Python pyclipper.CT_INTERSECTION Examples

The following are 5 code examples of pyclipper.CT_INTERSECTION(). You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may also want to check out all available functions/classes of the module pyclipper , or try the search function .
Example #1
Source File: clippers.py    From geomeppy with MIT License 6 votes vote down vote up 
def intersect(self, poly):
        # type: (Polygon) -> List[Polygon]
        """Intersect with another polygon.

        :param poly: The clip polygon.
        :returns: False if no intersection, otherwise a list of Polygons representing each intersection.

        """
        clipper = self._prepare_clipper(poly)
        if not clipper:
            return []
        intersections = clipper.Execute(
            pc.CT_INTERSECTION, pc.PFT_NONZERO, pc.PFT_NONZERO
        )

        return self._process(intersections)
Example #2
Source File: metrics.py    From P2PaLA with GNU General Public License v3.0 6 votes vote down vote up 
def poly_intersect(subj, clip):
    """
    """
    pc = pyclipper.Pyclipper()
    pc.AddPath(clip, pyclipper.PT_CLIP, True)
    pc.AddPath(subj, pyclipper.PT_SUBJECT, True)
    solution = pc.Execute(
        pyclipper.CT_INTERSECTION, pyclipper.PFT_EVENODD, pyclipper.PFT_EVENODD
    )
    return np.array(solution)
Example #3
Source File: evaluation.py    From keras-ocr with MIT License 5 votes vote down vote up 
def iou_score(box1, box2):
    """Returns the Intersection-over-Union score, defined as the area of
    the intersection divided by the intersection over the union of
    the two bounding boxes. This measure is symmetric.

    Args:
        box1: The coordinates for box 1 as a list of (x, y) coordinates
        box2: The coordinates for box 2 in same format as box1.
    """
    if len(box1) == 2:
        x1, y1 = box1[0]
        x2, y2 = box1[1]
        box1 = np.array([[x1, y1], [x2, y1], [x2, y2], [x1, y2]])
    if len(box2) == 2:
        x1, y1 = box2[0]
        x2, y2 = box2[1]
        box2 = np.array([[x1, y1], [x2, y1], [x2, y2], [x1, y2]])
    if any(cv2.contourArea(np.int32(box)[:, np.newaxis, :]) == 0 for box in [box1, box2]):
        warnings.warn('A box with zero area was detected.')
        return 0
    pc = pyclipper.Pyclipper()
    pc.AddPath(np.int32(box1), pyclipper.PT_SUBJECT, closed=True)
    pc.AddPath(np.int32(box2), pyclipper.PT_CLIP, closed=True)
    intersection_solutions = pc.Execute(pyclipper.CT_INTERSECTION, pyclipper.PFT_EVENODD,
                                        pyclipper.PFT_EVENODD)
    union_solutions = pc.Execute(pyclipper.CT_UNION, pyclipper.PFT_EVENODD, pyclipper.PFT_EVENODD)
    union = sum(cv2.contourArea(np.int32(points)[:, np.newaxis, :]) for points in union_solutions)
    intersection = sum(
        cv2.contourArea(np.int32(points)[:, np.newaxis, :]) for points in intersection_solutions)
    return intersection / union
Example #4
Source File: booleanoperationsmixin.py    From beziers.py with MIT License 5 votes vote down vote up 
def intersection(self,other, flat=False):
    """Returns a list of Bezier paths representing the intersection of the two input paths."""
    return self.clip(other, pyclipper.CT_INTERSECTION, flat)
Example #5
Source File: clipping.py    From glmtools with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
def clip_poly_pair(pc, p, q):
    """"
    pc: an instance of pyclipper.Pyclipper.
    p:  the polygon by which to clip other polygon q.

    pc and p may be held fixed through use of functools.partial so that
    multiple q may be clipped by p.
    """
    pc.Clear()
    pc.AddPath(q, pyclipper.PT_SUBJECT, True)
    pc.AddPath(p, pyclipper.PT_CLIP, True)
    clip_polys = pc.Execute(clip_type=pyclipper.CT_INTERSECTION)
    return clip_polys