FoSp: Focus and Separation Network for Early Smoke Segmentation

This repository is the implementation of our AAAI-24 paper: FoSp: Focus and Separation Network for Early Smoke Segmentation.

Abstract

Early smoke segmentation (ESS) enables the accurate identification of smoke sources, facilitating the prompt extinguishing of fires and preventing large-scale gas leaks. But ESS poses greater challenges than conventional object and regular smoke segmentation due to its small scale and transparent appearance, which can result in high miss detection rate and low precision. To address these issues, a Focus and Separation Network (FoSp) is proposed. We first introduce a Focus module employing bidirectional cascade which guides low-resolution and high-resolution features towards mid-resolution to locate and determine the scope of smoke, reducing the miss detection rate. Next, we propose a Separation module that separates smoke images into a pure smoke foreground and a smoke-free background, enhancing the contrast between smoke and background fundamentally, improving segmentation precision. Finally, a Domain Fusion module is developed to integrate the distinctive features of the two modules which can balance recall and precision to achieve high F_beta. Futhermore, to promote the development of ESS, we introduce a high-quality real-world dataset called SmokeSeg, which contains more small and transparent smoke than the existing datasets. Experimental results show that our model achieves the best performance on three available smoke segmentation datasets.

FoSp Overview

Concentrating on the formulation of smoke images, we first introduce a Focus module employing bidirectional cascade which guides low-resolution and high-resolution features towards mid-resolution to locate and determine the scope of smoke, reducing the miss detection rate. Next, we propose a Separation module that separates smoke images into a pure smoke foreground and a smoke-free background, enhancing the contrast between smoke and background fundamentally, improving segmentation precision. Finally, a Domain Fusion module is developed to integrate the distinctive features of the two modules which can balance recall and precision to achieve high F_beta. The proposed model pipeline is:

Visualization

It can be observed that our FoSp can obtain finer foreground for both small and transparent smoke.

Main code infrastructure

fosp_config.py
- This script establishes the general configuration of FoSp, encompassing dataset, training, and testing settings, among others.
FOSP_main.py
- This script includes the implementation of Bidirectional Cascade Generator (BCG), Separation module, and Domain Fusion module in our FoSp method.

Prerequisites

Linux
Python 3.8
PyTorch 1.8.0
Cuda 11.1
GCC 7.3.0+

Installation

Step 1. create new environment.

conda create -n FoSp python=3.8 -y
conda activate FoSp

Step 2. Install MMCV using MIM.

pip install -U openmim
mim install mmcv-full

Step 3. Install FoSp.

cd FoSp
pip install -v -e .

Step 4. Install other packages.

pip install -r requirements.txt

Dataset preparation

The Dataset structure employs the file directory format of the PASCAL VOC. We have utilized a limited number of images as training examples. If you need to use your own dataset, please switch it to this format.

FoSp
├── mmseg
├── tools
├── config
├── data
│   ├── {Your Dataset}
│   │   ├── JPEGImages
│   │   ├── SegmentationClass
│   │   ├── ImageSets
│   │   │   ├── Segmentation

Training

python tools/train.py config/fosp_config.py

Evaluation

python tools/test.py --config ${path/to/config} --checkpoint ${path/to/checkpoint}

LujianYao / FoSp