/*
* Gray8Abs.java
*
* Created on August 27, 2006, 4:32, PM
*
* To change this templatef, 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;
/**
* Computes absolute value of a Gray8Image, replacing the original.
* @author webb
*/
public class Gray8Abs extends PipelineStage {
/** Creates a new instance of Gray8Abs
*
*/
public Gray8Abs() {
}
/**
* Compute absolute value of the image. Input is range
* Byte.MIN_VALUE to Byte.MAX_VALUE; output is 0..Byte.MAX_VALUE
* @param image the input Gray8Image
* @throws jjil.core.Error if image is not a Gray8Image
*/
public void push(Image image) throws jjil.core.Error {
if (!(image instanceof Gray8Image)) {
throw new Error(
Error.PACKAGE.ALGORITHM,
ErrorCodes.IMAGE_NOT_GRAY8IMAGE,
image.toString(),
null,
null);
}
Gray8Image input = (Gray8Image) image;
byte[] bIn = input.getData();
for (int i=0; i<bIn.length; i++) {
bIn[i] = (byte) Math.min(Byte.MAX_VALUE, Math.abs(bIn[i]));
}
super.setOutput(input);
}
}