python - Trying to read Thermal Data from Hikvision Camera in Python

Question

I'm looking for solution to access thermal data of camera. well i used OpenCV and only could got original image. but there is no more data for process like temperature. I tried available library about HikVision cameras and surfed the net for this. but i could not be succeed. also I tried FLIR library but no success.

second solution that I have is converting RGB to temperature but i don't know what to do for this kind of process. Also I know the range of device temperature which is between-20 to 150 degree

looking for something like this:

# cam model: hikvision DS-2TD2615-10

import cv2
import hikvision api library for example

thermal = cv2.VideoCapture()
thermal.open("rtsp://""user:pass@ip:port/Streaming/channels/202/")
ret, frame = thermal.read()

while True:
   ret, frame = thermal.read()

   temp_data = api.read_temperature(frame) # -> array or excel file

   cv2.imshow('frame', frame)  
   if cv2.waitKey(1) & 0xFF == ord('q'):
       break
thermal.release()
cv2.destroyAllWindows()

and my video input is something similar to this pic and for example i want to find out the nose is how much hot just by click on it: