Predictive Frame Inference (PIF) Model

License

PIF-Model is licensed under Apache Software License, Version 2.0.

Authors

• Chidera Biringa [biringachidera@gmail.com]
• Josue N Rivera [josue.n.rivera@outlook.com]
• Russell Thompson [rjsemail22@gmail.com]

Installation

$ git clone https://github.com/biringaChi/PIF-Model
$ sudo pip3 install -r requirements.txt

Description

In this project, we built an AI model that could infer a new frame between two existing sequential frames of a video We trained a GAN neural network framework using youtube footage to predict it’s own existing frames The model which was created was able to infer new frames from high definition videos

Methodology

• Model

  • Trained using GAN
  • Convolutional Neural Network Model with multiple input
  • Images are encoded and decoded

• Tools / Resources

  • PyTorch was used to build the models
  • Royalty-free videos was collected from Youtube

• Performance Measure

  • Pixels distance was used as a potential loss for the generator and metric to measure difference
  • BSE was used as the loss for the model

• Dataset

  • Videos was split into subset of 3 continuous frames
  • The model will be trained to predict the current frame by using the previous and next frame in the video
  • The model was able to generate new frames from the data distribution
  • Stitching technique was implemented to build the videos

Run Sample

$ cd data_prep/
$ python3 data_sample.py

32 samples from dataset

• Scene Detection
  • Contiguous frame sequences were used by comparing the difference each scene to the next using
  • The spikes indicate transitions or new scenes. These were used as markers to tell the model where not to infer new frames

Results

Run Model

$ cd inference/
$ python3 infer.py

Inferred Frames from Model

• Generator and discriminator in a GAN model cause severe loss when creating new frames
• Theorized backpropagation through the generator and discriminator was causing information to be lost.
• The model was modified to exclude the discriminator and only back propagate the generator

Inferred Sequences from new Model

Performance

Video Frames Difference

• The predominant difference between the original video frames and the generated is in the pixel intensity distribution
• We captured the overall objects and structure of the frames

Final Video Generation

Original

Generated