Update README.md

Author: richzhang

README.md

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-This repo contains demo code to run the colorization model described in: <br>
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 <!--<h3><b>Colorful Image Colorization</b></h3>-->
 <b>Colorful Image Colorization</b> <br>
 [Richard Zhang](https://richzhang.github.io/), [Phillip Isola](http://web.mit.edu/phillipi/), [Alexei A. Efros](http://www.eecs.berkeley.edu/~efros/) <br>
 In [arXiv, 2016](http://arxiv.org/abs/1603.08511) <br>
 [Project Page](http://richzhang.github.io/colorization/)
 
+![Teaser Image](http://richzhang.github.io/colorization/resources/images/teaser3.jpg)
+
 We include demo usage as an iPython notebook, under [./demo/colorization_demo_v0.ipynb](https://github.com/richzhang/colorization/blob/master/demo/colorization_demo_v0.ipynb). Clone the master branch of the respository using `git clone -b master --single-branch https://github.com/richzhang/colorization.git`, `cd` into the `demo` directory, run `ipython notebook` and open `colorization_demo_v0.ipynb` in your web browser.
 
 This demo code requires a working installation of [Caffe](http://caffe.berkeleyvision.org/) and basic Python libraries (numpy, pyplot, skimage, scipy). For guidelines and help with installation of Caffe, consult the [installation guide](http://caffe.berkeleyvision.org/) and [Caffe users group](https://groups.google.com/forum/#!forum/caffe-users).