maxLevel.

C++ default parameters

  • with_derivatives: true
  • pyr_border: BORDER_REFLECT_101
  • deriv_border: BORDER_CONSTANT
  • try_reuse_input_image: true