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# Unconditional image generation
[[open-in-colab]]
Unconditional image generation is a relatively straightforward task. The model only generates images - without any additional context like text or an image - resembling the training data it was trained on.
The [`DiffusionPipeline`] is the easiest way to use a pre-trained diffusion system for inference.
Start by creating an instance of [`DiffusionPipeline`] and specify which pipeline checkpoint you would like to download.
You can use any of the 🧨 Diffusers [checkpoints](https://huggingface.co/models?library=diffusers&sort=downloads) from the Hub (the checkpoint you'll use generates images of butterflies).
<Tip>
💡 Want to train your own unconditional image generation model? Take a look at the training [guide](training/unconditional_training) to learn how to generate your own images.
</Tip>
In this guide, you'll use [`DiffusionPipeline`] for unconditional image generation with [DDPM](https://arxiv.org/abs/2006.11239):
```python
>>> from diffusers import DiffusionPipeline
>>> generator = DiffusionPipeline.from_pretrained("anton-l/ddpm-butterflies-128")
```
The [`DiffusionPipeline`] downloads and caches all modeling, tokenization, and scheduling components.
Because the model consists of roughly 1.4 billion parameters, we strongly recommend running it on a GPU.
You can move the generator object to a GPU, just like you would in PyTorch:
```python
>>> generator.to("cuda")
```
Now you can use the `generator` to generate an image:
```python
>>> image = generator().images[0]
```
The output is by default wrapped into a [`PIL.Image`](https://pillow.readthedocs.io/en/stable/reference/Image.html?highlight=image#the-image-class) object.
You can save the image by calling:
```python
>>> image.save("generated_image.png")
```
Try out the Spaces below, and feel free to play around with the inference steps parameter to see how it affects the image quality!
<iframe
src="https://stevhliu-ddpm-butterflies-128.hf.space"
frameborder="0"
width="850"
height="500"
></iframe>
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