sp_distribution ( : : PercentSalt, PercentPepper : Distribution )

Generate a salt-and-pepper noise distribution.

sp_distribution generates a noise distribution with the values 0 and 255. The parameters PercentSalt and PercentPepper determine the percentage of white and black noise pixels, respectively. The sum of these parameters must be smaller than 100. Usually, the result Distribution is used as input for the operator add_noise1.


Parameters

PercentSalt (input_control)
number -> real / integer
Percentage of salt (white noise pixels).
Default value: 5.0
Suggested values: 1.0, 2.0, 5.0, 7.0, 10.0, 15.0, 20.0, 30.0
Range of values: 0.0 <= PercentSalt <= 100.0
Minimum increment: 0.1
Recommended increment: 1.0
Restriction: (0.0 <= PercentSalt) && (PercentSalt <= 100.0)

PercentPepper (input_control)
number -> real / integer
Percentage of pepper (black noise pixels).
Default value: 5.0
Suggested values: 1.0, 2.0, 5.0, 7.0, 10.0, 15.0, 20.0, 30.0
Range of values: 0.0 <= PercentPepper <= 100.0
Minimum increment: 0.1
Recommended increment: 1.0
Restriction: (0.0 <= PercentPepper) && (PercentPepper <= 100.0)

Distribution (output_control)
distribution.values-array -> real
Resulting noise distribution.
Number of elements: 513


Example
read_image(:Image:'fabrik':) >
disp_image(Image:::) >
sp_distribution(::30,30:Dist)
add_noise1(Image,ImageNoise:Dist::) >
disp_image(ImageNoise:::).

Possible Successors

add_noise1


Alternatives

gauss_distribution, noise_distribution_mean


See also

gauss_distribution, noise_distribution_mean, add_noise2



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