volumes.py 文件源码

def has_uniform_seed_margin(self, seed_margin=20.0):
        """Test if a subvolume has a margin of uniform label around its seed.

        Parameters
        ----------
        seed_margin : float, optional
            The minimum acceptable margin of uniform target label around the seed
            voxel (in nm, default 20.0).

        Returns
        -------
        bool
            True if the rectangular margin around the seed position is uniform.
        """
        margin = np.ceil(np.reciprocal(np.array(CONFIG.volume.resolution),
                                       dtype=np.float64) * seed_margin).astype(np.int64)

        mask_target = self.label_mask
        # If data is unlabeled, can not test so always succeed.
        if mask_target is None:
            return True
        # Seed location in the mask accounting for offset of label from image.
        ctr = self.seed - (np.asarray(self.image.shape) - np.asarray(mask_target.shape)) // 2
        seed_fov = (ctr - margin, ctr + margin + 1)
        seed_region = mask_target[seed_fov[0][0]:seed_fov[1][0],
                                  seed_fov[0][1]:seed_fov[1][1],
                                  seed_fov[0][2]:seed_fov[1][2]]
        return np.all(seed_region)