Instance Segmentation Python Packages

ultralytics

Ultralytics YOLO27, YOLO26, YOLO11, YOLOv8 — object detection, instance segmentation, semantic segmentation, image classification, pose estimation, object tracking

supervision

We write your reusable computer vision tools. 💜

rfdetr

RF-DETR is a real-time object detection and segmentation model architecture developed by Roboflow, SOTA on COCO, designed for fine-tuning. [ICLR 2026]

sahi

Framework agnostic sliced/tiled inference + interactive ui + error analysis plots

mmdet

OpenMMLab Detection Toolbox and Benchmark

imgviz

Rich Image Visualization with Minimum Dependency (no OpenCV, Matplotlib)

inference-sdk

Turn any computer or edge device into a command center for your computer vision projects.

albumentationsx

Image augmentation for computer vision. AGPL-3.0-only or commercial licensing.

hotcoco

Perception evaluation toolkit in Rust with Python bindings. A pycocotools drop-in for COCO, LVIS, and Open Images detection metrics, up to 36× faster, plus TIDE error analysis, confusion matrices, calibration, model comparison, and a dataset browser.

vernier

A modern toolkit to evaluate 2D detection and segmentation models

mask-rcnn-12rics

Mask R-CNN for object detection and instance segmentation on Keras and TensorFlow

ultralytics-opencv-headless

Ultralytics YOLO27, YOLO26, YOLO11, YOLOv8 — object detection, instance segmentation, semantic segmentation, image classification, pose estimation, object tracking

inference

Turn any computer or edge device into a command center for your computer vision projects.

inference-gpu

Turn any computer or edge device into a command center for your computer vision projects.

ncolor

Fast 4-coloring of instance segmentation label images (N-color relabeling) for Python, C++ core

inference-cli

Turn any computer or edge device into a command center for your computer vision projects.

inference-cpu

Turn any computer or edge device into a command center for your computer vision projects.

inference-core

Turn any computer or edge device into a command center for your computer vision projects.

libreyolo

LibreYOLO is a MIT licensed open source computer vision library

coralnet-toolbox

Human-in-the-Loop Annotation and Model Development for Benthic Imagery

autodistill

Images to inference with no labeling (use foundation models to train supervised models).

x-anylabeling-cvhub

X-AnyLabeling: A lightweight, efficient, and unified cross-platform desktop application for annotating text, image, video, and multimodal data, combining versatile built-in tools with state-of-the-art AI models and flexible multi-format export.

tidecv

A General Toolbox for Identifying Object Detection Errors

biapy

Open source Python library for building bioimage analysis pipelines