
"""simple docstring"""




import numpy as np
from cva import COLOR_BGR2GRAY, cvtColor, imread, imshow, waitKey

from digital_image_processing.filters.convolve import img_convolve

def     UpperCamelCase_    (						SCREAMING_SNAKE_CASE_     ):
					SCREAMING_SNAKE_CASE           =      np.array([[-1, 0, 1], [-2, 0, 2], [-1, 0, 1]]     )
					SCREAMING_SNAKE_CASE           =      np.array([[1, 2, 1], [0, 0, 0], [-1, -2, -1]]     )

					SCREAMING_SNAKE_CASE           =      np.abs(img_convolve(a_,	a_     )     )
					SCREAMING_SNAKE_CASE           =      np.abs(img_convolve(a_,	a_     )     )
					# modify the pix within [0, 255]
					SCREAMING_SNAKE_CASE           =      dst_x * 2_5_5 / np.max(a_     )
					SCREAMING_SNAKE_CASE           =      dst_y * 2_5_5 / np.max(a_     )

					SCREAMING_SNAKE_CASE           =      np.sqrt((np.square(a_     )) + (np.square(a_     ))     )
					SCREAMING_SNAKE_CASE           =      dst_xy * 2_5_5 / np.max(a_     )
					SCREAMING_SNAKE_CASE           =      dst_xy.astype(np.uinta     )

					SCREAMING_SNAKE_CASE           =      np.arctana(a_,	a_     )
					return dst, theta


if __name__ == "__main__":
	# read original image
	snake_case					  =						imread('../image_data/lena.jpg')
	# turn image in gray scale value
	snake_case					  =						cvtColor(img, COLOR_BGR2GRAY)

	snake_case  ,     snake_case					  =						sobel_filter(gray)

	# show result images
	imshow('sobel filter', sobel_grad)
	imshow('sobel theta', sobel_theta)
	waitKey(0)


"""simple docstring"""







def       __UpperCAmelCase		(		a_      :		list[list[int]]					)  ->							bool:
   # must be
   _UpperCAmelCase 						=       [list(a_					) for row in matrix]
   if matrix and isinstance(a_     ,	a_					):
      if isinstance(matrix[0]     ,	a_					):
         _UpperCAmelCase 						=       0
         for row in matrix:
            if prev_len == 0:
               _UpperCAmelCase 						=       len(a_					)
               _UpperCAmelCase 						=       True
            else:
               _UpperCAmelCase 						=       prev_len == len(a_					)
      else:
         _UpperCAmelCase 						=       True
   else:
      _UpperCAmelCase 						=       False

   return result
def       __UpperCAmelCase		(		a_      :		list[list[int]]					)  ->							None:
   if check_matrix(a_					) and len(a_					) > 0:
      _UpperCAmelCase 						=       [list(a_					) for row in a]
      _UpperCAmelCase 						=       len(a_					)
      if isinstance(a[0]     ,	a_					):
         _UpperCAmelCase 						=       len(a[0]					)
      else:
         for dat in a:
            print(a_					)
         return

      # horizotal printing increasing
      for i in range(0     ,	a_					):
         print(a[0][i]					)
      # vertical printing down
      for i in range(1     ,	a_					):
         print(a[i][mat_col - 1]					)
      # horizotal printing decreasing
      if mat_row > 1:
         for i in range(mat_col - 2     ,	-1     ,	-1					):
            print(a[mat_row - 1][i]					)
        # vertical printing up
      for i in range(mat_row - 2     ,	0     ,	-1					):
         print(a[i][0]					)
      _UpperCAmelCase 						=       [row[1 : mat_col - 1] for row in a[1 : mat_row - 1]]
      if len(a_					) > 0:
         spiral_print_clockwise(a_					)
      else:
         return
   else:
      print("Not a valid matrix"					)
      return
def       __UpperCAmelCase		(		a_      :		list[list]					)  ->							list[int]:
   if matrix:
      return list(matrix.pop(0					)					) + spiral_traversal(list(zip(*a_					)					)[::-1]					)
   else:
      return []


# driver code
if __name__ == "__main__":
  import doctest

  doctest.testmod()

  SCREAMING_SNAKE_CASE_  					= [[1, 2, 3, 4], [5, 6, 7, 8], [9, 10, 11, 12]]
  spiral_print_clockwise(a)

