add_noise_distributionT_add_noise_distributionAddNoiseDistributionAddNoiseDistributionadd_noise_distribution (Operator)

名称

add_noise_distributionT_add_noise_distributionAddNoiseDistributionAddNoiseDistributionadd_noise_distribution — Add noise to an image.

签名

描述

add_noise_distributionadd_noise_distributionAddNoiseDistributionAddNoiseDistributionAddNoiseDistributionadd_noise_distribution adds noise distributed according to DistributionDistributionDistributionDistributiondistributiondistribution to the ImageImageImageImageimageimage. The resulting gray values are clipped to the range of the corresponding pixel type.

The DistributionDistributionDistributionDistributiondistributiondistribution is stored in a tuple of length 513. The individual values of this tuple define the frequency of noise with a specific amplitude defined by the position within the tuple. The central value, i.e., the value at the position 256 in the tuple defines the frequency of pixels that are not changed. The value at the position 255 defines the frequency of pixels for which the grayvalue is decreased by 1. The value at the position 254 defines the respective frequency for a grayvalue decrease of 2, and so on. Analogously, the value at position 257 defines the frequency of pixels for which the grayvalue is increased by 1.

The DistributionDistributionDistributionDistributiondistributiondistribution represents salt and pepper noise if at most one value at a position smaller than 256 is not equal to zero and at most one value at a position larger than 256 is not equal to zero. In case of salt and pepper noise, the added noisy pixels are set to the minimum (pepper) and maximum (salt) values that can be represented by ImageNoiseImageNoiseImageNoiseImageNoiseimageNoiseimage_noise if the amount of pepper is indicated by the value at position 0 and the amount of salt is indicated by the value at position 512 in the tuple.

执行信息

• Multithreading type: reentrant (runs in parallel with non-exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Automatically parallelized on tuple level.
• Automatically parallelized on channel level.

参数

read_image(Image,'mreut')
dev_display (Image)
sp_distribution(30,30,Dist)
add_noise_distribution(Image,ImageNoise,Dist)
dev_display (ImageNoise)

read_image(&Image,"fabrik");
disp_image(Image,WindowHandle);
set_d(PerSalt,30.0,0);
set_d(PerPepper,30.0,0);
T_sp_distribution(PerSalt,PerPepper,&Dist);
T_add_noise_distribution(Image,&ImageNoise,Dist);
disp_image(ImageNoise,WindowHandle);

read_image(Image,'mreut')
dev_display (Image)
sp_distribution(30,30,Dist)
add_noise_distribution(Image,ImageNoise,Dist)
dev_display (ImageNoise)

read_image(Image,'mreut')
dev_display (Image)
sp_distribution(30,30,Dist)
add_noise_distribution(Image,ImageNoise,Dist)
dev_display (ImageNoise)

read_image(Image,'mreut')
dev_display (Image)
sp_distribution(30,30,Dist)
add_noise_distribution(Image,ImageNoise,Dist)
dev_display (ImageNoise)

结果

add_noise_distributionadd_noise_distributionAddNoiseDistributionAddNoiseDistributionAddNoiseDistributionadd_noise_distribution returns 2 ( H_MSG_TRUE) if all parameters are correct. If the input is empty the behavior can be set via set_system('no_object_result',<Result>)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)set_system("no_object_result",<Result>). If necessary, an exception is raised.

可能的前置算子

gauss_distributiongauss_distributionGaussDistributionGaussDistributionGaussDistributiongauss_distribution, sp_distributionsp_distributionSpDistributionSpDistributionSpDistributionsp_distribution, noise_distribution_meannoise_distribution_meanNoiseDistributionMeanNoiseDistributionMeanNoiseDistributionMeannoise_distribution_mean

替代算子

add_noise_whiteadd_noise_whiteAddNoiseWhiteAddNoiseWhiteAddNoiseWhiteadd_noise_white

另见

sp_distributionsp_distributionSpDistributionSpDistributionSpDistributionsp_distribution, gauss_distributiongauss_distributionGaussDistributionGaussDistributionGaussDistributiongauss_distribution, noise_distribution_meannoise_distribution_meanNoiseDistributionMeanNoiseDistributionMeanNoiseDistributionMeannoise_distribution_mean, add_noise_whiteadd_noise_whiteAddNoiseWhiteAddNoiseWhiteAddNoiseWhiteadd_noise_white

模块

Foundation