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OpticalFlow

iris::optical_flow

Struct OpticalFlow 

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pub struct OpticalFlow;
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Optical Flow analyzer.

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impl OpticalFlow

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pub fn calc_dense_farneback<B: Backend>( prev: &Image<B>, next: &Image<B>, ) -> Result<Tensor<B, 3>>

Computes dense optical flow using Farneback’s algorithm. Returns flow tensor of shape [2, H, W] containing flow vectors (dx, dy).

Farneback’s method works by:

  1. Expanding each image into a quadratic polynomial using Gaussian weighting
  2. Computing the displacement field from the polynomial expansion coefficients
  3. Refining the flow iteratively at multiple scales
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pub fn calc_sparse_pyr_lk<B: Backend>( prev: &Image<B>, next: &Image<B>, prev_pts: &[Point<f64>], ) -> Result<(Vec<Point<f64>>, Vec<u8>)>

Computes sparse optical flow using Lucas-Kanade feature tracking. For each point in prev_pts, finds the corresponding location in the next frame by solving the Lucas-Kanade equations in a local window.

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