openpiv_cxx.windef.create_deformation_field

openpiv_cxx.windef.create_deformation_field(frame, x, y, u, v)

Create a deformation field

Deform an image by window deformation where a new grid is defined based on the grid and displacements of the previous pass and pixel values are interpolated onto the new grid.

Parameters:

• frame (ndarray) – A two dimensional array of integers containing grey levels of an image.

• x (ndarray) – A two dimensional array containing the x coordinates of the interrogation window centers, in pixels.

• y (ndarray) – A two dimensional array containing the y coordinates of the interrogation window centers, in pixels.

• u (ndarray) – A two dimensional array containing the u velocity component, in pixels/seconds.

• v (ndarray) – A two dimensional array containing the v velocity component, in pixels/seconds.

Returns:

• x, y (ndarray) – A new grid with same dimensions as frame

• u, v (ndarray) – Deformation field u/v components