Exemplo n.º 1
0
  // Assumes that the points are ordered going around the quadrilateral
  private static double areaOfQuad(List<Point2D_F64> quad) {
    double area1 =
        boofcv.alg.feature.detect.quadblob.FindBoundingQuadrilateral.area(
            quad.get(0), quad.get(2), quad.get(1));
    double area2 =
        boofcv.alg.feature.detect.quadblob.FindBoundingQuadrilateral.area(
            quad.get(0), quad.get(2), quad.get(3));

    return area1 + area2;
  }
Exemplo n.º 2
0
  public static boolean isCardShaped(List<Point2D_I32> contour) {
    // turn it into a quad
    List<Point2D_F64> f64Contour = new ArrayList<Point2D_F64>();
    for (Point2D_I32 point : contour) {
      f64Contour.add(new Point2D_F64(point.x, point.y));
    }

    List<Point2D_F64> quad;
    try {
      quad = boofcv.alg.feature.detect.quadblob.FindBoundingQuadrilateral.findCorners(f64Contour);
    } catch (Exception e) {
      System.out.println("finding corners of bounding quadrilateral failed");
      return false;
    }

    Double ratio = aspectRatio(quad);
    if (ratio == null) {
      return false;
    }
    if (Math.min(ratio, TARGET_ASPECT_RATIO) / Math.max(ratio, TARGET_ASPECT_RATIO)
        < ASPECT_RATIO_TOLERANCE) {
      return true;
    }
    return false;
  }
Exemplo n.º 3
0
  public static int areaOfRegion(List<Point2D_F64> list) {
    List<Point2D_F64> quad;
    try {
      quad = boofcv.alg.feature.detect.quadblob.FindBoundingQuadrilateral.findCorners(list);
    } catch (Exception e) {
      System.out.println("finding corners of bounding quadrilateral failed");
      return -1;
    }

    double triangleArea0 =
        boofcv.alg.feature.detect.quadblob.FindBoundingQuadrilateral.area(
            quad.get(0), quad.get(1), quad.get(2));
    double triangleArea1 =
        boofcv.alg.feature.detect.quadblob.FindBoundingQuadrilateral.area(
            quad.get(0), quad.get(3), quad.get(2));

    return (int) Math.round(triangleArea1 + triangleArea0);
  }
Exemplo n.º 4
0
 // convert a blob image into quadrilaterals bounding each of the blobs
 public static List<List<Point2D_F64>> quadsFromBlobs(ImageSInt32 blobImage, int numBlobs) {
   @SuppressWarnings("unchecked")
   List<List<Point2D_F64>> points = new ArrayList();
   for (int i = 1; i < numBlobs; i++) {
     // TODO: make fast
     ArrayList<Point2D_F64> inClass = new ArrayList<Point2D_F64>();
     for (int x = 0; x < blobImage.getWidth(); x++) {
       for (int y = 0; y < blobImage.getHeight(); y++) {
         if (blobImage.get(x, y) == i) {
           inClass.add(new Point2D_F64(x, y));
         }
       }
     }
     // Transform blobs into quadrilaterals, ignoring blobs of very small size
     if (inClass.size() > BLOB_SIZE_THRESHOLD) {
       points.add(
           boofcv.alg.feature.detect.quadblob.FindBoundingQuadrilateral.findCorners(inClass));
     }
   }
   return points;
 }