update of README file

README.md

@@ -53,7 +53,7 @@ Zellige performs projection of multiple surfaces of interest on a 2D plane from
 on 1-channel 3D images presenting one or several surfaces. The program takes a 3D stack as input and generates the
 projection of all surfaces contained in the 3D stack as 2D images. That process can be divided into 3 stages :
 
-![ZelligePipeline](doc/zellige_pipeline.jpg = 200 x 200)
+![ZelligePipeline](doc/zellige_pipeline.jpg)
 
 - first the selection of all the pixels belonging to any surface
 - second the regrouping of those selected pixels to produce a **height map** for each surface
@@ -67,9 +67,13 @@ value of these planes.
 ## Example datasets
 
 https://zenodo.org/record/6376584
+
 https://zenodo.org/record/6376594
+
 https://zenodo.org/record/6376582
+
 https://zenodo.org/record/6376566
+
 https://zenodo.org/record/6376542
 
 ## Usage