/**
* Perform segmentation
*
* @return segmentation interpretation
*/
private Segmentation doSegmentation() {
Segmentation seg = new Segmentation();
ArrayList<Stroke> substrokes = new ArrayList<Stroke>();
Stroke s1 = new Stroke();
Stroke s2 = new Stroke();
for (int i = 0; i < m_features.getNumOrigPoints(); i++) {
if ((double) i / m_features.getNumOrigPoints() >= 0.5)
s2.addPoint(m_features.getOrigPoints().get(i));
else s1.addPoint(m_features.getOrigPoints().get(i));
}
substrokes.add(s1);
substrokes.add(s2);
// Set the parent
for (Stroke substroke : substrokes) {
substroke.setParent(m_features.getOrigStroke());
}
seg.setSegmentedStrokes(substrokes);
seg.setSegmenterName(S_SEGMENTER_NAME);
return seg;
}
/**
* Construct a rectangle fit for a stroke
*
* @param features features of the stroke
* @param ellipseFit ellipse fit of the stroke
* @param segmentation corner finding interpretation
*/
public RectangleFit(StrokeFeatures features, EllipseFit ellipseFit, Segmentation segmentation) {
super(features);
m_ellipseFit = ellipseFit;
// test 1: feature area error must be low
try {
m_err =
FeatureArea.toRectangle(m_features.getOrigPoints(), m_features.getBounds())
/ m_features.getBounds().getArea();
} catch (Exception e) {
m_passed = false;
m_fail = 0;
return;
}
if (m_err > Thresholds.active.M_RECTANGLE_ERROR) {
m_passed = false;
m_fail = 1;
}
// test 2: diagonal of bounding box should be similar to major axis
m_ratio =
Math.abs(
1.0 - m_ellipseFit.getMajorAxisLength() / m_features.getBounds().getDiagonalLength());
if (m_ratio > Thresholds.active.M_BB_MAJOR_AXIS_RATIO) {
m_passed = false;
m_fail = 2;
}
// test 3: endpoints of stroke must be close
if (m_features.getEndptStrokeLengthRatio() > 0.09) { // 0.075)
m_passed = false;
m_fail = 3;
}
// test 4: check number of corners to make sure its not too high
// if (segmentation.getSegmentedStrokes().size() > 6)
// m_passed = false;
// this is a check that checks for triangles
m_numCorners = segmentation.getSegmentedStrokes().size();
double perimeter = m_features.getBounds().getPerimeter();
m_perimeterStrokeLengthRatio = m_features.getStrokeLength() / perimeter;
if (m_perimeterStrokeLengthRatio < 0.85 && m_numCorners < 4) {
m_passed = false;
m_fail = 4;
}
// new test: corner distance
if (m_features.getAvgCornerStrokeDistance() > 0.16) m_passed = false;
// create shape/beautified object
generateRectangle();
try {
computeBeautified();
m_beautified.setAttribute(IsAConstants.CLOSED, "true");
} catch (Exception e) {
log.error("Could not create shape object: " + e.getMessage(), e);
e.printStackTrace();
}
// log.debug("Rectangle Fit: passed = " + m_passed + "(" + m_fail
// + ") err = " + m_err + " lsqe = " + m_lsqe + " ellipse err = "
// + m_ellipseFit.getError() + " major:bbdiag ratio = " + m_ratio
// + " dcr = " + m_features.getDCR() + " ndde = "
// + m_features.getNDDE() + " endpt:sl ratio = "
// + m_features.getEndptStrokeLengthRatio() + " num ss = "
// + m_numCorners + " avg corner/stroke dist = "
// + m_features.getAvgCornerStrokeDistance() + " num revs = "
// + m_features.numRevolutions() + " perimeter:sl ratio = "
// + m_perimeterStrokeLengthRatio);
}