Implementation of UNET architecture for Image Segmentation.

Overview

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

UNET Architecture

alt text

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
    
Owner
Anushka agarwal
Anushka agarwal
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