Salt and Pepper的公式如下
I(nim , i , j) = 0 if uniform( 0 , 1 ) < saltI(nim , i , j) = 255 if uniform( 0 , 1 ) > 1 - pepperI(nim , i , j) = I(im , i , j) otherwiseuniform( 0 , 1 ) : ramdom variable uniformly distributed over [ 0, 1 ] 1 
/**/ /* 2
(C) OOMusou 2006 http://oomusou.cnblogs.com 3 4Filename : SaltAndPepperNoise.cpp 5Compiler : Visual C++ 8.0 / C++/CLI 6Description : Demo how to process Salt and Pepper Noise 7Release : 12/20/2006 1.0 8
*/ 9 10 #include " stdafx.h " 11 #include " stdlib.h " 12 13 using namespace System::Drawing; 14 using namespace System::Drawing::Imaging; 15 16 void saltpepperNoise(Bitmap ^ , Bitmap ^ , double& , double& ); 17 18 int main() 
{ 19 // Read lena.jpg20 Bitmap^ oriImg = gcnew Bitmap("lena.jpg");21 // Declare Gaussian image for lena.jpg22 Bitmap^ spImg = gcnew Bitmap(oriImg->Width, oriImg->Height);2324 // Salt-and-Pepper noise with salt rate=5% and pepper rate=5%25 double salt = 0.05, pepper = 0.05;26 saltpepperNoise(oriImg, spImg, salt, pepper);27 spImg->Save("lena_saltpepper.jpg");2829 return 0;3031} 32 33 void saltpepperNoise(Bitmap ^ oriImg, Bitmap ^ spImg, double& salt, double& pepper) { 34
for(int y = 0; y != oriImg->Height; ++y) { 35 for(int x = 0; x != oriImg->Width; ++x) { 36 double val = (double)rand() / RAND_MAX;3738 if (val < salt) { 39 spImg->SetPixel(x, y, Color::Black);40
}41 else if (val > 1-pepper) { 42 spImg->SetPixel(x, y, Color::White);43 }44 else { 45 spImg->SetPixel(x, y, oriImg->GetPixel(x, y));46 }47 }48 }49}
原圖 /**/ /* 2(C) OOMusou 2006 http://oomusou.cnblogs.com 3 4Filename : SaltAndPepperNoise.cpp 5Compiler : Visual C++ 8.0 / C++/CLI 6Description : Demo how to process Salt and Pepper Noise 7Release : 12/20/2006 1.0 8*/ 9 10 #include " stdafx.h " 11 #include " stdlib.h " 12 13 using namespace System::Drawing; 14 using namespace System::Drawing::Imaging; 15 16 void saltpepperNoise(Bitmap ^ , Bitmap ^ , double& , double& ); 17 18 int main() { 19 // Read lena.jpg20 Bitmap^ oriImg = gcnew Bitmap("lena.jpg");21 // Declare Gaussian image for lena.jpg22 Bitmap^ spImg = gcnew Bitmap(oriImg->Width, oriImg->Height);2324 // Salt-and-Pepper noise with salt rate=5% and pepper rate=5%25 double salt = 0.05, pepper = 0.05;26 saltpepperNoise(oriImg, spImg, salt, pepper);27 spImg->Save("lena_saltpepper.jpg");2829 return 0;3031} 32 33 void saltpepperNoise(Bitmap ^ oriImg, Bitmap ^ spImg, double& salt, double& pepper) { 34 for(int y = 0; y != oriImg->Height; ++y) { 35 for(int x = 0; x != oriImg->Width; ++x) { 36 double val = (double)rand() / RAND_MAX;3738 if (val < salt) { 39 spImg->SetPixel(x, y, Color::Black);40 }41 else if (val > 1-pepper) { 42 spImg->SetPixel(x, y, Color::White);43 }44 else { 45 spImg->SetPixel(x, y, oriImg->GetPixel(x, y));46 }47 }48 }49} 
執行結果 