
"""simple docstring"""

class        _UpperCAmelCase							:




      def __init__(							self				,    lowercase_							)  ->   Any:
          UpperCAmelCase       =   data
          UpperCAmelCase       =   None
          UpperCAmelCase       =   None




      def __str__(							self							)  ->   Any:
          return F"{self.data}"

class        _UpperCAmelCase							:




      def __init__(							self							)  ->   str:
          UpperCAmelCase       =   None
          UpperCAmelCase       =   None




      def __iter__(							self							)  ->   Optional[Any]:
          UpperCAmelCase       =   self.head
          while node:
              yield node.data
              UpperCAmelCase       =   node.next




      def __str__(							self							)  ->   Dict:
          return "->".join([str(lowercase_							) for item in self]							)




      def __len__(							self							)  ->   Tuple:
          return sum(1 for _ in self							)




      def       a_ (							self				,    lowercase_							)  ->   Dict:
          self.insert_at_nth(0				,    lowercase_							)




      def       a_ (							self				,    lowercase_							)  ->   str:
          self.insert_at_nth(len(self							)				,    lowercase_							)




      def       a_ (							self				,    lowercase_				,    lowercase_							)  ->   Any:
          UpperCAmelCase       =   len(self							)

          if not 0 <= index <= length:
              raise IndexError('list index out of range'							)
          UpperCAmelCase       =   Node(lowercase_							)
          if self.head is None:
              UpperCAmelCase       =   UpperCAmelCase       =   new_node
          elif index == 0:
              UpperCAmelCase       =   new_node
              UpperCAmelCase       =   self.head
              UpperCAmelCase       =   new_node
          elif index == length:
              UpperCAmelCase       =   new_node
              UpperCAmelCase       =   self.tail
              UpperCAmelCase       =   new_node
          else:
              UpperCAmelCase       =   self.head
              for _ in range(0				,    lowercase_							):
                  UpperCAmelCase       =   temp.next
              UpperCAmelCase       =   new_node
              UpperCAmelCase       =   temp.previous
              UpperCAmelCase       =   temp
              UpperCAmelCase       =   new_node




      def       a_ (							self							)  ->   List[Any]:
          return self.delete_at_nth(0							)




      def       a_ (							self							)  ->   str:
          return self.delete_at_nth(len(self							) - 1							)




      def       a_ (							self				,    lowercase_							)  ->   int:
          UpperCAmelCase       =   len(self							)

          if not 0 <= index <= length - 1:
              raise IndexError('list index out of range'							)
          UpperCAmelCase       =   self.head  # default first node
          if length == 1:
              UpperCAmelCase       =   UpperCAmelCase       =   None
          elif index == 0:
              UpperCAmelCase       =   self.head.next
              UpperCAmelCase       =   None
          elif index == length - 1:
              UpperCAmelCase       =   self.tail
              UpperCAmelCase       =   self.tail.previous
              UpperCAmelCase       =   None
          else:
              UpperCAmelCase       =   self.head
              for _ in range(0				,    lowercase_							):
                  UpperCAmelCase       =   temp.next
              UpperCAmelCase       =   temp
              UpperCAmelCase       =   temp.previous
              UpperCAmelCase       =   temp.next
          return delete_node.data




      def       a_ (							self				,    lowercase_							)  ->   str:
          UpperCAmelCase       =   self.head

          while current.data != data:  # Find the position to delete
              if current.next:
                  UpperCAmelCase       =   current.next
              else:  # We have reached the end an no value matches
                  raise ValueError('No data matching given value'							)

          if current == self.head:
              self.delete_head()

          elif current == self.tail:
              self.delete_tail()

          else:  # Before: 1 <--> 2(current) <--> 3
              UpperCAmelCase       =   current.next  # 1 --> 3
              UpperCAmelCase       =   current.previous  # 1 <--> 3
          return data




      def       a_ (							self							)  ->   Tuple:
          return len(self							) == 0




def       lowercase__  (   )	-> None:






    """simple docstring"""




    UpperCAmelCase       =   DoublyLinkedList()
    assert linked_list.is_empty() is True
    assert str(lowerCAmelCase	) == ""

    try:
        linked_list.delete_head()
        raise AssertionError  # This should not happen.
    except IndexError:
        assert True  # This should happen.

    try:
        linked_list.delete_tail()
        raise AssertionError  # This should not happen.
    except IndexError:
        assert True  # This should happen.

    for i in range(10	):
        assert len(lowerCAmelCase	) == i
        linked_list.insert_at_nth(lowerCAmelCase	,			i + 1	)
    assert str(lowerCAmelCase	) == "->".join(str(lowerCAmelCase	) for i in range(1	,			11	)	)

    linked_list.insert_at_head(0	)
    linked_list.insert_at_tail(11	)
    assert str(lowerCAmelCase	) == "->".join(str(lowerCAmelCase	) for i in range(0	,			12	)	)

    assert linked_list.delete_head() == 0
    assert linked_list.delete_at_nth(9	) == 10
    assert linked_list.delete_tail() == 11
    assert len(lowerCAmelCase	) == 9
    assert str(lowerCAmelCase	) == "->".join(str(lowerCAmelCase	) for i in range(1	,			10	)	)


if __name__ == "__main__":
   from doctest import testmod

   testmod()





"""simple docstring"""

import cva
import numpy as np

from digital_image_processing.filters.convolve import img_convolve
from digital_image_processing.filters.sobel_filter import sobel_filter

SCREAMING_SNAKE_CASE_         =  180




def       lowercase__  (   lowerCAmelCase			:   str	,			lowerCAmelCase			:   List[Any]	)	-> Any:






    """simple docstring"""




    UpperCAmelCase       =   k_size // 2
    UpperCAmelCase     ,							UpperCAmelCase       =   np.mgrid[0 - center : k_size - center, 0 - center : k_size - center]
    UpperCAmelCase       =   (
        1
        / (2 * np.pi * sigma)
        * np.exp(-(np.square(lowerCAmelCase	) + np.square(lowerCAmelCase	)) / (2 * np.square(lowerCAmelCase	))	)
    )
    return g




def       lowercase__  (   lowerCAmelCase			:   int	,			lowerCAmelCase			:   List[str]	,			lowerCAmelCase			:   Union[str, Any]	)	-> List[Any]:






    """simple docstring"""




    UpperCAmelCase       =   np.zeros(lowerCAmelCase	)

    for row in range(1	,			image_shape[0] - 1	):
        for col in range(1	,			image_shape[1] - 1	):
            UpperCAmelCase       =   gradient_direction[row, col]

            if (
                0 <= direction < PI / 8
                or 15 * PI / 8 <= direction <= 2 * PI
                or 7 * PI / 8 <= direction <= 9 * PI / 8
            ):
                UpperCAmelCase       =   sobel_grad[row, col - 1]
                UpperCAmelCase       =   sobel_grad[row, col + 1]
                if sobel_grad[row, col] >= w and sobel_grad[row, col] >= e:
                    UpperCAmelCase       =   sobel_grad[row, col]

            elif (
                PI / 8 <= direction < 3 * PI / 8
                or 9 * PI / 8 <= direction < 11 * PI / 8
            ):
                UpperCAmelCase       =   sobel_grad[row + 1, col - 1]
                UpperCAmelCase       =   sobel_grad[row - 1, col + 1]
                if sobel_grad[row, col] >= sw and sobel_grad[row, col] >= ne:
                    UpperCAmelCase       =   sobel_grad[row, col]

            elif (
                3 * PI / 8 <= direction < 5 * PI / 8
                or 11 * PI / 8 <= direction < 13 * PI / 8
            ):
                UpperCAmelCase       =   sobel_grad[row - 1, col]
                UpperCAmelCase       =   sobel_grad[row + 1, col]
                if sobel_grad[row, col] >= n and sobel_grad[row, col] >= s:
                    UpperCAmelCase       =   sobel_grad[row, col]

            elif (
                5 * PI / 8 <= direction < 7 * PI / 8
                or 13 * PI / 8 <= direction < 15 * PI / 8
            ):
                UpperCAmelCase       =   sobel_grad[row - 1, col - 1]
                UpperCAmelCase       =   sobel_grad[row + 1, col + 1]
                if sobel_grad[row, col] >= nw and sobel_grad[row, col] >= se:
                    UpperCAmelCase       =   sobel_grad[row, col]

    return destination




def       lowercase__  (   lowerCAmelCase			:   List[str]	,			lowerCAmelCase			:   Any	,			lowerCAmelCase			:   Union[str, Any]	,			lowerCAmelCase			:   List[str]	,			lowerCAmelCase			:   Any	,			lowerCAmelCase			:   List[str]	)	-> Any:






    """simple docstring"""




    for row in range(1	,			image_shape[0] - 1	):
        for col in range(1	,			image_shape[1] - 1	):
            if destination[row, col] >= threshold_high:
                UpperCAmelCase       =   strong
            elif destination[row, col] <= threshold_low:
                UpperCAmelCase       =   0
            else:
                UpperCAmelCase       =   weak




def       lowercase__  (   lowerCAmelCase			:   List[str]	,			lowerCAmelCase			:   Union[str, Any]	,			lowerCAmelCase			:   Tuple	,			lowerCAmelCase			:   Dict	)	-> List[str]:






    """simple docstring"""




    for row in range(1	,			image_shape[0]	):
        for col in range(1	,			image_shape[1]	):
            if destination[row, col] == weak:
                if 255 in (
                    destination[row, col + 1],
                    destination[row, col - 1],
                    destination[row - 1, col],
                    destination[row + 1, col],
                    destination[row - 1, col - 1],
                    destination[row + 1, col - 1],
                    destination[row - 1, col + 1],
                    destination[row + 1, col + 1],
                ):
                    UpperCAmelCase       =   strong
                else:
                    UpperCAmelCase       =   0




def       lowercase__  (   lowerCAmelCase			:   Optional[Any]	,			lowerCAmelCase			:   int=15	,			lowerCAmelCase			:   Dict=30	,			lowerCAmelCase			:   str=128	,			lowerCAmelCase			:   Optional[Any]=255	)	-> Union[str, Any]:






    """simple docstring"""




    UpperCAmelCase       =   img_convolve(lowerCAmelCase	,			gen_gaussian_kernel(9	,			sigma=1.4	)	)
    # get the gradient and degree by sobel_filter
    UpperCAmelCase     ,							UpperCAmelCase       =   sobel_filter(lowerCAmelCase	)
    UpperCAmelCase       =   PI + np.radadeg(lowerCAmelCase	)

    UpperCAmelCase       =   suppress_non_maximum(image.shape	,			lowerCAmelCase	,			lowerCAmelCase	)

    detect_high_low_threshold(
        image.shape	,			lowerCAmelCase	,			lowerCAmelCase	,			lowerCAmelCase	,			lowerCAmelCase	,			lowerCAmelCase	)

    track_edge(image.shape	,			lowerCAmelCase	,			lowerCAmelCase	,			lowerCAmelCase	)

    return destination


if __name__ == "__main__":
   # read original image in gray mode
   SCREAMING_SNAKE_CASE_         =  cva.imread(r'''../image_data/lena.jpg''', 0)
   # canny edge detection
   SCREAMING_SNAKE_CASE_         =  canny(lena)
   cva.imshow('''canny''', canny_destination)
   cva.waitKey(0)



