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

@@ -284,21 +284,28 @@ def _get_pixel_hexagons(module):
     
     Parameters:
     -----------
-    module: int, module number
+    module: either int, for the module number or a 2-d array of corners to
+        get hexagons from
 
     Returns:
-    a list of hexagons
+    --------
+    a 1-d list of hexagons where corners position are in mm
     """
     hexes = []
     
-    corners = _get_pixel_corners(module)
-    for y in range(128):
-        for x in range(512):
+    if type(module) is int:
+        corners = _get_pixel_corners(module)
+    else:
+        corners = module
+
+    for y in range(corners.shape[0]):
+        for x in range(corners.shape[1]):
             c = 1e3*corners[y, x, :, :] # convert to mm
             hexes.append(Polygon(c))
 
     return hexes
 
+
 def _add_colorbar(im, ax, loc='right', size='5%', pad=0.05):
     """Add a colobar on a new axes so it match the plot size.