Excuse me, I now need to add the gaussian noise, but don't know how to choose the mean variance, is there a kind of gaussian noise variance under different conditions the selection of reference, or through some data to calculate the variance of the formula of the case, (the gaussian noise is added to the infrared image, the image is an altitude of 500 km from the earth, don't know which variance is more can reflect the situation of noise

CodePudding user response:

The amount of mean and variance are different each other it doesn't matter

CodePudding user response:

BBS people less and less now

CodePudding user response:

The mean is the average of the random variables, according to the need to set the
Variance is the average of the random variable from the dispersion degree, according to the need

CodePudding user response:

reference schlafenhamster reply: 3/f

average is the average of the random variables, according to the need to set the
Variance is the average of the random variable from the dispersion degree, according to the need to set the

That excuse me, according to need, this set is based on what to do,,, now know to add gaussian noise, but the mean and variance of specific for how much, judging by what

CodePudding user response:

Gaussian noise refers to the probability density function is it obey gaussian distribution (i.e., normal distribution) of a kind of noise,

The mean can represent the noise intensity,
Variance said dispersion


According to the law of large Numbers of multiple random variables and is gaussian distribution,

Add gaussian noise with software that tricky additive uniform distribution (multiple), can use the hardware

CodePudding user response:

reference 5 floor schlafenhamster reply:

gaussian noise refers to the probability density function is it obey gaussian distribution (i.e., normal distribution) of a kind of noise,

The mean can represent the noise intensity,
Variance said dispersion


According to the law of large Numbers of multiple random variables and is gaussian distribution,

Add gaussian noise with software that tricky additive uniform distribution (multiple), can use hardware

Just want to ask how the strength,,, for example, I now want to simulate the infrared images, a need to add gaussian noise, the strength and dispersion: how do I choose?

CodePudding user response:

Mean can represent the noise intensity, (such as the random 0, 1; 1, 10,,,)

Dispersion variance said, is not easy to control, you won't know until you test distribution function!