Implementation of caking.
scr_data : ndarray
The source-data to be integrated
center : ndarray
The center of the ring in pixels
theta_start : float
The angle of the start of the wedge from the image y-axis in degrees
delta_theta : float
The angular width of the wedge in degrees. Positive angles go clockwise, negative go counter-clockwise.
r_inner : float
The inner radius in pixel units, Must be non-negative
delta_r : float
The length of the wedge in the radial direction in pixel units. Must be non-negative
float :
The integrated intensity under the wedge