Pamaddnoise User Manual(0) Pamaddnoise User Manual(0)
pamaddnoise - add noise to a Netpbm image
[-seed int] pamaddnoise -type gaussian
[-sigma2 value] [-seed int]
[netpbmfile] pamaddnoise -type multiplicative_gaussian
[-mgsigma value] [-seed int]
[netpbmfile] pamaddnoise -type impulse
[-seed int] [netpbmfile] pamaddnoise -type laplacian
[-seed int] [netpbmfile] pamaddnoise -type poisson
[-seed int] [netpbmfile]
This program is part of Netpbm(1)
pamaddnoise adds the specified noise type to a Netpbm image. pamaddnoise treats a PPM
image as 3 independent planes, not as a plane of colors in a color space.
Used for poisson noise only. The default value is 0.05.
Used for laplacian noise only. The default value is 10.0.
Used for multiplicative gaussian noise only. The default value is 0.5.
Used for all noise types. Set the initial random number generator seed value.
Used for gaussian noise only. The default value is 4.0.
Used for gaussian noise only. The default value is 20.0.
Used for impulse noise only. The default value is 0.10. This means that 5% of all
pixel values will be set to 0 and 5% will be set to the maxval
Select type of noise by name. The following noise types are available: gaussian,
multiplicative_gaussian, impulse, laplacian, poisson. Only enough letters to be
unique are required for the noise type option. The default noise type is gaussian.
o 'Adaptive Image Restoration in Signal-Dependent Noise' by R. Kasturi Institute for
Electronic Science, Texas Tech University, 1982
o 'Digital Image Processing Algorithms' by Ioannis Pitas, Prentice Hall, 1993 ISBN
pgmnoise(1) , pgmmedian(1) , pnm(1) , pam(1) ,
pamaddnoise was added to Netpbm in Version 10.29 (August 2005). It had been distributed
by Mike Burns via his own web site before that (and continued to be so).
Burns' version, and the one in Netpbm 10.29, was called pnmaddnoise and worked only on PNM
images. In Netpbm 10.30, it was converted to handle PAM images and renamed to
Copyright (C) 1995 by Mike Burns <firstname.lastname@example.org>
netpbm documentation 14 November 1995 Pamaddnoise User Manual(0)