Stacking Signal-to-Noise Rechner — Formel

Signal-to-Noise Improvement from Stacking

Stacking multiple exposures averages out random noise while the signal adds coherently.

Formula

SNR_total = SNR_single * sqrt(N)

  • *N* = number of stacked frames

    • Doubling the SNR requires four times as many frames. This is the square-root law of signal averaging.

    Lösungsbeispiel

    Stack 100 frames each with SNR = 5.

    1. SNR_total = SNR_single * sqrt(N)
    2. SNR_total = 5 * sqrt(100)
    3. SNR_total = 5 * 10 = 50