


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__       			=				1_8_0




def SCREAMING_SNAKE_CASE_  (				__lowerCamelCase:		List[Any]  ,			__lowerCamelCase:		int  ):







	'''simple docstring'''



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




def SCREAMING_SNAKE_CASE_  (				__lowerCamelCase:		List[str]  ,			__lowerCamelCase:		Tuple  ,			__lowerCamelCase:		Optional[Any]  ):







	'''simple docstring'''



	lowercase_			 = np.zeros(__SCREAMING_SNAKE_CASE  )

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

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

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

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

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

	return destination




def SCREAMING_SNAKE_CASE_  (				__lowerCamelCase:		Tuple  ,			__lowerCamelCase:		List[str]  ,			__lowerCamelCase:		Tuple  ,			__lowerCamelCase:		Union[str, Any]  ,			__lowerCamelCase:		Dict  ,			__lowerCamelCase:		List[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:
				lowercase_			 = strong
			elif destination[row, col] <= threshold_low:
				lowercase_			 = 0
			else:
				lowercase_			 = weak




def SCREAMING_SNAKE_CASE_  (				__lowerCamelCase:		List[Any]  ,			__lowerCamelCase:		Optional[int]  ,			__lowerCamelCase:		Optional[int]  ,			__lowerCamelCase:		Union[str, Any]  ):







	'''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],
				):
					lowercase_			 = strong
				else:
					lowercase_			 = 0




def SCREAMING_SNAKE_CASE_  (				__lowerCamelCase:		List[str]  ,			__lowerCamelCase:		int=15  ,			__lowerCamelCase:		int=30  ,			__lowerCamelCase:		Tuple=128  ,			__lowerCamelCase:		List[Any]=255  ):







	'''simple docstring'''



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

	lowercase_			 = suppress_non_maximum(image.shape  ,			__SCREAMING_SNAKE_CASE  ,			__SCREAMING_SNAKE_CASE  )

	detect_high_low_threshold(
	    image.shape  ,			__SCREAMING_SNAKE_CASE  ,			__SCREAMING_SNAKE_CASE  ,			__SCREAMING_SNAKE_CASE  ,			__SCREAMING_SNAKE_CASE  ,			__SCREAMING_SNAKE_CASE  )

	track_edge(image.shape  ,			__SCREAMING_SNAKE_CASE  ,			__SCREAMING_SNAKE_CASE  ,			__SCREAMING_SNAKE_CASE  )

	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)



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

_UpperCamelCase:					Tuple     =180



def 	_a  (					__SCREAMING_SNAKE_CASE					:  List[Any]		,				__SCREAMING_SNAKE_CASE					:  int    ):






  """simple docstring"""




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



def 	_a  (					__SCREAMING_SNAKE_CASE					:  List[str]		,				__SCREAMING_SNAKE_CASE					:  Tuple		,				__SCREAMING_SNAKE_CASE					:  Optional[Any]    ):






  """simple docstring"""




  _lowerCAmelCase						=		np.zeros(__SCREAMING_SNAKE_CASE    )

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

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

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

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

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

  return destination



def 	_a  (					__SCREAMING_SNAKE_CASE					:  Tuple		,				__SCREAMING_SNAKE_CASE					:  List[str]		,				__SCREAMING_SNAKE_CASE					:  Tuple		,				__SCREAMING_SNAKE_CASE					:  Union[str, Any]		,				__SCREAMING_SNAKE_CASE					:  Dict		,				__SCREAMING_SNAKE_CASE					:  List[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:
        _lowerCAmelCase						=		strong
      elif destination[row, col] <= threshold_low:
        _lowerCAmelCase						=		0
      else:
        _lowerCAmelCase						=		weak



def 	_a  (					__SCREAMING_SNAKE_CASE					:  List[Any]		,				__SCREAMING_SNAKE_CASE					:  Optional[int]		,				__SCREAMING_SNAKE_CASE					:  Optional[int]		,				__SCREAMING_SNAKE_CASE					:  Union[str, Any]    ):






  """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],
        ):
          _lowerCAmelCase						=		strong
        else:
          _lowerCAmelCase						=		0



def 	_a  (					__SCREAMING_SNAKE_CASE					:  List[str]		,				__SCREAMING_SNAKE_CASE					:  int=15		,				__SCREAMING_SNAKE_CASE					:  int=30		,				__SCREAMING_SNAKE_CASE					:  Tuple=128		,				__SCREAMING_SNAKE_CASE					:  List[Any]=255    ):






  """simple docstring"""




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

  _lowerCAmelCase						=		suppress_non_maximum(image.shape		,				__SCREAMING_SNAKE_CASE		,				__SCREAMING_SNAKE_CASE    )

  detect_high_low_threshold(
      image.shape		,				__SCREAMING_SNAKE_CASE		,				__SCREAMING_SNAKE_CASE		,				__SCREAMING_SNAKE_CASE		,				__SCREAMING_SNAKE_CASE		,				__SCREAMING_SNAKE_CASE    )

  track_edge(image.shape		,				__SCREAMING_SNAKE_CASE		,				__SCREAMING_SNAKE_CASE		,				__SCREAMING_SNAKE_CASE    )

  return destination


if __name__ == "__main__":
       # read original image in gray mode
       _UpperCamelCase:					Optional[Any]     =cva.imread(R'../image_data/lena.jpg', 0)
       # canny edge detection
       _UpperCamelCase:					Tuple     =canny(lena)
       cva.imshow('canny', canny_destination)
       cva.waitKey(0)
