Code Viewing

import board

import busio

import numpy as np

import adafruit_mlx90640

import cv2

from picamera2 import Picamera2

import time

# ---- Set up MLX90640 (Thermal Camera) ----

i2c = busio.I2C(board.SCL, board.SDA, frequency=400000)

mlx = adafruit_mlx90640.MLX90640(i2c)

mlx.refresh_rate = adafruit_mlx90640.RefreshRate.REFRESH_4_HZ  # Keep low to match Pi display

mlx_shape = (24, 32)

# ---- Set up Pi Camera ----

picam2 = Picamera2()

picam2.preview_configuration.main.size = (640, 480)

picam2.preview_configuration.main.format = "RGB888"

picam2.configure("preview")

picam2.start()

time.sleep(1)  # Let camera warm up

# ---- Main Loop ----

while True:

    try:

        # --- Capture RGB Frame ---

        rgb_frame = picam2.capture_array()

        rgb_small = cv2.resize(rgb_frame, (320, 240))

        # --- Capture Thermal Frame ---

        frame = [0] * 768

        mlx.getFrame(frame)

        thermal = np.reshape(frame, mlx_shape)

        # Normalize and apply colormap

        thermal = np.clip(thermal, 20, 100)  # Optional: clip range

        norm = cv2.normalize(np.array(thermal), None, 0, 255, cv2.NORM_MINMAX)

        thermal_colored = cv2.applyColorMap(np.uint8(norm), cv2.COLORMAP_INFERNO)

        thermal_resized = cv2.resize(thermal_colored, (320, 240), interpolation=cv2.INTER_NEAREST)

        # --- Combine Views Side by Side ---

        combined = np.hstack((rgb_small, thermal_resized))

        cv2.imshow("RGB (left) + Thermal (right)", combined)

        # --- Break on 'q' ---

        if cv2.waitKey(1) & 0xFF == ord('q'):

            break

    except Exception as e:

        print("Error:", e)

cv2.destroyAllWindows()