_bitmap: single map with shape (1, H, W), whose values are binarized as {0, 1}

_bitmap: single map with shape (1, H, W), whose values are binarized as {0, 1}

requied keys: image, polygons, ignore_tags, filename adding keys: mask

compute area of a polygon :param poly: :return:

compute area of a polygon :param poly: :return:

compute area of a quad.

Restore quad.

shrink poly with given length.

shrink poly with given length.

shrink poly with given length.

Standard nms.

* The standard NMS algorithm. */

* The standard NMS algorithm. */

Validates that the points that the 4 points that dlimite a polygon are in clockwise order.

Validate the format of the line. If the line is not valid an exception will be raised. If maxWidth and maxHeight are specified, all points mu

Weighted merge.

If set, the array is writeable (otherwise the buffer is read-only)

If set, the array is writeable (otherwise the buffer is read-only)

If set, the array is writeable (otherwise the buffer is read-only)