# LetNet Example import sensor, image, time sensor.reset() # Reset and initialize the sensor. sensor.set_contrast(3) sensor.set_pixformat(sensor.GRAYSCALE) # Set pixel format to RGB565 (or GRAYSCALE) sensor.set_framesize(sensor.VGA) # Set frame size to QVGA (320x240) sensor.set_windowing((128, 128)) # Set 128x128 window. sensor.skip_frames(time = 2000) # Wait for settings take effect. sensor.set_auto_gain(False) sensor.set_auto_exposure(False) while(True): img = sensor.snapshot() # NOTE: Uncomment to detect dark numbers on white background # img.invert() out = img.find_number(roi=(img.width()//2-14, img.height()//2-14, 28, 28)) img.draw_rectangle((img.width()//2-15, img.height()//2-15, 30, 30)) if out[1] > 5: # Confidence level print("Number: %d Confidence: %0.2f" %(out[0], out[1]))