Tuning Computer Vision Models for Low-Light Fields

A practical walkthrough of the augmentation and calibration steps that fixed our night-time detection rate.

Symptoms

Daytime recall was fine; after dusk it collapsed. Sensor noise and low contrast pushed detections below threshold.

The fix

Scale down confidence when the scene is dark, then re-calibrate the threshold:

# adjust detection confidence at night
def adjust_confidence(pred, lux):
    if lux < LOW_LIGHT_THRESHOLD:
        pred.conf *= NIGHT_SCALE_FACTOR
    return predCode language: Python (python)