/*
* Created on September 9, 2006, 3:17 PM
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*
* Copyright 2007 by Jon A. Webb
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the Lesser GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package jjil.algorithm;
import jjil.core.Error;
import jjil.core.Gray8Image;
import jjil.core.Image;
import jjil.core.PipelineStage;
import jjil.core.RgbImage;
import jjil.core.Sequence;
/**
* This PipelineStage warps a trapezoid in the input gray image into a
* rectangular output image. The trapezoid is alined vertically, i.e., the
* vertical edges are parallel
* @author webb
*/
public class RgbHorizGaussSmooth extends PipelineStage {
private Sequence seqR, seqG, seqB;
int nSigma;
/** Creates a new instance of RgbHorizGaussSmooth. RgbVertTrapWarp smooths
* an RgbImage using a horizontal Gaussian blur. The red, green, and blue
* values are smoothed independently.
* @param nSigma the sigma value of window to blur over
* @throws jjil.core.Error if sigma out of range
*/
public RgbHorizGaussSmooth(int nSigma) throws jjil.core.Error {
setSigma(nSigma);
}
/**
* Smooth an RgbImage horizontally using a Gaussian blur.
* @param image the input RgbImage.
* @throws jjil.core.Error if the input image is not an RgbImage
*/
public void push(Image image) throws jjil.core.Error {
if (!(image instanceof RgbImage)) {
throw new Error(
Error.PACKAGE.ALGORITHM,
ErrorCodes.IMAGE_NOT_RGBIMAGE,
image.toString(),
null,
null);
}
this.seqR.push(image);
this.seqG.push(image);
this.seqB.push(image);
super.setOutput(Gray3Bands2Rgb.push(
(Gray8Image)this.seqR.getFront(),
(Gray8Image)this.seqG.getFront(),
(Gray8Image)this.seqB.getFront()));
}
/** Sets the Gaussian blur width. Constructs 3 pipelines to use for smoothing
* each band of the RgbImage independently.
* @param nSigma the sigma of the window to blur over
* @throws jjil.core.Error if sigma out of range
*/
public void setSigma(int nSigma) throws jjil.core.Error {
this.nSigma = nSigma;
this.seqR = new Sequence(new RgbSelectGray(RgbSelectGray.RED));
this.seqR.add(new Gray8GaussHoriz(nSigma));
this.seqG = new Sequence(new RgbSelectGray(RgbSelectGray.GREEN));
this.seqG.add(new Gray8GaussHoriz(nSigma));
this.seqB = new Sequence(new RgbSelectGray(RgbSelectGray.BLUE));
this.seqB.add(new Gray8GaussHoriz(nSigma));
}
/**
* Returns a string describing the current instance. All the constructor
* parameters are returned in the order specified in the constructor.
* @return The string describing the current instance
*/
public String toString() {
return super.toString() + " (" + this.nSigma + ")"; //$NON-NLS-1$
}
}