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

from digital_image_processing.filters.convolve import img_convolve




def 					lowerCamelCase__					(    a__	:	Optional[int]  )		->						Dict:
       UpperCamelCase_											=							np.array([[-1, 0, 1], [-2, 0, 2], [-1, 0, 1]]  )
       UpperCamelCase_											=							np.array([[1, 2, 1], [0, 0, 0], [-1, -2, -1]]  )

       UpperCamelCase_											=							np.abs(img_convolve(a__						,   a__  )  )
       UpperCamelCase_											=							np.abs(img_convolve(a__						,   a__  )  )
       # modify the pix within [0, 255]
       UpperCamelCase_											=							dst_x * 255 / np.max(a__  )
       UpperCamelCase_											=							dst_y * 255 / np.max(a__  )

       UpperCamelCase_											=							np.sqrt((np.square(a__  )) + (np.square(a__  ))  )
       UpperCamelCase_											=							dst_xy * 255 / np.max(a__  )
       UpperCamelCase_											=							dst_xy.astype(np.uinta  )

       UpperCamelCase_											=							np.arctana(a__						,   a__  )
       return dst, theta


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

      _A							=       sobel_filter(gray)

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





"""simple docstring"""




def __snake_case (      UpperCamelCase    )       ->    float:


		"""simple docstring"""





		return -num if num < 0 else num

def __snake_case (      UpperCamelCase    )       ->    int:


		"""simple docstring"""





		if len(UpperCamelCase    ) == 0:
				raise ValueError('''abs_min() arg is an empty sequence'''    )
		a__   		=     x[0]
		for i in x:
				if abs_val(UpperCamelCase    ) < abs_val(UpperCamelCase    ):
						a__   		=     i
		return j

def __snake_case (      UpperCamelCase    )       ->    int:


		"""simple docstring"""





		if len(UpperCamelCase    ) == 0:
				raise ValueError('''abs_max() arg is an empty sequence'''    )
		a__   		=     x[0]
		for i in x:
				if abs(UpperCamelCase    ) > abs(UpperCamelCase    ):
						a__   		=     i
		return j

def __snake_case (      UpperCamelCase    )       ->    int:


		"""simple docstring"""





		if len(UpperCamelCase    ) == 0:
				raise ValueError('''abs_max_sort() arg is an empty sequence'''    )
		return sorted(UpperCamelCase						,					key=UpperCamelCase    )[-1]

def __snake_case (      )       ->    Optional[int]:


		"""simple docstring"""





		assert abs_val(0    ) == 0
		assert abs_val(34    ) == 34
		assert abs_val(-100_000_000_000    ) == 100_000_000_000

		a__   		=     [-3, -1, 2, -11]
		assert abs_max(UpperCamelCase    ) == -11
		assert abs_max_sort(UpperCamelCase    ) == -11
		assert abs_min(UpperCamelCase    ) == -1


if __name__ == "__main__":
					import doctest

					doctest.testmod()

					test_abs_val()
					print(abs_val(-34))  # --> 34




