OmniHuman-1.5 – ByteDance’s digital human animation generation model

What is OmniHuman-1.5？

OmniHuman-1.5 is an advanced AI model launched by ByteDance that can generate expressive digital human animations from a single image and an audio track. The model is based on dual-system cognitive theory, combining a multimodal large language model with a diffusion transformer to simulate both human deliberative thinking and intuitive responses. It can produce dynamic multi-character animations, support refinement through text prompts, and achieve more precise animation effects. OmniHuman-1.5 animations feature complex character interactions and rich emotional expressions, offering new possibilities for animation production and digital content creation while greatly improving creative efficiency and expressiveness.

Main Features of OmniHuman-1.5

Animation Generation: Generate digital human animations from a single image and audio track.
Multi-Character Interaction: Supports multi-character animations with complex interactions between characters.
Emotional Expression: Generated animations display rich emotional expressions, with characters responding appropriately to voice and text prompts.
Text-Based Refinement: Refine and adjust animations through text prompts to improve accuracy and expressiveness.
Dynamic Scenes: Generate dynamic backgrounds and environments, making animations more lively and realistic.

Technical Principles of OmniHuman-1.5

Dual-System Cognitive Theory: Simulates human deliberative thinking (System 2) and intuitive responses (System 1), enabling the model to handle complex logic and intuitive emotional reactions simultaneously.
Multimodal Large Language Model: Processes text and voice inputs, understands context and emotions, and provides semantic guidance for animation generation.
Diffusion Transformer: Generates high-quality animation frames, ensuring smoothness and visual fidelity.
Multimodal Fusion: Integrates images, audio, and text to produce richer and more realistic animations.
Dynamic Adjustment: Enables real-time adjustments of generated animations through text prompts for greater precision.

Project Links

Official Website: https://omnihuman-lab.github.io/v1_5/
arXiv Technical Paper: https://arxiv.org/pdf/2508.19209

Application Scenarios for OmniHuman-1.5

Animation Production: Quickly generate high-quality character animations, reducing production costs and improving creative efficiency.
Game Development: Create natural animations for game characters, enhancing immersion and interactivity.
Virtual Reality (VR) and Augmented Reality (AR): Generate virtual characters and interactive content to improve user experience and engagement.
Social Media and Content Creation: Quickly produce animated content for short videos and live streaming, boosting interactivity and audience engagement.