class_docstr: Get peak values and coordinate from input.
  
  Args:
      thresh(float): Threshold value for selecting peak value, default is 0.1.
code: def __init__(self, thresh=0.1):
      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 GetPeak object  with example: obj = GetPeak(thresh)