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README.md

@@ -33,3 +33,16 @@ conda develop install .
 #or with pip
 pip install --editable .
 ```
+
+## Cluster file specifications
+
+```
+[int32 frame_number][int32 n_clusters][clusters....]
+
+// Cluster data type
+typedef struct {
+  int16_t x;
+  int16_t y;
+  int32_t data[9];
+} Cluster ;
+```