Semantic Segmentation using UNET

This is the implementation of UNET on Carvana Image Masking Kaggle Challenge

About the Dataset

This dataset contains a large number of car images (as .jpg files). Each car has exactly 16 images, each one taken at different angles.

For the training set, you are provided a .gif file that contains the manually cutout mask for each image. Link to download the dataset: Here

Downloading the trained Model:

Here

UNET Architecture

The UNET CNN architecture may be divided into the Encoder, Bottleneck and Decoder blocks, followed by a final segmentation output layer.

• Encoder: There are 4 Encoder blocks, each consisting of a convolutional block followed by a Spatial Max Pooling layer.
• Bottleneck: The Bottleneck consists of a single convolutional block.
• Decoder: There are 4 Decoder blocks, each consisting of a deconvolution operation, followed by a convolutional block, along with skip connections.

Note: The convolutional block consists of 2 conv2d operations each followed by a BatchNorm2d, finally followed by a ReLU activation.

Implementation Details

• Image preprocessing included augmentations like HorizontalFlip, VerticalFlip, Rotate.
• Dataloader object was created for both training and test data
• Training process was carried out for 10 epochs, using the Adam Optimizer with a Learning Rate 1e-4.
• Validation was carried out using Dice Loss and Intersection over Union Loss.

Installation and Quick Start

To use the repo and run inferences, please follow the guidelines below

• Cloning the Repository:

    $ git clone https://github.com/anushka17agarwal/Segmentation_UNET
  

• Entering the directory:

    $ cd unet/
  

• Setting up the Python Environment with dependencies:

    $ pip install -r requirements.txt
  

• Running the file for inference:

    $ python3 train.py
  

Accuracy Scores

• Got 38967548.0/39091200 with acc 99.68Dice score: 0.9924604296684265