utils: raspberrypi: ctt: Fix pycodestyle E305

E305 expected 2 blank lines after class or function definition

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: David Plowman <david.plowman@raspberrypi.com>

utils/raspberrypi/ctt/ctt.py

@@ -60,6 +60,7 @@ def get_col_lux(string):
         return col, None
     return int(col), int(lux)
 
+
 """
 Camera object that is the backbone of the tuning tool.
 Input is the desired path of the output json.
@@ -797,6 +798,7 @@ def run_ctt(json_output, directory, config, log_output):
     else:
         Cam.write_log(log_output)
 
+
 if __name__ == '__main__':
     """
     initialise calibration

utils/raspberrypi/ctt/ctt_alsc.py

@@ -218,6 +218,7 @@ def get_16x12_grid(chan, dx, dy):
     """
     return np.array(grid)
 
+
 """
 obtains sigmas for red and blue, effectively a measure of the 'error'
 """
@@ -257,6 +258,7 @@ def get_sigma(Cam, cal_cr_list, cal_cb_list):
     # print(sigma_r, sigma_b)
     return sigma_r, sigma_b
 
+
 """
 calculate sigma from two adjacent gain tables
 """

utils/raspberrypi/ctt/ctt_awb.py

@@ -288,6 +288,7 @@ def awb(Cam, cal_cr_list, cal_cb_list, plot):
     """
     return(ct_curve, np.round(transverse_pos, 5), np.round(transverse_neg, 5))
 
+
 """
 obtain greyscale patches and perform alsc colour correction
 """

utils/raspberrypi/ctt/ctt_ccm.py

@@ -16,6 +16,7 @@ def degamma(x):
     x = x * ((2**16)-1)
     return x
 
+
 """
 FInds colour correction matrices for list of images
 """
@@ -153,6 +154,7 @@ def ccm(Cam, cal_cr_list, cal_cb_list):
         })
     return ccms
 
+
 """
 calculates the ccm for an individual image.
 ccms are calculate in rgb space, and are fit by hand. Although it is a 3x3

utils/raspberrypi/ctt/ctt_geq.py

@@ -165,6 +165,7 @@ def geq_fit(Cam, plot):
 
     return round(slope, 5), int(offset)
 
+
 """"
 Return green channels of macbeth patches
 returns g0, g1 where

utils/raspberrypi/ctt/ctt_image_load.py

@@ -418,6 +418,7 @@ def load_image(Cam, im_str, mac_config=None, show=False, mac=True, show_meta=Fal
         # print('\nERROR:\nInvalid file extension')
         return 0
 
+
 """
 bytearray splice to number little endian
 """

utils/raspberrypi/ctt/ctt_lux.py

@@ -19,6 +19,7 @@ def lux(Cam, Img):
     channels = [Img.channels[i] for i in Img.order]
     return lux_calc(Cam, Img, patches, channels), shutter_speed, gain
 
+
 """
 perform lux calibration on bayer channels
 """

utils/raspberrypi/ctt/ctt_macbeth_locator.py

@@ -21,6 +21,7 @@ output to the console
 def fxn():
     warnings.warn("runtime", RuntimeWarning)
 
+
 """
 Define the success message
 """

utils/raspberrypi/ctt/ctt_tools.py

@@ -48,6 +48,8 @@ def get_config(dictt, key, default, ttype):
     except (KeyError, ValueError):
         val = default
     return val
+
+
 """
 argument parser
 """
@@ -67,6 +69,8 @@ def parse_input():
     if json_output is None:
         raise ArgError('\n\nERROR! No output json given.')
     return json_output, directory, config, log_path
+
+
 """
 custom arg and macbeth error class
 """
@@ -75,6 +79,7 @@ class ArgError(Exception):
 class MacbethError(Exception):
     pass
 
+
 """
 correlation function to quantify match
 """
@@ -84,6 +89,7 @@ def correlate(im1, im2):
     cor = np.corrcoef(f1, f2)
     return cor[0][1]
 
+
 """
 get list of files from directory
 """
@@ -94,6 +100,7 @@ def get_photos(directory='photos'):
             filename_list.append(filename)
     return filename_list
 
+
 """
 display image for debugging... read at your own risk...
 """