jigl.signal.ops
Class Convolve

java.lang.Object
  |
  +--jigl.signal.SimpleOperator
        |
        +--jigl.signal.ops.Convolve

All Implemented Interfaces:

Operator

public class Convolve

extends SimpleOperator

Performs convolution on a signal with a supplied SignalKernel. It is always a good idea to normalize the kernel before convolution.

Supports DiscreteSignal, RealSignal.

Field Summary

private SignalKernel

kernel Comvolution kernel.

Constructor Summary

Convolve(SignalKernel k)
Constructs a Convolve object from a Signalkerne object k (You'd better normalize k).

Method Summary

RealSignal	apply_long(RealSignal signal) Performs a convolution on a RealSignal and returns a longer signal.
protected Signal	apply(DiscreteSignal signal) Performs a convolution on a DiscreteSignal.
protected Signal	apply(DiscreteSignal signal, ROI roi) Performs a convolve on a DiscreteSignal in a region of interest.
protected Signal	apply(RealSignal signal) Performs a convolution on a RealSignal.
protected Signal	apply(RealSignal signal, ROI roi) Performs a convolve on a RealSignal in a region of interest.

Methods inherited from class jigl.signal.SimpleOperator

apply, apply, apply, apply, apply, apply

Methods inherited from class java.lang.Object

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

Field Detail

kernel

private SignalKernel kernel

Comvolution kernel.

Constructor Detail

Convolve

public Convolve(SignalKernel k)

Constructs a Convolve object from a Signalkerne object k (You'd better normalize k).

Parameters:

k - kernel to be used with the convolve operation.

Method Detail

apply

protected Signal apply(DiscreteSignal signal)

Performs a convolution on a DiscreteSignal. The center of the kernel is specified at position kernel.length()/2. Returned signal is a DiscreteSignal with the same length as signal. (signal is not modified).

Overrides:

apply in class SimpleOperator

Parameters:

signal - DiscreteSignal to convolve

Returns:

DiscreteSignal

apply

protected Signal apply(DiscreteSignal signal,
                       ROI roi)

Performs a convolve on a DiscreteSignal in a region of interest. The center of the kernel is specified at position kernel.length()/2. Returned signal is a DiscreteSignal with the same length as signal. (signal is not modified).

Overrides:

apply in class SimpleOperator

Parameters:

signal - DiscreteSignal to convolve

roi - Region of Interest of signal

Returns:

DiscreteSignal

apply

protected Signal apply(RealSignal signal)

Performs a convolution on a RealSignal. The center of the kernel is specified at position kernel.length()/2. Returned signal is a RealSignal with the same length as signal. (signal is not modified).

Overrides:

apply in class SimpleOperator

Parameters:

signal - RealSignal to convolve

Returns:

RealSignal

apply

protected Signal apply(RealSignal signal,
                       ROI roi)

Performs a convolve on a RealSignal in a region of interest. The center of the kernel is specified at position kernel.length()/2. Returned signal is a RealSignal with the same length as signal. (signal is not modified).

Overrides:

apply in class SimpleOperator

Parameters:

signal - RealSignal to convolve

roi - Region of Interest of signal

Returns:

RealSignal

apply_long

public RealSignal apply_long(RealSignal signal)

Performs a convolution on a RealSignal and returns a longer signal. Returned signal is a RealSignal with the length specified by signal.length() + kernel.length() - 1. (signal is not modified).

Parameters:

signal - RealSignal to convolve

Returns:

RealSignal