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/*
* To change this template, choose Tools | Templates
* and 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.*;
/**
* This is a class that represents contours, it can only be obtained from
* the findContours() method of WpiBinaryImage
* @author Greg Granito
*/
public class WPIContour extends WPIDisposable {
CvSeq contours;
CvRect rect;
WPIContour(CvSeq contours) {
this.contours = contours;
// memStorage = contours.storage();
}
CvSeq getCVSeq(){
return contours;
}
/**
*
* @return the height of the bounding rectangle of the contour
*/
public int getHeight(){
if(rect == null || rect.isNull())
rect = cvBoundingRect(contours, 1);
return rect.height();
}
/**
*
* @return the width of the bounding rectangle of the contour
*/
public int getWidth(){
if(rect == null || rect.isNull())
rect = cvBoundingRect(contours, 1);
return rect.width();
}
/**
*
* @return the x coord of the top left corner of the bounding rectangle
*/
public int getX(){
if(rect == null || rect.isNull())
rect = cvBoundingRect(contours, 1);
return rect.x();
}
/**
*
* @return the y coord of the top left corner of the bounding rectangle
*/
public int getY(){
if(rect == null || rect.isNull())
rect = cvBoundingRect(contours, 1);
return rect.y();
}
/**
*
* @param percentAccuracy the percentage the perimeter of the polygon can be off
* the perimeter of the contour. The higher the value, the fewer points the polygon
* will have. A value of 4-5 is recommended.
* @return the approximated WpiPolygon
*/
public synchronized WPIPolygon approxPolygon(double percentAccuracy){
WPIPolygon polygon = new WPIPolygon(cvApproxPoly(contours, contours.header_size(), contours.storage(), CV_POLY_APPROX_DP, percentAccuracy, 0));
if (getPool() != null) {
getPool().addToPool(polygon);
}
return polygon;
}
/**
*
* @return the perimeter of the contour
*/
public int getlength(){
return (int) cvContourPerimeter(contours);
}
public void disposed() {
contours.deallocate();
}
}
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