added image and example

README.md

@@ -1,3 +1,40 @@
 # SPECARRAY
 
-To read hyperspectral data from Specim devices. Currently only tested with FX10 data
+To read hyperspectral data from Specim devices. Currently only tested with FX10 data
+
+## Core features
+
+* read Specim FX10 data
+* support for large files thanks to dask
+* using xarray for data storage
+* computaiton of spectral albedo and braodband albedo
+
+## Installation
+
+```bash
+pip install specarray
+```
+
+## Usage
+
+```python
+from specarray import SpecArray
+from pathlib import Path
+import matplotlib.pyplot as plt
+
+data_dir = Path("data/white_weathering_crust_2_2023-07-15_15-25-24/")
+
+white_weathering_crust = SpecArray(data_dir)
+
+white_weathering_crust.capture
+
+white_weathering_crust.spectral_albedo.sel(sample=0, point=0).plot.line()
+plt.ylim(0, 1)
+```
+
+The resulting imgage should look like this:
+![Spectrum](images/output.png)
+
+
+
+For more examples see the [notebooks](notebooks) folder.