MatLab built-in function rand() gives uniform dist random numbers. x = rand(10); xgauss = exp( -0.5*( ( x-mu )./std ).^2 )/sqrt(2*pi*std); The above gives 1D Gaussian noise. But now I'd like to add Gaussian noise to a 2D picture. How do I generate 2D Gaussian noise then? Thanks, by Cheng Cosine Aug/09/2k6 NC -- ┌─────◆ＫＫＣＩＴＹ◆─────┐ ◢╱ 只要你通过身份认证 ~ ◥█ │ bbs.kkcity.com.tw │ █▉─ 免经验、五人连署即开班系板 ◥ └──《From:152.16.233.74 》──┘ ◥╲ 赶快为班上设个秘密基地吧! ◢ --