#
IP-Adapter

IP-Adapter is an image prompt adapter that can be plugged into diffusion models to enable image prompting without any changes to the underlying model. Furthermore, this adapter can be reused with other models finetuned from the same base model and it can be combined with other adapters like ControlNet. The key idea behind IP-Adapter is the decoupled cross-attention mechanism which adds a separate cross-attention layer just for image features instead of using the same cross-attention layer for both text and image features. This allows the model to learn more image-specific features.

Learn how to load an IP-Adapter in the Load adapters guide, and make sure you check out the IP-Adapter Plus section which requires manually loading the image encoder.

This guide will walk you through using IP-Adapter for various tasks and use cases.

##
General tasks

Let’s take a look at how to use IP-Adapter’s image prompting capabilities with the StableDiffusionXLPipeline for tasks like text-to-image, image-to-image, and inpainting. We also encourage you to try out other pipelines such as Stable Diffusion, LCM-LoRA, ControlNet, T2I-Adapter, or AnimateDiff!

In all the following examples, you’ll see the set_ip_adapter_scale() method. This method controls the amount of text or image conditioning to apply to the model. A value of `1.0` means the model is only conditioned on the image prompt. Lowering this value encourages the model to produce more diverse images, but they may not be as aligned with the image prompt. Typically, a value of `0.5` achieves a good balance between the two prompt types and produces good results.

Text-to-image
Image-to-image
Inpainting
Video

Crafting the precise text prompt to generate the image you want can be difficult because it may not always capture what you’d like to express. Adding an image alongside the text prompt helps the model better understand what it should generate and can lead to more accurate results.

Load a Stable Diffusion XL (SDXL) model and insert an IP-Adapter into the model with the load_ip_adapter() method. Use the `subfolder` parameter to load the SDXL model weights.

    from diffusers import AutoPipelineForText2Image
    from diffusers.utils import load_image
    import torch

    pipeline = AutoPipelineForText2Image.from_pretrained("stabilityai/stable-diffusion-xl-base-1.0", torch_dtype=torch.float16).to("cuda")
    pipeline.load_ip_adapter("h94/IP-Adapter", subfolder="sdxl_models", weight_name="ip-adapter_sdxl.bin")
    pipeline.set_ip_adapter_scale(0.6)

Create a text prompt and load an image prompt before passing them to the pipeline to generate an image.

    image = load_image("https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/diffusers/ip_adapter_diner.png")
    generator = torch.Generator(device="cpu").manual_seed(0)
    images = pipeline(
        prompt="a polar bear sitting in a chair drinking a milkshake",
        ip_adapter_image=image,
        negative_prompt="deformed, ugly, wrong proportion, low res, bad anatomy, worst quality, low quality",
        num_inference_steps=100,
        generator=generator,
    ).images
    images[0]

IP-Adapter image
generated image

While calling `load_ip_adapter()`, pass `low_cpu_mem_usage=True` to speed up the loading time.

##
Specific use cases

IP-Adapter’s image prompting and compatibility with other adapters and models makes it a versatile tool for a variety of use cases. This section covers some of the more popular applications of IP-Adapter, and we can’t wait to see what you come up with!

###
Face model

Generating accurate faces is challenging because they are complex and nuanced. Diffusers supports two IP-Adapter checkpoints specifically trained to generate faces:

- ip-adapter-full-face_sd15.safetensors is conditioned with images of cropped faces and removed backgrounds
- ip-adapter-plus-face_sd15.safetensors uses patch embeddings and is conditioned with images of cropped faces

> [!TIP][IP-Adapter-FaceID](https://huggingface.co/h94/IP-Adapter-FaceID) is a face-specific IP-Adapter trained with face ID embeddings instead of CLIP image embeddings, allowing you to generate more consistent faces in different contexts and styles. Try out this popular community pipeline and see how it compares to the other face IP-Adapters.

For face models, use the h94/IP-Adapter checkpoint. It is also recommended to use DDIMScheduler or EulerDiscreteScheduler for face models.

    import torch
    from diffusers import StableDiffusionPipeline, DDIMScheduler
    from diffusers.utils import load_image

    pipeline = StableDiffusionPipeline.from_pretrained(
        "runwayml/stable-diffusion-v1-5",
        torch_dtype=torch.float16,
    ).to("cuda")
    pipeline.scheduler = DDIMScheduler.from_config(pipeline.scheduler.config)
    pipeline.load_ip_adapter("h94/IP-Adapter", subfolder="models", weight_name="ip-adapter-full-face_sd15.bin")

    pipeline.set_ip_adapter_scale(0.5)

    image = load_image("https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/diffusers/ip_adapter_einstein_base.png")
    generator = torch.Generator(device="cpu").manual_seed(26)

    image = pipeline(
        prompt="A photo of Einstein as a chef, wearing an apron, cooking in a French restaurant",
        ip_adapter_image=image,
        negative_prompt="lowres, bad anatomy, worst quality, low quality",
        num_inference_steps=100,
        generator=generator,
    ).images[0]
    image

IP-Adapter image
generated image

###
Multi IP-Adapter

More than one IP-Adapter can be used at the same time to generate specific images in more diverse styles. For example, you can use IP-Adapter-Face to generate consistent faces and characters, and IP-Adapter Plus to generate those faces in a specific style.

Read the IP-Adapter Plus section to learn why you need to manually load the image encoder.

Load the image encoder with CLIPVisionModelWithProjection.

    import torch
    from diffusers import AutoPipelineForText2Image, DDIMScheduler
    from transformers import CLIPVisionModelWithProjection
    from diffusers.utils import load_image

    image_encoder = CLIPVisionModelWithProjection.from_pretrained(
        "h94/IP-Adapter",
        subfolder="models/image_encoder",
        torch_dtype=torch.float16,
    )

Next, you’ll load a base model, scheduler, and the IP-Adapters. The IP-Adapters to use are passed as a list to the `weight_name` parameter:

- ip-adapter-plus_sdxl_vit-h uses patch embeddings and a ViT-H image encoder
- ip-adapter-plus-face_sdxl_vit-h has the same architecture but it is conditioned with images of cropped faces

    pipeline = AutoPipelineForText2Image.from_pretrained(
        "stabilityai/stable-diffusion-xl-base-1.0",
        torch_dtype=torch.float16,
        image_encoder=image_encoder,
    )
    pipeline.scheduler = DDIMScheduler.from_config(pipeline.scheduler.config)
    pipeline.load_ip_adapter(
      "h94/IP-Adapter",
      subfolder="sdxl_models",
      weight_name=["ip-adapter-plus_sdxl_vit-h.safetensors", "ip-adapter-plus-face_sdxl_vit-h.safetensors"]
    )
    pipeline.set_ip_adapter_scale([0.7, 0.3])
    pipeline.enable_model_cpu_offload()

Load an image prompt and a folder containing images of a certain style you want to use.

    face_image = load_image("https://huggingface.co/datasets/YiYiXu/testing-images/resolve/main/women_input.png")
    style_folder = "https://huggingface.co/datasets/YiYiXu/testing-images/resolve/main/style_ziggy"
    style_images =  [load_image(f"{style_folder}/img{i}.png") for i in range(10)]

IP-Adapter image of face
IP-Adapter style images

Pass the image prompt and style images as a list to the `ip_adapter_image` parameter, and run the pipeline!

    generator = torch.Generator(device="cpu").manual_seed(0)

    image = pipeline(
        prompt="wonderwoman",
        ip_adapter_image=[style_images, face_image],
        negative_prompt="monochrome, lowres, bad anatomy, worst quality, low quality",
        num_inference_steps=50, num_images_per_prompt=1,
        generator=generator,
    ).images[0]

###
Instant generation

Latent Consistency Models (LCM) are diffusion models that can generate images in as little as 4 steps compared to other diffusion models like SDXL that typically require way more steps. This is why image generation with an LCM feels “instantaneous”. IP-Adapters can be plugged into an LCM-LoRA model to instantly generate images with an image prompt.

The IP-Adapter weights need to be loaded first, then you can use load_lora_weights() to load the LoRA style and weight you want to apply to your image.

    from diffusers import DiffusionPipeline, LCMScheduler
    import torch
    from diffusers.utils import load_image

    model_id =  "sd-dreambooth-library/herge-style"
    lcm_lora_id = "latent-consistency/lcm-lora-sdv1-5"

    pipeline = DiffusionPipeline.from_pretrained(model_id, torch_dtype=torch.float16)

    pipeline.load_ip_adapter("h94/IP-Adapter", subfolder="models", weight_name="ip-adapter_sd15.bin")
    pipeline.load_lora_weights(lcm_lora_id)
    pipeline.scheduler = LCMScheduler.from_config(pipe.scheduler.config)
    pipeline.enable_model_cpu_offload()

Try using with a lower IP-Adapter scale to condition image generation more on the herge_style checkpoint, and remember to use the special token `herge_style` in your prompt to trigger and apply the style.

    pipeline.set_ip_adapter_scale(0.4)

    prompt = "herge_style woman in armor, best quality, high quality"
    generator = torch.Generator(device="cpu").manual_seed(0)

    ip_adapter_image = load_image("https://user-images.githubusercontent.com/24734142/266492875-2d50d223-8475-44f0-a7c6-08b51cb53572.png")
    image = pipeline(
        prompt=prompt,
        ip_adapter_image=ip_adapter_image,
        num_inference_steps=4,
        guidance_scale=1,
    ).images[0]
    image

###
Structural control

To control image generation to an even greater degree, you can combine IP-Adapter with a model like ControlNet. A ControlNet is also an adapter that can be inserted into a diffusion model to allow for conditioning on an additional control image. The control image can be depth maps, edge maps, pose estimations, and more.

Load a ControlNetModel checkpoint conditioned on depth maps, insert it into a diffusion model, and load the IP-Adapter.

    from diffusers import StableDiffusionControlNetPipeline, ControlNetModel
    import torch
    from diffusers.utils import load_image

    controlnet_model_path = "lllyasviel/control_v11f1p_sd15_depth"
    controlnet = ControlNetModel.from_pretrained(controlnet_model_path, torch_dtype=torch.float16)

    pipeline = StableDiffusionControlNetPipeline.from_pretrained(
        "runwayml/stable-diffusion-v1-5", controlnet=controlnet, torch_dtype=torch.float16)
    pipeline.to("cuda")
    pipeline.load_ip_adapter("h94/IP-Adapter", subfolder="models", weight_name="ip-adapter_sd15.bin")

Now load the IP-Adapter image and depth map.

    ip_adapter_image = load_image("https://huggingface.co/datasets/YiYiXu/testing-images/resolve/main/statue.png")
    depth_map = load_image("https://huggingface.co/datasets/YiYiXu/testing-images/resolve/main/depth.png")

IP-Adapter image
depth map

Pass the depth map and IP-Adapter image to the pipeline to generate an image.

    generator = torch.Generator(device="cpu").manual_seed(33)
    image = pipeline(
        prompt="best quality, high quality",
        image=depth_map,
        ip_adapter_image=ip_adapter_image,
        negative_prompt="monochrome, lowres, bad anatomy, worst quality, low quality",
        num_inference_steps=50,
        generator=generator,
    ).image[0]
    image

###
IP-Adapter masking

Binary masks can be used to specify which portion of the output image should be assigned to an IP-Adapter. For each input IP-Adapter image, a binary mask and an IP-Adapter must be provided.

Before passing the masks to the pipeline, it’s essential to preprocess them using `IPAdapterMaskProcessor.preprocess()`.

For optimal results, provide the output height and width to `IPAdapterMaskProcessor.preprocess()`. This ensures that masks with differing aspect ratios are appropriately stretched. If the input masks already match the aspect ratio of the generated image, specifying height and width can be omitted.

Here an example with two masks:

    from diffusers.image_processor import IPAdapterMaskProcessor

    mask1 = load_image("https://huggingface.co/datasets/YiYiXu/testing-images/resolve/main/ip_mask_mask1.png")
    mask2 = load_image("https://huggingface.co/datasets/YiYiXu/testing-images/resolve/main/ip_mask_mask2.png")

    output_height = 1024
    output_width = 1024

    processor = IPAdapterMaskProcessor()
    masks = processor.preprocess([mask1, mask2], height=output_height, width=output_width)

mask one
mask two

If you have more than one IP-Adapter image, load them into a list, ensuring each image is assigned to a different IP-Adapter.

    face_image1 = load_image("https://huggingface.co/datasets/YiYiXu/testing-images/resolve/main/ip_mask_girl1.png")
    face_image2 = load_image("https://huggingface.co/datasets/YiYiXu/testing-images/resolve/main/ip_mask_girl2.png")

    ip_images =[[image1], [image2]]

ip adapter image one
ip adapter image two

Pass preprocessed masks to the pipeline using `cross_attention_kwargs` as shown below:

    pipeline.load_ip_adapter("h94/IP-Adapter", subfolder="sdxl_models", weight_name=["ip-adapter-plus-face_sdxl_vit-h.safetensors"] * 2)
    pipeline.set_ip_adapter_scale([0.7] * 2)
    generator = torch.Generator(device="cpu").manual_seed(0)
    num_images=1

    image = pipeline(
        prompt="2 girls",
        ip_adapter_image=ip_images,
        negative_prompt="monochrome, lowres, bad anatomy, worst quality, low quality",
        num_inference_steps=20, num_images_per_prompt=num_images,
        generator=generator, cross_attention_kwargs={"ip_adapter_masks": masks}
    ).images[0]

output image