Howtosignalprocessing
- How do you add Gaussian noise to an image in Matlab?
- How do you make white Gaussian noise in Matlab?
- What is the PSD of white Gaussian noise?
How do you add Gaussian noise to an image in Matlab?
J = imnoise( I ,'gaussian', m ) adds Gaussian white noise with mean m and variance of 0.01. J = imnoise( I ,'gaussian', m , var_gauss ) adds Gaussian white noise with mean m and variance var_gauss .
How do you make white Gaussian noise in Matlab?
y = awgn( x , snr ) adds white Gaussian noise to the vector signal x . This syntax assumes that the power of x is 0 dBW. For more information about additive white Gaussian noise, see What is AWGN? y = awgn( x , snr , signalpower ) accepts an input signal power value in dBW.
What is the PSD of white Gaussian noise?
The random process X(t) is called a white Gaussian noise process if X(t) is a stationary Gaussian random process with zero mean, μX=0, and flat power spectral density, SX(f)=N02, for all f. This again confirms that white noise has infinite power, E[X(t)2]=RX(0).
