
'''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

A           =   1_8_0

def   snake_case_       (							_a     :							Optional[Any] ,					_a     :							Optional[int]			):
      snake_case_						       =							k_size // 2
      snake_case_       ,	snake_case_						       =							np.mgrid[0 - center : k_size - center, 0 - center : k_size - center]
      snake_case_						       =							(
          1
          / (2 * np.pi * sigma)
          * np.exp(-(np.square(UpperCamelCase__			) + np.square(UpperCamelCase__			)) / (2 * np.square(UpperCamelCase__			))			)
      )
      return g

def   snake_case_       (							_a     :							Any ,					_a     :							Optional[int] ,					_a     :							List[str]			):
      snake_case_						       =							np.zeros(UpperCamelCase__			)

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

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

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

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

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

      return destination

def   snake_case_       (							_a     :							List[str] ,					_a     :							Optional[int] ,					_a     :							Any ,					_a     :							Optional[int] ,					_a     :							Dict ,					_a     :							Dict			):






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

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






      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],
                        ):
                              snake_case_						       =							strong
                        else:
                              snake_case_						       =							0

def   snake_case_       (							_a     :							List[Any] ,					_a     :							int=15 ,					_a     :							Union[str, Any]=30 ,					_a     :							Union[str, Any]=128 ,					_a     :							Optional[Any]=255			):
      snake_case_						       =							img_convolve(UpperCamelCase__ ,					gen_gaussian_kernel(9 ,					sigma=1.4			)			)
      # get the gradient and degree by sobel_filter
      snake_case_       ,	snake_case_						       =							sobel_filter(UpperCamelCase__			)
      snake_case_						       =							PI + np.radadeg(UpperCamelCase__			)

      snake_case_						       =							suppress_non_maximum(image.shape ,					UpperCamelCase__ ,					UpperCamelCase__			)

      detect_high_low_threshold(
          image.shape ,					UpperCamelCase__ ,					UpperCamelCase__ ,					UpperCamelCase__ ,					UpperCamelCase__ ,					UpperCamelCase__			)

      track_edge(image.shape ,					UpperCamelCase__ ,					UpperCamelCase__ ,					UpperCamelCase__			)

      return destination


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



'''simple docstring'''





def   snake_case_       (							_a     :							List[str] ,					_a     :							List[str]			):
      snake_case_						       =							1
      while b > 0:
            if b & 1:
                  res *= a

            a *= a
            b >>= 1

      return res
def   snake_case_       (							_a     :							Union[str, Any] ,					_a     :							Tuple ,					_a     :							Optional[Any]			):
      snake_case_						       =							1
      while b > 0:
            if b & 1:
                  snake_case_						       =							((res % c) * (a % c)) % c

            a *= a
            b >>= 1

      return res

