Update README.md

Author: tsenst

README.md

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 ![Dataset samples](doc/sample.png)
-## CrowdFlow Dataset
-Optical Flow Dataset and Evaluation Kit for Visual Crowd Analysis desciribed in the AVSS 2018 paper 
+## TUB CrowdFlow Dataset
+Optical Flow Dataset and Evaluation Kit for Visual Crowd Analysis developed at [Communication Systems Group](https://www.nue.tu-berlin.de/) at TU-Berlin desciribed in the AVSS 2018 paper 
 [Optical Flow Dataset and Benchmark for Visual Crowd Analysis](http://elvera.nue.tu-berlin.de/files/1548Schr%C3%B6der2018.pdf).
 
 This evaluation framework is released under the MIT License (details in [LICENSE](LICENSE)).