Jiapan Wang

 Dear py4dgeo team, Here's a ZeroDevisionError happened during seeds auto-detection step if there's only one neighbor surrounding seed candidate. Related code: https://github.com/3dgeo-heidelberg/py4dgeo/blob/01d2ded31f56ef4dd62976694e13c409d35a5d45/src/py4dgeo/segmentation.py#L988 Possible solution: ```python # avoid float division...