Improved BOZ flat field

• adds low and high threshold on product and ratio of ROIs to calculate flat field correction
• adds default flat field guess for the fit as parameters
• implement hexagonal lattice for DSSC pixels
• breaks left/right symmetry for flat field fitting since zone plate can be slightly rotated
• implements a refine fit with regularization for flat field calculation
• implements dask auto rechunking

Closes #53 (closed) #55 (closed)

src/toolbox_scs/routines/boz.py

@@ -1246,7 +1246,7 @@ def nl_fit(params, domain):
     p0 = np.array([0]*N)
 
     # flat flat_field
-    ff = compute_flat_field_correction(params.rois, params.get_flat_field())
+    ff = compute_flat_field_correction(params.rois, params)
 
     fixed_p = (domain, params.nl_alpha, params.arr_dark, params.arr, params.tid,
         fitrois, params.get_mask(), ff, params.sat_level)