``add Gaussian noise'' - add Gaussian noise to a volume

VFX name:

iGaussNoise.

IMPROPTU name:

Gaussian_Noise_Generator.

purpose:

Add Gaussian noise having a specified standard deviation to an 8-bit volume.

input:

An 8-bit volume.

output:

An 8-bit volume having Gaussian noise added to it.

parameters:

Default parameters menu is

standard_deviation = 20

The noise standard deviation is in graylevels on an 8-bit grayscale.

comments:

1.

This is a slow function. If you wish to add noise to an entire volume, run the function in the background.

2.

All results are confined to 8-bits. Thus, values above 255 or below 0 (after noise is added) are clipped to their respective limits.