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/*
* To change this template, choose Tools | Templates
* getAnd open the template in the editor.
*/
package edu.wpi.first.wpijavacv;
import static com.googlecode.javacv.cpp.opencv_core.*;
import static com.googlecode.javacv.cpp.opencv_imgproc.*;
/**
* A grayscale image
*
* @author Greg Granito
*/
public class WPIGrayscaleImage extends WPIImage {
WPIGrayscaleImage(IplImage imageSrc) {
super(imageSrc);
}
/**
* Returns a black and white image where every pixel that is higher (in the 0-255 scale) than the given threshold is <bold>white</bold>,
* and everything below is <bold>black</bold>.
* @param threshold a value 0-255. if a pixel has a value below the theshold, it becomes black
* if the pixel value is above or equal to the threshold, the pixel becomes white
* @return a new {@link WPIBinaryImage} that represents the threshold
*/
public WPIBinaryImage getThreshold(int threshold) {
validateDisposed();
IplImage bin = IplImage.create(image.cvSize(), 8, 1);
cvThreshold(image, bin, threshold, 255, CV_THRESH_BINARY);
return new WPIBinaryImage(bin);
}
/**
* Returns a black and white image where every pixel that is higher (in the 0-255 scale) than the given threshold is <bold>black</bold>,
* and everything below is <bold>white</bold>.
*
* In other words, this will return the inverted image of {@link WpiGrayscaleImage#getThreshold(int) getThreshold(...)} but is
* more efficient than calling {@link WpiGrayscaleImage#getThreshold(int) getThreshold(...)}.{@link WPIBinaryImage#getInverse() getInverse()}
* @param threshold a value 0-255. if a pixel has a value below the theshold, it becomes black
* if the pixel value is above or equal to the threshold, the pixel becomes white
* @return a new {@link WPIBinaryImage} that represents the threshold
*/
public WPIBinaryImage getThresholdInverted(int threshold) {
validateDisposed();
IplImage bin = IplImage.create(image.cvSize(), 8, 1);
cvThreshold(image, bin, threshold, 255, CV_THRESH_BINARY_INV);
return new WPIBinaryImage(bin);
}
}
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