fissa.polygons module#
Polygon tools.
Changed in version 1.0.0: Module renamed from fissa.ROI to fissa.polygons.
The functions below were adapted from the sima package http://www.losonczylab.org/sima, version 1.3.0. https://github.com/losonczylab/sima/blob/1.3.0/sima/ROI.py
License
This file is Copyright (C) 2014 The Trustees of Columbia University in the City of New York.
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.
- fissa.polygons.poly2mask(polygons, im_size)[source]#
Convert polygons to a sparse binary mask.
>>> from fissa.polygons import poly2mask >>> poly1 = [[0, 0], [0, 1], [1, 1], [1, 0]] >>> poly2 = [[0, 1], [0, 2], [2, 2], [2, 1]] >>> mask = poly2mask([poly1, poly2], (3, 3)) >>> mask[0].todense() matrix([[ True, False, False], [ True, True, False], [False, False, False]], dtype=bool)
- Parameters
- polygonssequence of coordinates or sequence of Polygons
A sequence of polygons where each is either a sequence of
(x, y)or(x, y, z)coordinate pairs, an Nx2 or Nx3 numpy array, or a Polygon object.- im_sizetuple
Final size of the resulting mask.
- Returns
- maskslist of sparse matrices
A list of sparse binary masks of the points contained within the polygons, one mask per plane. Each mask is in linked list sparse matrix format.