class_docstr: Vector decomposition and normalization, refer Realtime Multi-Person 2D Pose Estimation using Part Affinity Fields
  for more details.
  
  Args:
      thresh(float): Threshold value for selecting candidate vector, default is 0.05.
code: def __init__(self, thresh: float = 0.05):
      self.thresh = thresh
  
imports: import base64
  import math
  from typing import Callable
  import cv2
  import numpy
  from scipy.ndimage import gaussian_filter
label_desc: Use image node_id 1 to create a new CalculateVector object  with example: obj = CalculateVector(thresh)