Create README.md

tutorials/09 - Image Captioning/README.md

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+## Usage 
+
+
+#### 1. Clone the repositories
+```bash
+$ git clone https://github.com/pdollar/coco.git
+$ git clone https://github.com/yunjey/pytorch-tutorial.git
+$ cd pytorch-tutorial/tutorials/09 - Image Captioning
+```
+
+#### 2. Download the dataset
+
+```bash
+$ pip install -r requirements
+$ chmod +x download.sh
+$ ./donwload.sh
+```
+
+#### 3. Preprocessing
+
+```bash
+$ python vocab.py    
+```
+
+#### 4. Train the model
+
+```bash
+$ python train.py    
+```
+
+#### 5. Generate captions
+If you want to generate captions from MSCOCO validation dataset, see [evaluate_model.ipynb](https://github.com/yunjey/pytorch-tutorial/blob/master/tutorials/09%20-%20Image%20Captioning/evaluate_model.ipynb). Otherwise, if you want to generate captions from custom image file, run command as below.
+
+```bash
+$ python sample.py --image=sample_image.jpg     
+```
+
+<br>
+
+## Pretrained model 
+
+If you do not want to train the model yourself, you can use a pretrained model. I have provided the pretrained model as a zip file. You can download the file [here](https://www.dropbox.com/s/cngzozkk73imjdh/trained_model.zip?dl=0) and extract it to `model` directory.