Update README.md

README.md

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 This is a data processor for the Community Forensics classifiers. Detailed instructions will be updated at the [Community Forensics GitHub_repo](https://github.com/JeongsooP/Community-Forensics) in the future.
+
+### Simple usage example. 
+`dataprocessor_hf.py` is included in this repository.
+```python
+import dataprocessor_hf as dphf
+from PIL import Image
+data_processor = dphf.CommForImageProcessor.from_pretrained('OwensLab/commfor-data-preprocessor', size=384)
+img = Image.open('path_to_img.png')
+processed_image = data_processor(img, mode='test')
+
+```