

from cva import COLOR_BGR2GRAY, cvtColor, imread, imshow, waitKey
from numpy import array, dot, pad, ravel, uinta, zeros







def     A_   (					_UpperCAmelCase       ,			_UpperCAmelCase					):
						SCREAMING_SNAKE_CASE_	,					SCREAMING_SNAKE_CASE_:				Optional[int]							= image.shape
						SCREAMING_SNAKE_CASE_:				Dict							= cols - block_size[1] + 1
						SCREAMING_SNAKE_CASE_:				List[str]							= rows - block_size[0] + 1
						SCREAMING_SNAKE_CASE_:				int							= zeros((dst_height * dst_width, block_size[1] * block_size[0])					)
						SCREAMING_SNAKE_CASE_:				Any							= 0
						for i in range(0       ,			_UpperCAmelCase					):
												for j in range(0       ,			_UpperCAmelCase					):
																		SCREAMING_SNAKE_CASE_:				Optional[int]							= ravel(image[i : i + block_size[0], j : j + block_size[1]]					)
																		SCREAMING_SNAKE_CASE_:				Tuple							= window
																		row += 1

						return image_array







def     A_   (					_UpperCAmelCase       ,			_UpperCAmelCase					):
						SCREAMING_SNAKE_CASE_	,					SCREAMING_SNAKE_CASE_:				Dict							= image.shape[0], image.shape[1]
						SCREAMING_SNAKE_CASE_:				Tuple							= filter_kernel.shape[0]
						SCREAMING_SNAKE_CASE_:				int							= k_size // 2
						# Pads image with the edge values of array.
						SCREAMING_SNAKE_CASE_:				str							= pad(_UpperCAmelCase       ,			_UpperCAmelCase       ,			mode="edge"					)

						# im2col, turn the k_size*k_size pixels into a row and np.vstack all rows
						SCREAMING_SNAKE_CASE_:				int							= imacol(_UpperCAmelCase       ,			(k_size, k_size)					)

						#  turn the kernel into shape(k*k, 1)
						SCREAMING_SNAKE_CASE_:				List[Any]							= ravel(_UpperCAmelCase					)
						# reshape and get the dst image
						SCREAMING_SNAKE_CASE_:				Tuple							= dot(_UpperCAmelCase       ,			_UpperCAmelCase					).reshape(_UpperCAmelCase       ,			_UpperCAmelCase					)
						return dst


if __name__ == "__main__":
						# read original image
						lowerCAmelCase							:						Union[str, Any]     			=		imread(R"""../image_data/lena.jpg""")
						# turn image in gray scale value
						lowerCAmelCase							:						List[Any]     			=		cvtColor(img, COLOR_BGR2GRAY)
						# Laplace operator
						lowerCAmelCase							:						int     			=		array([[0, 1, 0], [1, -4, 1], [0, 1, 0]])
						lowerCAmelCase							:						str     			=		img_convolve(gray, Laplace_kernel).astype(uinta)
						imshow("""Laplacian""", out)
						waitKey(0)









import heapq







def     A_   (					_UpperCAmelCase       ,			_UpperCAmelCase       ,			_UpperCAmelCase					):
						SCREAMING_SNAKE_CASE_:				List[Any]							= [(0, start)]  # cost from start node,end node
						SCREAMING_SNAKE_CASE_:				Any							= set()
						while heap:
												((SCREAMING_SNAKE_CASE_)	,					(SCREAMING_SNAKE_CASE_)):				Tuple							= heapq.heappop(_UpperCAmelCase					)
												if u in visited:
																		continue
												visited.add(_UpperCAmelCase					)
												if u == end:
																		return cost
												for v, c in graph[u]:
																		if v in visited:
																								continue
																		SCREAMING_SNAKE_CASE_:				List[str]							= cost + c
																		heapq.heappush(_UpperCAmelCase       ,			(next_item, v)					)
						return -1


lowerCAmelCase							:						Optional[Any]     			=		{
    """A""": [["""B""", 2], ["""C""", 5]],
    """B""": [["""A""", 2], ["""D""", 3], ["""E""", 1], ["""F""", 1]],
    """C""": [["""A""", 5], ["""F""", 3]],
    """D""": [["""B""", 3]],
    """E""": [["""B""", 4], ["""F""", 3]],
    """F""": [["""C""", 3], ["""E""", 3]],
}
lowerCAmelCase							:						Tuple     			=		{
    """B""": [["""C""", 1]],
    """C""": [["""D""", 1]],
    """D""": [["""F""", 1]],
    """E""": [["""B""", 1], ["""F""", 3]],
    """F""": [],
}
lowerCAmelCase							:						str     			=		{
    """B""": [["""C""", 1]],
    """C""": [["""D""", 1]],
    """D""": [["""F""", 1]],
    """E""": [["""B""", 1], ["""G""", 2]],
    """F""": [],
    """G""": [["""F""", 1]],
}

lowerCAmelCase							:						Union[str, Any]     			=		dijkstra(G, """E""", """C""")
print(short_distance)  # E -- 3 --> F -- 3 --> C == 6

lowerCAmelCase							:						Tuple     			=		dijkstra(Ga, """E""", """F""")
print(short_distance)  # E -- 3 --> F == 3

lowerCAmelCase							:						Union[str, Any]     			=		dijkstra(Ga, """E""", """F""")
print(short_distance)  # E -- 2 --> G -- 1 --> F == 3

if __name__ == "__main__":
						import doctest

						doctest.testmod()






