readme update

README.md

@@ -1,4 +1,17 @@
 # Convert image to cross patterns
+
+Setup:
+```
+pip3 install -r requirements.txt
+```
+
+Script does the following steps:
+1. Tune image contrast.
+2. Reduce number of image colors.
+3. Map remaining color to closest flosses.
+4. Render and save results.
+
+Script arguments:
 ```
 usage: main.py [-h] [--image IMAGE] [--enhance ENHANCE] [--width WIDTH]
                [--max_colors MAX_COLORS] [--show SHOW]
@@ -12,3 +25,9 @@ optional arguments:
                         Max number of flosses to use.
   --show SHOW           Whether to show result in separate window.
 ```
+
+Example image:
+![input image](data/image.jpg)
+
+Result of running `python3 ./main.py`:
+![scheme image](data/scheme.jpg)