photo by the camera software, leading to an irreversible loss of detail. See also Difference of Gaussians Image noise Gaussian filter Gaussian pyramid Infinite impulse response (IIR) Scale space implementation Median filter Weierstrass transform Notes and references External links GLSL implementation of a separable gaussian blur filter. Example for Gaussian blur (low-pass filtering) applied to a wood-block print and an etching in order to remove details for picture comparison. Mathematica GaussianFilter function OpenCV (C++) GaussianBlur function Image processing Gaussian function Image noise reduction techniques