HybrIK

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HybrIK is an open-source AI tool that provides a hybrid analytical-neural inverse kinematics solution for 3D human pose and shape estimation. It offers code for research papers and includes a Blender add-on for importing results.

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At a glance

Pricing

Open Source

Free tier

Yes

API

Skill level

Technical

About

What is HybrIK?

HybrIK is an open-source project offering a hybrid analytical-neural inverse kinematics (IK) solution for 3D human pose and shape estimation. It provides the official code for the research papers "HybrIK: A Hybrid Analytical-Neural Inverse Kinematics Solution for 3D Human Pose and Shape Estimation" (CVPR 2021) and "HybrIK-X: Hybrid Analytical-Neural Inverse Kinematics for Whole-body Mesh Recovery" (TPAMI 2025). The tool allows users to convert accurate 3D keypoints into parametric body meshes. Key features include demo code for visualizing HybrIK on videos and images, support for both SMPL and SMPL-X models, and a Blender add-on for importing results as FBX files. It also supports multi-person demos with pose-tracking and provides pretrained models with various backbones.

Best used for

Ideal for developers and data scientists who need to implement advanced 3D human pose and shape estimation, recover body meshes from 3D keypoints, and visualize human motion. Especially valuable for researchers in computer vision and those developing applications requiring precise human body tracking or animation.

Common actions

estimate 3D pose

recover body mesh

visualize human motion

integrate 3D models

face swapping"AI Agents"github copilotcollaborationlow-code/no-codeopen-sourceworkflowsautomated workflowdeepfake

Capabilities

Key features

3D human pose estimation
Body mesh recovery
Video/image visualization
Blender add-on
Multi-person pose tracking
Pretrained models

Target Audience

developerdata scientist

Integrations

blender

Pricing & Plans

Open Source

Free

FAQs

What is the primary function of HybrIK?

HybrIK provides a hybrid analytical-neural inverse kinematics solution for 3D human pose and shape estimation. It converts accurate 3D keypoints into parametric body meshes, enabling detailed analysis and visualization of human motion and form.

Can HybrIK be used for multi-person pose tracking?

Yes, HybrIK supports multi-person demos with pose-tracking capabilities. It has been integrated into Alphapose, allowing for the estimation of poses and shapes for multiple individuals within a scene.

Does HybrIK offer any integration with 3D modeling software?

Yes, HybrIK provides a Blender add-on that allows users to import the output of HybrIK, such as recovered body meshes, directly into Blender. These results can then be saved as FBX files for further use.

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