


"""simple docstring"""






import numpy as np
from PIL import Image


def __lowercase  (   lowerCamelCase_	:   np.array	):
				SCREAMING_SNAKE_CASE__				,   SCREAMING_SNAKE_CASE__				,   SCREAMING_SNAKE_CASE__  				=					rgb[:, :, 0], rgb[:, :, 1], rgb[:, :, 2]
				return 0.2989 * r + 0.5870 * g + 0.1140 * b


def __lowercase  (   lowerCamelCase_	:   np.array	):
				return (gray > 127) & (gray <= 255)


def __lowercase  (   lowerCamelCase_	:   np.array    ,       lowerCamelCase_	:   np.array	):
				SCREAMING_SNAKE_CASE__  				=					np.zeros_like(lowerCamelCase_	)
				SCREAMING_SNAKE_CASE__  				=					np.zeros(
				    (image.shape[0] + kernel.shape[0] - 1, image.shape[1] + kernel.shape[1] - 1)	)

				# Copy image to padded image
				SCREAMING_SNAKE_CASE__  				=					image

				# Iterate over image & apply kernel
				for x in range(image.shape[1]	):
								for y in range(image.shape[0]	):
												SCREAMING_SNAKE_CASE__  				=					(
												    kernel * image_padded[y : y + kernel.shape[0], x : x + kernel.shape[1]]
												).sum()
												SCREAMING_SNAKE_CASE__  				=					int(summation == 5	)
				return output


# kernel to be applied
_lowerCamelCase  =	np.array([[0, 1, 0], [1, 1, 1], [0, 1, 0]])

if __name__ == "__main__":
	# read original image
	_lowerCamelCase  =	np.array(Image.open(R'..\image_data\lena.jpg'))
	# Apply erosion operation to a binary image
	_lowerCamelCase  =	erosion(grayabinary(rgbagray(image)), structuring_element)
	# Save the output image
	_lowerCamelCase  =	Image.fromarray(output).convert('RGB')
	pil_img.save('result_erosion.png')




"""simple docstring"""






def __lowercase  (   lowerCamelCase_	:   list	):
				if not isinstance(lowerCamelCase_    ,       lowerCamelCase_	):
								raise ValueError("Input series is not valid, valid series - [2, 4, 8]"	)
				if len(lowerCamelCase_	) == 0:
								raise ValueError("Input list must be a non empty list"	)
				if len(lowerCamelCase_	) == 1:
								return True
				try:
								SCREAMING_SNAKE_CASE__  				=					series[1] / series[0]
								for index in range(len(lowerCamelCase_	) - 1	):
												if series[index + 1] / series[index] != common_ratio:
																return False
				except ZeroDivisionError:
								return False
				return True


def __lowercase  (   lowerCamelCase_	:   list	):
				if not isinstance(lowerCamelCase_    ,       lowerCamelCase_	):
								raise ValueError("Input series is not valid, valid series - [2, 4, 8]"	)
				if len(lowerCamelCase_	) == 0:
								raise ValueError("Input list must be a non empty list"	)
				SCREAMING_SNAKE_CASE__  				=					1
				for value in series:
								answer *= value
				return pow(lowerCamelCase_    ,       1 / len(lowerCamelCase_	)	)


if __name__ == "__main__":
	import doctest

	doctest.testmod()
