net.imglib2.algorithm.convolution.fast_gauss

Class FastGauss

java.lang.Object

net.imglib2.algorithm.convolution.fast_gauss.FastGauss

public class FastGauss
extends Object

Faster alternative to Gauss3. It's especially faster if sigma is larger than 3.

It's expensive to calculate the exact result of the gaussian blur. That's why approximations are almost always used. Gauss3 does an approximation by cutting off the gauss kernel at 3*sigma + 1. FastGauss uses a different approach known as fast Gauss transformation. It's runtime is independent of sigma.

See FastGaussCalculator for more details.

Author:

Vladimir Ulman, Matthias Arzt

Constructor Summary

Constructors

Constructor and Description
FastGauss()

Method Summary

Modifier and Type	Method and Description
static Convolution<net.imglib2.type.numeric.RealType<?>>	convolution(double sigma)
static Convolution<net.imglib2.type.numeric.RealType<?>>	convolution(double[] sigma)
static Convolution<net.imglib2.type.numeric.RealType<?>>	convolution1d(double sigma, int direction)
static void	convolve(double[] sigmas, net.imglib2.RandomAccessible<? extends net.imglib2.type.numeric.RealType<?>> input, net.imglib2.RandomAccessibleInterval<? extends net.imglib2.type.numeric.RealType<?>> output)
static void	convolve(double sigma, net.imglib2.RandomAccessible<? extends net.imglib2.type.numeric.RealType<?>> input, net.imglib2.RandomAccessibleInterval<? extends net.imglib2.type.numeric.RealType<?>> output)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FastGauss

public FastGauss()

Method Detail

convolution

public static Convolution<net.imglib2.type.numeric.RealType<?>> convolution(double[] sigma)

convolution

public static Convolution<net.imglib2.type.numeric.RealType<?>> convolution(double sigma)

convolution1d

public static Convolution<net.imglib2.type.numeric.RealType<?>> convolution1d(double sigma,
                                                                              int direction)

convolve

public static void convolve(double[] sigmas,
                            net.imglib2.RandomAccessible<? extends net.imglib2.type.numeric.RealType<?>> input,
                            net.imglib2.RandomAccessibleInterval<? extends net.imglib2.type.numeric.RealType<?>> output)

convolve

public static void convolve(double sigma,
                            net.imglib2.RandomAccessible<? extends net.imglib2.type.numeric.RealType<?>> input,
                            net.imglib2.RandomAccessibleInterval<? extends net.imglib2.type.numeric.RealType<?>> output)