add logo image

README.md

@@ -1,19 +1,18 @@
 # Octreelib
 
-Octreelib is a Python library for working with octrees.
-It is capable of processing point clouds and using octrees to store them.
-It is also capable of working with a grid of octrees of fixed resolution and processing multiple distinct point clouds
-in the same grid synchronizing their subdivision schemes.
-
-
 [![tests](https://github.com/prime-slam/octreelib/actions/workflows/python-package.yml/badge.svg?branch=main)](https://github.com/prime-slam/octreelib/actions/workflows/python-package.yml)
 [![Code style: black](https://img.shields.io/badge/code%20style-black-black)]()
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 [![License: Apache License 2.0](https://img.shields.io/github/license/saltstack/salt)](https://opensource.org/license/apache-2-0/)
 
+<image src="./.github/image.png" height="180">
 
+Octreelib is a Python library for working with octrees.
+It is capable of processing point clouds and using octrees to store them.
+It is also capable of working with a grid of octrees of fixed resolution and processing multiple distinct point clouds
+in the same grid synchronizing their subdivision schemes.
 
-## Installation
+# Installation
 
 To install the latest version of the library, run