http://snippets.dzone.com/posts Wed, 27 Aug 2008 19:54:05 GMT DZone Snippets: imaging code http://snippets.dzone.com/posts/show/2620 <code> <br />/** <br /> * Calculates S-curve for point x in the interval 0 .. normV <br /> * <br /> * @param x input coordinate <br /> * @param normV scale value which corresponds to 1.0 if x is normalized <br /> * @param sharpness adjusts steepness of curve (value of 1 equals undistorted sigmoid) <br /> * <br /> * @return sigmoid for point X <br /> */ <br />public float sigmoid(float x, float normV, float sharpness) { <br /> x=(x/normV*2-1)*5*sharpness; <br /> return 1.0f / (1.0f + (float)Math.exp(-x)); <br />} <br /> <br />public double sigmoid(double x, double normV, double sharpness) { <br /> x=(x/normV*2-1)*5*sharpness; <br /> return 1.0 / (1.0 + Math.exp(-x)); <br />} <br /></code> Mon, 18 Sep 2006 17:23:30 GMT http://snippets.dzone.com/posts/show/2620 toxi (karsten schmidt)