code: def sqrt(inputArray, scale_min=None, scale_max=None):
      
  
      imageData = np.array(inputArray, copy=True)
  
      if scale_min is None:
          scale_min = imageData.min()
      if scale_max is None:
          scale_max = imageData.max()
  
      imageData = imageData.clip(min=scale_min, max=scale_max)
      imageData = imageData - scale_min
      indices = np.where(imageData < 0)
      imageData[indices] = 0.0
      imageData = np.sqrt(imageData)
      imageData = imageData / math.sqrt(scale_max - scale_min)
  
      return imageData
docs: Performs sqrt scaling of the input numpy array.
  
      @type inputArray: numpy array
      @param inputArray: image data array
      @type scale_min: float
      @param scale_min: minimum data value
      @type scale_max: float
      @param scale_max: maximum data value
      @rtype: numpy array
      @return: image data array