Attribute: polygons (list[ndarray]): list[ndarray]: polygons for this mask. Each ndarray has format [x, y, x, y, ...] mask (ndarray): a binary mask
| 57 | |
| 58 | |
| 59 | class GenericMask: |
| 60 | """ |
| 61 | Attribute: |
| 62 | polygons (list[ndarray]): list[ndarray]: polygons for this mask. |
| 63 | Each ndarray has format [x, y, x, y, ...] |
| 64 | mask (ndarray): a binary mask |
| 65 | """ |
| 66 | |
| 67 | def __init__(self, mask_or_polygons, height, width): |
| 68 | self._mask = self._polygons = self._has_holes = None |
| 69 | self.height = height |
| 70 | self.width = width |
| 71 | |
| 72 | m = mask_or_polygons |
| 73 | if isinstance(m, dict): |
| 74 | # RLEs |
| 75 | assert "counts" in m and "size" in m |
| 76 | if isinstance(m["counts"], list): # uncompressed RLEs |
| 77 | h, w = m["size"] |
| 78 | assert h == height and w == width |
| 79 | m = mask_util.frPyObjects(m, h, w) |
| 80 | self._mask = mask_util.decode(m)[:, :] |
| 81 | return |
| 82 | |
| 83 | if isinstance(m, list): # list[ndarray] |
| 84 | self._polygons = [np.asarray(x).reshape(-1) for x in m] |
| 85 | return |
| 86 | |
| 87 | if isinstance(m, np.ndarray): # assumed to be a binary mask |
| 88 | assert m.shape[1] != 2, m.shape |
| 89 | assert m.shape == (height, width), m.shape |
| 90 | self._mask = m.astype("uint8") |
| 91 | return |
| 92 | |
| 93 | raise ValueError("GenericMask cannot handle object {} of type '{}'".format(m, type(m))) |
| 94 | |
| 95 | @property |
| 96 | def mask(self): |
| 97 | if self._mask is None: |
| 98 | self._mask = self.polygons_to_mask(self._polygons) |
| 99 | return self._mask |
| 100 | |
| 101 | @property |
| 102 | def polygons(self): |
| 103 | if self._polygons is None: |
| 104 | self._polygons, self._has_holes = self.mask_to_polygons(self._mask) |
| 105 | return self._polygons |
| 106 | |
| 107 | @property |
| 108 | def has_holes(self): |
| 109 | if self._has_holes is None: |
| 110 | if self._mask is not None: |
| 111 | self._polygons, self._has_holes = self.mask_to_polygons(self._mask) |
| 112 | else: |
| 113 | self._has_holes = False # if original format is polygon, does not have holes |
| 114 | return self._has_holes |
| 115 | |
| 116 | def mask_to_polygons(self, mask): |
no outgoing calls
no test coverage detected