Converts pixel positions to radius from the calibrated center
shape : tuple
The shape of the image (nrow, ncol) to warp the coordinates of
calibrated_center : tuple
The center in pixels-units (row, col)
pixel_size : tuple, optional
The size of a pixel (really the pitch) in real units. (height, width). Defaults to 1 pixel/pixel if not specified.
The size of a pixel (really the pitch) in real units. (height, width).
Defaults to 1 pixel/pixel if not specified.
R : array
The L2 norm of the distance of each pixel from the calibrated center.