Process

Grid generation

get_field_shape(image_size, window_size, overlap)	Get vector field shape.
get_coordinates(image_size[, window_size, ...])	Get x/y coordinates of vector field.
get_rect_coordinates(image_size[, ...])	Same as get_coordinates, except for rectangualr windows.

PIV processing

fft_correlate_images(image_a, image_b[, ...])	Standard FFT based cross-correlation of two images.
correlation_to_displacement(corr[, n_rows, ...])	Standard subpixel estimation.