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Temporal Tessellation: A Unified Approach for Video Analysis

Implementation of video captioning from the paper "Temporal Tessellation: A Unified Approach for Video Analysis"

Before going further please watch this: ICCV 2017 spotlight

This method has won the Large Scale Movie Description and Understanding Challenge at ECCV 2016.

Dependencies

This code is written in python. To use it you will need:

• Python 2.7
• tensorflow 0.8

Getting data

Getting the data: https://sites.google.com/site/describingmovies/lsmdc-2016/download

Preparing the data

Suppose you have video descriptors and the matching cpations in a shared space. Please refer to:

my_reader.py

For a detailed exaplantaion of how to prepare the data for training.

Note that you will need to set the data directory in

constants.py

Training models

To train your own models, simply run

python driver.py

As the model trains, it will periodically evaluate on the development set and save predicted captions to file.

rnn.Mpiiconfig has many hyperparameters; Descriptions of each hyperparameter follow:

Architecture

• init_scale: weights initial scale.
• num_layers: the LSTM number of layers
• keep_prob: dropout probability of keeping weights.
• hidden_size: LSTM number of units
• input_feature_num: The size of the input to the LSTM

Training

• learning_rate: learning rate initial value
• batch_size: the size of a minibatch.
• max_epoch: number of epochs that were trained with the initial learning rate
• grad_clip: magnitude at which to clip the gradient

Reference

If you found this code useful, please cite the following paper:

Dotan kaufman, Gil levi, Tal Hassner, Lior wolf. "Temporal Tessellation: A Unified Approach for Video Analysis."