# longcw/yolo2-pytorch

YOLOv2 in PyTorch

Repository: https://github.com/longcw/yolo2-pytorch
Canonical: https://ross.abutalabs.com/products/yolo2-pytorch
Language: Python
License Family: other
Topics: pytorch, yolo, yolo2, darknet, detection
Last push: 2021-09-29T09:54:02+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": 3478, "days_push": 1799, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1560, forks 413 (observed 2026-08-28T04:05:03.749454+00:00)

## What it is
A PyTorch implementation of the YOLOv2 real-time object detection model, based on darknet and darkflow. It includes training and inference code for datasets like Pascal VOC, with a Cython postprocessing extension for speed.

## Use cases
- run YOLOv2 object detection in PyTorch
- train YOLOv2 on a custom dataset
- convert darknet YOLO weights to PyTorch
- detect objects in images with a pretrained VOC model
- study a YOLOv2 reference implementation
- benchmark YOLOv2 inference speed on VOC2007

## When to choose
- you specifically need YOLOv2 architecture in PyTorch for research or reproduction
- you want a readable reference implementation of YOLOv2 training and inference
- you are working with legacy PyTorch (<=0.4) codebases

## When to avoid
- you need a maintained library compatible with modern PyTorch versions
- you want state-of-the-art detection accuracy or newer YOLO variants
- you need production-ready object detection with community support
- you require a permissively licensed dependency, since no license is specified

## Facets
- artifact type: library
- maturity: abandoned
- function: machine-learning, deep-learning, computer-vision, image-processing
- domain: deep-learning, computer-vision, machine-learning, image-processing
- platform: python, cross-platform
- tags: object-detection, yolo, yolov2, pytorch, darknet, pascal-voc, real-time-detection, no-longer-maintained, gpu, linux

## Member repositories
- longcw/yolo2-pytorch (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:03.749454+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 2026-08-30T04:29:47.276784+00:00, confidence not recorded.
  - readme: https://github.com/longcw/yolo2-pytorch (fetched 2026-08-28T04:05:03.749454+00:00, sha 73ab79b1d575)
- Data as of 2026-08-30T08:39:29.467469+00:00.