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# ์ถ๋ก ์ ์ํด ONNX ๋ฐํ์์ ์ฌ์ฉํ๋ ๋ฐฉ๋ฒ
๐ค Diffusers๋ ONNX Runtime๊ณผ ํธํ๋๋ Stable Diffusion ํ์ดํ๋ผ์ธ์ ์ ๊ณตํฉ๋๋ค. ์ด๋ฅผ ํตํด ONNX(CPU ํฌํจ)๋ฅผ ์ง์ํ๊ณ PyTorch์ ๊ฐ์ ๋ฒ์ ์ ์ฌ์ฉํ ์ ์๋ ๋ชจ๋ ํ๋์จ์ด์์ Stable Diffusion์ ์คํํ ์ ์์ต๋๋ค.
## ์ค์น
๋ค์ ๋ช
๋ น์ด๋ก ONNX Runtime๋ฅผ ์ง์ํ๋ ๐ค Optimum๋ฅผ ์ค์นํฉ๋๋ค:
```
pip install optimum["onnxruntime"]
```
## Stable Diffusion ์ถ๋ก
์๋ ์ฝ๋๋ ONNX ๋ฐํ์์ ์ฌ์ฉํ๋ ๋ฐฉ๋ฒ์ ๋ณด์ฌ์ค๋๋ค. `StableDiffusionPipeline` ๋์ `OnnxStableDiffusionPipeline`์ ์ฌ์ฉํด์ผ ํฉ๋๋ค.
PyTorch ๋ชจ๋ธ์ ๋ถ๋ฌ์ค๊ณ ์ฆ์ ONNX ํ์์ผ๋ก ๋ณํํ๋ ค๋ ๊ฒฝ์ฐ `export=True`๋ก ์ค์ ํฉ๋๋ค.
```python
from optimum.onnxruntime import ORTStableDiffusionPipeline
model_id = "runwayml/stable-diffusion-v1-5"
pipe = ORTStableDiffusionPipeline.from_pretrained(model_id, export=True)
prompt = "a photo of an astronaut riding a horse on mars"
images = pipe(prompt).images[0]
pipe.save_pretrained("./onnx-stable-diffusion-v1-5")
```
ํ์ดํ๋ผ์ธ์ ONNX ํ์์ผ๋ก ์คํ๋ผ์ธ์ผ๋ก ๋ด๋ณด๋ด๊ณ ๋์ค์ ์ถ๋ก ์ ์ฌ์ฉํ๋ ค๋ ๊ฒฝ์ฐ,
[`optimum-cli export`](https://huggingface.co/docs/optimum/main/en/exporters/onnx/usage_guides/export_a_model#exporting-a-model-to-onnx-using-the-cli) ๋ช
๋ น์ด๋ฅผ ์ฌ์ฉํ ์ ์์ต๋๋ค:
```bash
optimum-cli export onnx --model runwayml/stable-diffusion-v1-5 sd_v15_onnx/
```
๊ทธ ๋ค์ ์ถ๋ก ์ ์ํํฉ๋๋ค:
```python
from optimum.onnxruntime import ORTStableDiffusionPipeline
model_id = "sd_v15_onnx"
pipe = ORTStableDiffusionPipeline.from_pretrained(model_id)
prompt = "a photo of an astronaut riding a horse on mars"
images = pipe(prompt).images[0]
```
Notice that we didn't have to specify `export=True` above.
[Optimum ๋ฌธ์](https://huggingface.co/docs/optimum/)์์ ๋ ๋ง์ ์์๋ฅผ ์ฐพ์ ์ ์์ต๋๋ค.
## ์๋ ค์ง ์ด์๋ค
- ์ฌ๋ฌ ํ๋กฌํํธ๋ฅผ ๋ฐฐ์น๋ก ์์ฑํ๋ฉด ๋๋ฌด ๋ง์ ๋ฉ๋ชจ๋ฆฌ๊ฐ ์ฌ์ฉ๋๋ ๊ฒ ๊ฐ์ต๋๋ค. ์ด๋ฅผ ์กฐ์ฌํ๋ ๋์, ๋ฐฐ์น ๋์ ๋ฐ๋ณต ๋ฐฉ๋ฒ์ด ํ์ํ ์๋ ์์ต๋๋ค.
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