Create README.md

README.md

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+---
+library_name: sana
+tags:
+- text-to-image
+- Sana
+- 512px_based_image_size
+- Multi-language
+language:
+- en
+- zh
+base_model:
+- Efficient-Large-Model/Sana_1600M_512px_diffusers
+pipeline_tag: text-to-image
+---
+<p align="center" style="border-radius: 10px">
+  <img src="https://raw.githubusercontent.com/NVlabs/Sana/refs/heads/main/asset/logo.png" width="35%" alt="logo"/>
+</p>
+
+<div style="display:flex;justify-content: center">
+  <a href="https://huggingface.co/collections/Efficient-Large-Model/sana-673efba2a57ed99843f11f9e"><img src="https://img.shields.io/static/v1?label=Demo&message=Huggingface&color=yellow"></a> &ensp;
+  <a href="https://github.com/NVlabs/Sana"><img src="https://img.shields.io/static/v1?label=Code&message=Github&color=blue&logo=github"></a> &ensp;
+  <a href="https://nvlabs.github.io/Sana/"><img src="https://img.shields.io/static/v1?label=Project&message=Github&color=blue&logo=github-pages"></a> &ensp;
+  <a href="https://hanlab.mit.edu/projects/sana/"><img src="https://img.shields.io/static/v1?label=Page&message=MIT&color=darkred&logo=github-pages"></a> &ensp;
+  <a href="https://arxiv.org/abs/2410.10629"><img src="https://img.shields.io/static/v1?label=Arxiv&message=Sana&color=red&logo=arxiv"></a> &ensp;
+  <a href="https://nv-sana.mit.edu/"><img src="https://img.shields.io/static/v1?label=Demo&message=MIT&color=yellow"></a> &ensp;
+  <a href="https://discord.gg/rde6eaE5Ta"><img src="https://img.shields.io/static/v1?label=Discuss&message=Discord&color=purple&logo=discord"></a> &ensp;
+</div>
+
+# Model card
+
+We introduce **Sana**, a text-to-image framework that can efficiently generate images up to 4096 × 4096 resolution.
+Sana can synthesize high-resolution, high-quality images with strong text-image alignment at a remarkably fast speed, deployable on laptop GPU.
+
+Source code is available at https://github.com/NVlabs/Sana.
+
+# Note
+- Weakness in Complex Scene Creation: Due to limitation of data, our model has **limited** capabilities in generating complex scenes, text, and human hands.
+- **Enhancing Capabilities**: The model’s performance can be improved by **increasing the complexity and length of prompts**. Below are some examples of **prompts and samples**.
+
+### Model Description
+
+- **Developed by:** NVIDIA, Sana
+- **Model type:** Linear-Diffusion-Transformer-based text-to-image generative model
+- **Model size:** 1648M parameters
+- **Model resolution:** This model is developed to generate 512px based images with multi-scale heigh and width.
+- **License:** [NSCL v2-custom](./LICENSE.txt). Governing Terms:  NVIDIA License.  Additional Information:  [Gemma Terms of Use  |  Google AI for Developers](https://ai.google.dev/gemma/terms) for Gemma-2-2B-IT, [Gemma Prohibited Use Policy  |  Google AI for Developers](https://ai.google.dev/gemma/prohibited_use_policy).
+- **Model Description:** This is a model that can be used to generate and modify images based on text prompts. 
+It is a Linear Diffusion Transformer that uses one fixed, pretrained text encoders ([Gemma2-2B-IT](https://huggingface.co/google/gemma-2-2b-it))
+and one 32x spatial-compressed latent feature encoder ([DC-AE](https://hanlab.mit.edu/projects/dc-ae)).
+- **Resources for more information:** Check out our [GitHub Repository](https://github.com/NVlabs/Sana) and the [Sana report on arXiv](https://arxiv.org/abs/2410.10629).
+
+### Model Sources
+
+For research purposes, we recommend our `generative-models` Github repository (https://github.com/NVlabs/Sana), 
+which is more suitable for both training and inference and for which most advanced diffusion sampler like Flow-DPM-Solver is integrated.
+[MIT Han-Lab](https://nv-sana.mit.edu/) provides free Sana inference.
+- **Repository:** https://github.com/NVlabs/Sana
+
+### 🧨 Diffusers 
+
+### 1. How to use `SanaPipeline` with `🧨diffusers`
+
+> \[!IMPORTANT\]
+> Make sure to specify `pipe.transformer` to default `torch_dtype` and `variant` according to [Model Card](asset/docs/model_zoo.md).
+>
+> Set `pipe.text_encoder` to BF16 and `pipe.vae` to FP32 or BF16. For more info, [docs](https://huggingface.co/docs/diffusers/main/en/api/pipelines/sana#sanapipeline) are here.
+
+```python
+# run `pip install git+https://github.com/huggingface/diffusers` before use Sana in diffusers
+import torch
+from diffusers import SanaPipeline
+
+pipe = SanaPipeline.from_pretrained(
+    "Efficient-Large-Model/Sana_1600M_512px_diffusers",
+    variant="fp16",
+    torch_dtype=torch.float16,
+)
+pipe.to("cuda")
+
+pipe.vae.to(torch.bfloat16)
+pipe.text_encoder.to(torch.bfloat16)
+
+prompt = 'A cute 🐼 eating 🎋, ink drawing style'
+image = pipe(
+    prompt=prompt,
+    height=512,
+    width=512,
+    guidance_scale=4.5,
+    num_inference_steps=20,
+    generator=torch.Generator(device="cuda").manual_seed(42),
+)[0]
+
+image[0].save("sana.png")
+```
+
+### 2. How to use `SanaPAGPipeline` with `🧨diffusers`
+
+```python
+# run `pip install git+https://github.com/huggingface/diffusers` before use Sana in diffusers
+import torch
+from diffusers import SanaPAGPipeline
+
+pipe = SanaPAGPipeline.from_pretrained(
+  "Efficient-Large-Model/Sana_1600M_512px_diffusers",
+  variant="fp16",
+  torch_dtype=torch.float16,
+  pag_applied_layers="transformer_blocks.8",
+)
+pipe.to("cuda")
+
+pipe.text_encoder.to(torch.bfloat16)
+pipe.vae.to(torch.bfloat16)
+
+prompt = 'A cute 🐼 eating 🎋, ink drawing style'
+image = pipe(
+    prompt=prompt,
+    height=512,
+    width=512,
+    guidance_scale=5.0,
+    pag_scale=2.0,
+    num_inference_steps=20,
+    generator=torch.Generator(device="cuda").manual_seed(42),
+)[0]
+image[0].save('sana.png')
+```
+
+## Uses
+
+### Direct Use
+
+The model is intended for research purposes only. Possible research areas and tasks include
+
+- Generation of artworks and use in design and other artistic processes.
+- Applications in educational or creative tools.
+- Research on generative models.
+- Safe deployment of models which have the potential to generate harmful content.
+
+- Probing and understanding the limitations and biases of generative models.
+
+Excluded uses are described below.
+
+### Out-of-Scope Use
+
+The model was not trained to be factual or true representations of people or events, and therefore using the model to generate such content is out-of-scope for the abilities of this model.
+
+## Limitations and Bias
+
+### Limitations
+
+- The model does not achieve perfect photorealism
+- The model cannot render complex legible text
+- fingers, .etc in general may not be generated properly.
+- The autoencoding part of the model is lossy.
+
+### Bias
+While the capabilities of image generation models are impressive, they can also reinforce or exacerbate social biases.