Connecting a few objects on one image

Hello, I have an image of a few plants and I want to measure centroids of each one. Unfortunately some plants are separated to few objects and I can't measure centroid of whole plant. Do you have some ideas how can I connect objects together to finnaly recive image like this one?

Answer 1

[Walter Roberson]

dilate with a structuring element that is a disk of diameter which is the maximum distance apart that you want to join the objects. You can then erode again.

A short form is to use imclose