# ShuLiu1993/PANet

PANet for Instance Segmentation and Object Detection

Repository: https://github.com/ShuLiu1993/PANet
Canonical: https://ross.abutalabs.com/products/panet
Language: Python
License: MIT
License Family: permissive
Topics: instance-segmentation, object-detection
Last push: 2019-03-17T12:59:59+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2920, "days_push": 2726, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1347, forks 278 (observed 2026-08-28T04:04:27.636997+00:00)

## What it is
A PyTorch re-implementation of PANet (Path Aggregation Network), the CVPR 2018 paper that won 1st place in the COCO 2017 Instance Segmentation Challenge. Built on Detectron.pytorch, it provides training and testing code for instance segmentation and object detection models.

## Use cases
- run instance segmentation on COCO images
- train an object detection model with path aggregation
- reproduce PANet challenge-winning results
- use PANet as a baseline for segmentation research
- fine-tune a pretrained instance segmentation model
- compare feature pyramid architectures for detection

## When to choose
- you need a proven high-accuracy instance segmentation baseline in PyTorch
- you want to reproduce or extend the PANet paper
- you are already using Detectron.pytorch and want PANet features

## When to avoid
- you need a maintained library with recent PyTorch support (code targets PyTorch 0.4.0)
- you want a simple out-of-the-box inference tool rather than a research codebase
- you need multi-GPU synchronized batch normalization as in the original paper

## Facets
- artifact type: library
- maturity: maintenance
- function: machine-learning, computer-vision, image-processing
- domain: computer-vision, deep-learning, machine-learning
- platform: python
- tags: instance-segmentation, object-detection, pytorch, cvpr-2018, coco, panet, research-code, linux, gpu

## Member repositories
- ShuLiu1993/PANet (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:27.636997+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:42:36.094571+00:00, confidence not recorded.
  - readme: https://github.com/ShuLiu1993/PANet (fetched 2026-08-28T04:04:27.636997+00:00, sha 0e83c1722445)
- Data as of 2026-08-30T08:39:29.467469+00:00.