Update README.md

README.md

@@ -50,3 +50,7 @@ I have selected every svg image from svgen that would rasterize under cairosvg,
 
 This is the 1st of many SVG datasets I am collecting, extracting, and rasterizing in an attempt to produce a meaningfully helpful spatial reasoning and vertex manipulation model.
 
+# Usage
+
+The rasterized images are in PNG format, as bytes. They may be extracted through the creation of an `io.BytesIO` instance on the bytes then running `Image.open` on the byte stream. They could also be written to disk first for convenience and storage.
+