openpiv_cxx.process.get_coordinates

openpiv_cxx.process.get_coordinates(image_size, window_size=32, overlap=16)

Get x/y coordinates of vector field.

Compute the x, y coordinates of the centers of the interrogation windows. The origin (0,0) is like in the image, top left corner positive x is an increasing column index from left to right positive y is increasing row index, from top to bottom

Parameters:

  • image_size (tuple) – A two dimensional tuple for the pixel size of the image first element is number of rows, second element is the number of columns.

  • window_size (int) – The size of the (square) interrogation window.

  • overlap (int) – The number of pixel by which two adjacent interrogation windows overlap.

Returns:

  • 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.