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deftruth/soft-nms-1

Analysis updated 2026-07-06 · repo last pushed 2019-01-10

1PythonAudience · developerComplexity · 2/5DormantSetup · moderate

TLDR

A Python tool that cleans up duplicate bounding boxes from object detection models by gradually lowering confidence scores of overlapping boxes instead of deleting them outright.

Mindmap

mindmap
  root((repo))
    What it does
      Reduces duplicate boxes
      Lowers overlap scores
      Keeps best predictions
    How it works
      Penalizes overlapping boxes
      Removes below threshold
      Based on research paper
    Use cases
      Traffic camera detection
      Crowded scene detection
      Object detection cleanup
    Tech stack
      Python
    Audience
      Developers with pipelines
      Computer vision engineers
    Setup
      Minimal utility
      No detailed install docs
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What do people build with it?

USE CASE 1

Improve object detection accuracy in traffic camera footage by filtering duplicate boxes around cars and pedestrians.

USE CASE 2

Clean up overlapping bounding boxes in crowded scenes where people or vehicles are close together.

USE CASE 3

Integrate into an existing object detection pipeline to refine model output before final results.

What is it built with?

Python

How does it compare?

deftruth/soft-nms-1a-bissell/unleash-liteabhiinnovates/whatsapp-hr-assistant
Stars111
LanguagePythonPythonPython
Last pushed2019-01-10
MaintenanceDormant
Setup difficultymoderatehardhard
Complexity2/54/53/5
Audiencedeveloperresearcherdeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · moderate Time to first run · 30min

No installation instructions or usage examples are provided, so you need prior knowledge of object detection pipelines to integrate it.

No license information is provided in the repository, so usage rights are unclear.

In plain English

When a computer vision model detects objects in an image, it often generates many overlapping bounding boxes around the same object. Soft-NMS is a Python implementation of an algorithm designed to clean up this redundancy. Instead of simply deleting overlapping boxes, it gradually reduces their confidence scores, keeping the best prediction while gracefully filtering out the duplicates. At a high level, traditional methods look at overlapping boxes and keep the one with the highest confidence score while discarding the rest entirely. This can be problematic when two objects are close together, causing a valid detection to be removed. This project's approach softly penalizes overlapping boxes by lowering their scores rather than eliminating them immediately. If a box overlaps heavily with a higher-scoring box, its score is reduced significantly. If it only slightly overlaps, it receives a minor penalty. Once scores drop below a certain threshold, the box is finally removed. Someone building an object detection system would use this to improve the accuracy of their model's output. For example, if you are developing software that identifies cars and pedestrians in traffic camera footage, your model might produce several overlapping boxes around a single car before applying any filtering. Plugging in this implementation helps the system keep the correct bounding boxes while filtering out duplicates, which is especially useful when people or vehicles are standing close to one another. The README doesn't go into detail about installation, specific usage examples, or performance benchmarks. It simply notes that the project is a Python implementation based on a research paper titled "Improving Object Detection With One Line of Code." This suggests it is a fairly minimal, straightforward utility intended for developers who already have a basic object detection pipeline in place and understand how to integrate it into their existing workflow.

Copy-paste prompts

Prompt 1
Help me integrate Soft-NMS into my existing object detection pipeline. I have bounding boxes with confidence scores and need to apply soft non-maximum suppression to remove duplicates.
Prompt 2
I have a list of bounding boxes and confidence scores from my object detection model. Write code to apply the Soft-NMS algorithm that gradually reduces scores of overlapping boxes instead of deleting them.
Prompt 3
Explain how to use the soft-nms-1 Python package to filter duplicate detections when two objects like cars and pedestrians are close together in traffic camera footage.

Frequently asked questions

What is soft-nms-1?

A Python tool that cleans up duplicate bounding boxes from object detection models by gradually lowering confidence scores of overlapping boxes instead of deleting them outright.

What language is soft-nms-1 written in?

Mainly Python. The stack also includes Python.

Is soft-nms-1 actively maintained?

Dormant — no commits in 2+ years (last push 2019-01-10).

What license does soft-nms-1 use?

No license information is provided in the repository, so usage rights are unclear.

How hard is soft-nms-1 to set up?

Setup difficulty is rated moderate, with roughly 30min to a first successful run.

Who is soft-nms-1 for?

Mainly developer.

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