---
title: JoyAI-Image-Edit-Space
emoji: 🚀
colorFrom: indigo
colorTo: pink
sdk: gradio
sdk_version: "6.5.1"
python_version: "3.10"
app_file: app.py
pinned: false
---
JoyAI-Image
Awakening Spatial Intelligence in Unified Multimodal Understanding and Generation
[](https://joyai-image.s3.cn-north-1.jdcloud-oss.com/JoyAI-Image.pdf)
[](https://github.com/jd-opensource/JoyAI-Image)
[](https://huggingface.co/jdopensource/JoyAI-Image-Edit)
[](LICENSE)
## 🔥🔥🔥 News!!
* 2026.04.02: 🎉 We release the JoyAI-Image-Edit weights. Please Check at [Huggingface](https://huggingface.co/jdopensource/JoyAI-Image-Edit).
## 🐶 JoyAI-Image
JoyAI-Image is a **unified multimodal foundation model** for image understanding, text-to-image generation, and instruction-guided image editing. It combines an 8B Multimodal Large Language Model (MLLM) with a 16B Multimodal Diffusion Transformer (MMDiT). A central principle of JoyAI-Image is the **closed-loop collaboration between understanding, generation, and editing**. Stronger spatial understanding improves grounded generation and contrallable editing through better scene parsing, relational grounding, and instruction decomposition, while generative transformations such as viewpoint changes provide complementary evidence for spatial reasoning.
## 📦 Model Zoo
| Models | Task | Description | Download Link |
|----------------------|--------------------------|-----------------------------------------------------------------------------|-----------------|
| JoyAI-Image-Und | Multimodal Understanding | A text–image understanding backbone that enables high-fidelity spatial reasoning and editing-aware perception. | 🤗[Hugging Face](https://huggingface.co/jdopensource/JoyAI-Image-Edit/tree/main/JoyAI-Image-Und) |
| JoyAI-Image-Edit | Image Editing | An instruction-guided image editing model with precise and controllable spatial manipulation. | 🤗[Hugging Face](https://huggingface.co/jdopensource/JoyAI-Image-Edit) |
| JoyAI-Image-Edit-Plus | Multi-Image Editing | An instruction-guided model that supports multi-image editing, enabling cross-image composition, consistency, and joint manipulation. | To be released |
| JoyAI-Image | Text-to-Image | A high-quality text-to-image generation model with strong multi-view consistency. | To be released |
## 💎 Highlights
- **Unified multimodal foundation**: one model family for understanding, generation, and editing through a shared MLLM-MMDiT interface.
- **Practical data and training recipe**: a scalable pipeline with spatial understanding data ([OpenSpatial](https://github.com/VINHYU/OpenSpatial)), long-text rendering data, editing data ([SpatialEdit](https://github.com/EasonXiao-888/SpatialEdit)), and multi-stage optimization strategies.
- **Awakened spatial intelligence**: stronger spatial understanding, controllable spatial editing, and novel-view-assisted reasoning through a bidirectional loop between understanding and generation.
- **Advanced visual generation**: strong long-text typography, layout fidelity, multi-view generation, and controllable editing with better preservation of scene structure.
## 🔍 Visual Overview
### Capability Profile
JoyAI-Image demonstrates broad multimodal performance across understanding, synthesis, and editing, with particular strengths in spatial reasoning, long-text rendering, multi-view generation, and controllable editing.
### Advanced Text Rendering Showcase
JoyAI-Image is optimized for challenging text-heavy scenarios, including multi-panel comics, dense multi-line text, multilingual typography, long-form layouts, real-world scene text, and handwritten styles.
### Multi-view Generation and Spatial Editing Showcase
JoyAI-Image showcases a spatially grounded generation and editing pipeline that supports multi-view generation, geometry-aware transformations, camera control, object rotation, and precise location-specific object editing. Across these settings, it preserves scene content, structure, and visual consistency while following viewpoint-sensitive instructions more accurately.
### Spatial Editing for Spatial Reasoning Showcase
JoyAI-Image poses high-fidelity spatial editing, serving as a powerful catalyst for enhancing spatial reasoning. Compared with Qwen-Image-Edit and Nano Banana Pro, JoyAI-Image-Edit synthesizes the most diagnostic viewpoints by faithfully executing camera motions. These high-fidelity novel views effectively disambiguate complex spatial relations, providing clearer visual evidence for downstream reasoning.
## 🚀 Quick Start
### 1. Environment Setup
**Requirements**: Python >= 3.10, CUDA-capable GPU
Create a virtual environment and install:
```bash
conda create -n joyai python=3.10 -y
conda activate joyai
pip install -e .
```
> **Note on Flash Attention**: `flash-attn` is optional and is intentionally **not** installed in Hugging Face Spaces builds by default, because pip build isolation frequently breaks its installation there. The Space will fall back to PyTorch SDPA automatically.
#### Core Dependencies
| Package | Version | Purpose |
|---------|---------|---------|
| `torch` | >= 2.8 | PyTorch |
| `transformers` | >= 4.57.0, < 4.58.0 | Text encoder |
| `diffusers` | >= 0.34.0 | Pipeline utilities |
| `flash-attn` | optional | Fast attention kernel (local install only) |
### 2. Inference
#### 2.1 Image Understanding
```bash
python inference_und.py \
--ckpt-root /path/to/ckpts_infer \
--image "test_images/test_1.jpg,test_images/test3.png" \
--prompt "Compare these two images." \
--max-new-tokens 1024
```
#### CLI Reference (`inference_und.py`)
| Argument | Type | Default | Description |
|----------|------|---------|-------------|
| `--ckpt-root` | str | *required* | Checkpoint root containing `text_encoder/` |
| `--image` | str | *required* | Input image path, or comma-separated paths for multiple images |
| `--prompt` | str | `"Describe this image in detail."` | User question or instruction. When omitted, defaults to image captioning |
| `--max-new-tokens` | int | 2048 | Maximum number of tokens to generate |
| `--temperature` | float | 0.7 | Sampling temperature. Use `0` for greedy decoding |
| `--top-p` | float | 0.8 | Top-p (nucleus) sampling threshold |
| `--top-k` | int | 50 | Top-k sampling threshold |
| `--output` | str | None | Optional output file to save the response text |
#### 2.2 Image Editing
```bash
python inference.py \
--ckpt-root /path/to/ckpts_infer \
--prompt "Turn the plate blue" \
--image test_images/test_1.jpg \
--output outputs/result.png \
--seed 123 \
--steps 30 \
--guidance-scale 5.0 \
--basesize 1024
```
#### CLI Reference (`inference.py`)
| Argument | Type | Default | Description |
|----------|------|---------|-------------|
| `--ckpt-root` | str | *required* | Checkpoint root |
| `--prompt` | str | *required* | Edit instruction or T2I prompt |
| `--image` | str | None | Input image path (required for editing, omit for T2I) |
| `--output` | str | `example.png` | Output image path |
| `--steps` | int | 50 | Denoising steps |
| `--guidance-scale` | float | 5.0 | Classifier-free guidance scale |
| `--seed` | int | 42 | Random seed for reproducibility |
| `--neg-prompt` | str | `""` | Negative prompt |
| `--basesize` | int | 1024 | Bucket base size for input image resizing (256/512/768/1024) |
| `--config` | str | auto | Config path; defaults to `/infer_config.py` |
| `--rewrite-prompt` | flag | off | Enable LLM-based prompt rewriting |
| `--rewrite-model` | str | `gpt-5` | Model name for prompt rewriting |
| `--hsdp-shard-dim` | int | 1 | FSDP shard dimension for multi-GPU (set to GPU count) |
### 3. Spatial Editing Reference
JoyAI-Image supports three spatial editing prompt patterns: **Object Move**, **Object Rotation**, and **Camera Control**. For the most stable behavior, we recommend following the prompt templates below as closely as possible.
#### 3.1 Object Move
Use this pattern when you want to move a target object into a specified region.
**Prompt template:**
```text
Move the