code: def generate_circle_mask(self):
      zero_arr = np.zeros((self.init_size, self.init_size), np.float32)
      circle_mask = cv2.circle(
          img=zero_arr,
          center=(self.init_size // 2, self.init_size // 2),
          radius=self.init_size // 2,
          color=1,
          thickness=-1,
      )
  
      return circle_mask
  
file_path: EasyOCR/trainer/craft/data/gaussian.py
imports: import numpy
  import cv2
  from data.boxEnlarge import enlargebox
label_desc: Use image node_id 3 for calling the GaussianBuilder obj's underlying member method code with example usage: obj.generate_circle_mask() and returns: circle_mask