GLIGEN (Grounded Language-to-Image Generation)

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GLIGEN (Grounded Language-to-Image Generation)

The GLIGEN model was created by researchers and engineers from . The and can generate photorealistic images conditioned on grounding inputs. Along with text and bounding boxes with , if input images are given, can insert objects described by text at the region defined by bounding boxes. Otherwise, it’ll generate an image described by the caption/prompt and insert objects described by text at the region defined by bounding boxes. It’s trained on COCO2014D and COCO2014CD datasets, and the model uses a frozen CLIP ViT-L/14 text encoder to condition itself on grounding inputs.

The abstract from the is:

Large-scale text-to-image diffusion models have made amazing advances. However, the status quo is to use text input alone, which can impede controllability. In this work, we propose GLIGEN, Grounded-Language-to-Image Generation, a novel approach that builds upon and extends the functionality of existing pre-trained text-to-image diffusion models by enabling them to also be conditioned on grounding inputs. To preserve the vast concept knowledge of the pre-trained model, we freeze all of its weights and inject the grounding information into new trainable layers via a gated mechanism. Our model achieves open-world grounded text2img generation with caption and bounding box condition inputs, and the grounding ability generalizes well to novel spatial configurations and concepts. GLIGEN’s zeroshot performance on COCO and LVIS outperforms existing supervised layout-to-image baselines by a large margin.

Make sure to check out the Stable Diffusion section to learn how to explore the tradeoff between scheduler speed and quality and how to reuse pipeline components efficiently!

If you want to use one of the official checkpoints for a task, explore the Hub organizations!

was contributed by and was contributed by .

StableDiffusionGLIGENPipeline

class diffusers.StableDiffusionGLIGENPipeline

( vae: AutoencoderKLtext_encoder: CLIPTextModeltokenizer: CLIPTokenizerunet: UNet2DConditionModelscheduler: KarrasDiffusionSchedulerssafety_checker: StableDiffusionSafetyCheckerfeature_extractor: CLIPFeatureExtractorrequires_safety_checker: bool = True )

Parameters

vae () — Variational Auto-Encoder (VAE) model to encode and decode images to and from latent representations.
text_encoder (CLIPTextModel) — Frozen text-encoder ().
tokenizer (CLIPTokenizer) — A CLIPTokenizer to tokenize text.
unet () — A UNet2DConditionModel to denoise the encoded image latents.
scheduler () — A scheduler to be used in combination with unet to denoise the encoded image latents. Can be one of , , or .
safety_checker (StableDiffusionSafetyChecker) — Classification module that estimates whether generated images could be considered offensive or harmful. Please refer to the for more details about a model’s potential harms.
feature_extractor (CLIPImageProcessor) — A CLIPImageProcessor to extract features from generated images; used as inputs to the safety_checker.

Pipeline for text-to-image generation using Stable Diffusion with Grounded-Language-to-Image Generation (GLIGEN).

__call__

Parameters

prompt (str or List[str], optional) — The prompt or prompts to guide image generation. If not defined, you need to pass prompt_embeds.
height (int, optional, defaults to self.unet.config.sample_size * self.vae_scale_factor) — The height in pixels of the generated image.
width (int, optional, defaults to self.unet.config.sample_size * self.vae_scale_factor) — The width in pixels of the generated image.
num_inference_steps (int, optional, defaults to 50) — The number of denoising steps. More denoising steps usually lead to a higher quality image at the expense of slower inference.
guidance_scale (float, optional, defaults to 7.5) — A higher guidance scale value encourages the model to generate images closely linked to the text prompt at the expense of lower image quality. Guidance scale is enabled when guidance_scale > 1.
gligen_phrases (List[str]) — The phrases to guide what to include in each of the regions defined by the corresponding gligen_boxes. There should only be one phrase per bounding box.
gligen_boxes (List[List[float]]) — The bounding boxes that identify rectangular regions of the image that are going to be filled with the content described by the corresponding gligen_phrases. Each rectangular box is defined as a List[float] of 4 elements [xmin, ymin, xmax, ymax] where each value is between [0,1].
gligen_inpaint_image (PIL.Image.Image, optional) — The input image, if provided, is inpainted with objects described by the gligen_boxes and gligen_phrases. Otherwise, it is treated as a generation task on a blank input image.
negative_prompt (str or List[str], optional) — The prompt or prompts to guide what to not include in image generation. If not defined, you need to pass negative_prompt_embeds instead. Ignored when not using guidance (guidance_scale < 1).
num_images_per_prompt (int, optional, defaults to 1) — The number of images to generate per prompt.
latents (torch.FloatTensor, optional) — Pre-generated noisy latents sampled from a Gaussian distribution, to be used as inputs for image generation. Can be used to tweak the same generation with different prompts. If not provided, a latents tensor is generated by sampling using the supplied random generator.
prompt_embeds (torch.FloatTensor, optional) — Pre-generated text embeddings. Can be used to easily tweak text inputs (prompt weighting). If not provided, text embeddings are generated from the prompt input argument.
negative_prompt_embeds (torch.FloatTensor, optional) — Pre-generated negative text embeddings. Can be used to easily tweak text inputs (prompt weighting). If not provided, negative_prompt_embeds are generated from the negative_prompt input argument.
output_type (str, optional, defaults to "pil") — The output format of the generated image. Choose between PIL.Image or np.array.
callback (Callable, optional) — A function that calls every callback_steps steps during inference. The function is called with the following arguments: callback(step: int, timestep: int, latents: torch.FloatTensor).
callback_steps (int, optional, defaults to 1) — The frequency at which the callback function is called. If not specified, the callback is called at every step.

Returns

The call function to the pipeline for generation.

Examples:

Copied

>>> import torch
>>> from diffusers import StableDiffusionGLIGENPipeline
>>> from diffusers.utils import load_image

>>> # Insert objects described by text at the region defined by bounding boxes
>>> pipe = StableDiffusionGLIGENPipeline.from_pretrained(
...     "masterful/gligen-1-4-inpainting-text-box", variant="fp16", torch_dtype=torch.float16
... )
>>> pipe = pipe.to("cuda")

>>> input_image = load_image(
...     "https://hf.co/datasets/boincai/documentation-images/resolve/main/diffusers/gligen/livingroom_modern.png"
... )
>>> prompt = "a birthday cake"
>>> boxes = [[0.2676, 0.6088, 0.4773, 0.7183]]
>>> phrases = ["a birthday cake"]

>>> images = pipe(
...     prompt=prompt,
...     gligen_phrases=phrases,
...     gligen_inpaint_image=input_image,
...     gligen_boxes=boxes,
...     gligen_scheduled_sampling_beta=1,
...     output_type="pil",
...     num_inference_steps=50,
... ).images

>>> images[0].save("./gligen-1-4-inpainting-text-box.jpg")

>>> # Generate an image described by the prompt and
>>> # insert objects described by text at the region defined by bounding boxes
>>> pipe = StableDiffusionGLIGENPipeline.from_pretrained(
...     "masterful/gligen-1-4-generation-text-box", variant="fp16", torch_dtype=torch.float16
... )
>>> pipe = pipe.to("cuda")

>>> prompt = "a waterfall and a modern high speed train running through the tunnel in a beautiful forest with fall foliage"
>>> boxes = [[0.1387, 0.2051, 0.4277, 0.7090], [0.4980, 0.4355, 0.8516, 0.7266]]
>>> phrases = ["a waterfall", "a modern high speed train running through the tunnel"]

>>> images = pipe(
...     prompt=prompt,
...     gligen_phrases=phrases,
...     gligen_boxes=boxes,
...     gligen_scheduled_sampling_beta=1,
...     output_type="pil",
...     num_inference_steps=50,
... ).images

>>> images[0].save("./gligen-1-4-generation-text-box.jpg")

enable_vae_slicing

( )

Enable sliced VAE decoding. When this option is enabled, the VAE will split the input tensor in slices to compute decoding in several steps. This is useful to save some memory and allow larger batch sizes.

disable_vae_slicing

( )

Disable sliced VAE decoding. If enable_vae_slicing was previously enabled, this method will go back to computing decoding in one step.

enable_vae_tiling

( )

Enable tiled VAE decoding. When this option is enabled, the VAE will split the input tensor into tiles to compute decoding and encoding in several steps. This is useful for saving a large amount of memory and to allow processing larger images.

disable_vae_tiling

( )

Disable tiled VAE decoding. If enable_vae_tiling was previously enabled, this method will go back to computing decoding in one step.

enable_model_cpu_offload

( gpu_id: int = 0device: typing.Union[torch.device, str] = 'cuda' )

Offloads all models to CPU using accelerate, reducing memory usage with a low impact on performance. Compared to enable_sequential_cpu_offload, this method moves one whole model at a time to the GPU when its forward method is called, and the model remains in GPU until the next model runs. Memory savings are lower than with enable_sequential_cpu_offload, but performance is much better due to the iterative execution of the unet.

prepare_latents

( batch_sizenum_channels_latentsheightwidthdtypedevicegeneratorlatents = None )

enable_fuser

( enabled = True )

encode_prompt

( promptdevicenum_images_per_promptdo_classifier_free_guidancenegative_prompt = Noneprompt_embeds: typing.Optional[torch.FloatTensor] = Nonenegative_prompt_embeds: typing.Optional[torch.FloatTensor] = Nonelora_scale: typing.Optional[float] = None )

Parameters

prompt (str or List[str], optional) — prompt to be encoded device — (torch.device): torch device
num_images_per_prompt (int) — number of images that should be generated per prompt
do_classifier_free_guidance (bool) — whether to use classifier free guidance or not
negative_prompt (str or List[str], optional) — The prompt or prompts not to guide the image generation. If not defined, one has to pass negative_prompt_embeds instead. Ignored when not using guidance (i.e., ignored if guidance_scale is less than 1).
prompt_embeds (torch.FloatTensor, optional) — Pre-generated text embeddings. Can be used to easily tweak text inputs, e.g. prompt weighting. If not provided, text embeddings will be generated from prompt input argument.
negative_prompt_embeds (torch.FloatTensor, optional) — Pre-generated negative text embeddings. Can be used to easily tweak text inputs, e.g. prompt weighting. If not provided, negative_prompt_embeds will be generated from negative_prompt input argument.
lora_scale (float, optional) — A lora scale that will be applied to all LoRA layers of the text encoder if LoRA layers are loaded.

Encodes the prompt into text encoder hidden states.

StableDiffusionGLIGENTextImagePipeline

class diffusers.StableDiffusionGLIGENTextImagePipeline

( vae: AutoencoderKLtext_encoder: CLIPTextModeltokenizer: CLIPTokenizerprocessor: CLIPProcessorimage_encoder: CLIPVisionModelWithProjectionimage_project: CLIPImageProjectionunet: UNet2DConditionModelscheduler: KarrasDiffusionSchedulerssafety_checker: StableDiffusionSafetyCheckerfeature_extractor: CLIPFeatureExtractorrequires_safety_checker: bool = True )

Parameters

tokenizer (CLIPTokenizer) — A CLIPTokenizer to tokenize text.
processor (CLIPProcessor) — A CLIPProcessor to procces reference image.
image_project (CLIPImageProjection) — A CLIPImageProjection to project image embedding into phrases embedding space.
feature_extractor (CLIPImageProcessor) — A CLIPImageProcessor to extract features from generated images; used as inputs to the safety_checker.

Pipeline for text-to-image generation using Stable Diffusion with Grounded-Language-to-Image Generation (GLIGEN).

__call__

Parameters

prompt (str or List[str], optional) — The prompt or prompts to guide image generation. If not defined, you need to pass prompt_embeds.
height (int, optional, defaults to self.unet.config.sample_size * self.vae_scale_factor) — The height in pixels of the generated image.
width (int, optional, defaults to self.unet.config.sample_size * self.vae_scale_factor) — The width in pixels of the generated image.
num_inference_steps (int, optional, defaults to 50) — The number of denoising steps. More denoising steps usually lead to a higher quality image at the expense of slower inference.
guidance_scale (float, optional, defaults to 7.5) — A higher guidance scale value encourages the model to generate images closely linked to the text prompt at the expense of lower image quality. Guidance scale is enabled when guidance_scale > 1.
gligen_phrases (List[str]) — The phrases to guide what to include in each of the regions defined by the corresponding gligen_boxes. There should only be one phrase per bounding box.
gligen_images (List[PIL.Image.Image]) — The images to guide what to include in each of the regions defined by the corresponding gligen_boxes. There should only be one image per bounding box
input_phrases_mask (int or List[int]) — pre phrases mask input defined by the correspongding input_phrases_mask
input_images_mask (int or List[int]) — pre images mask input defined by the correspongding input_images_mask
gligen_boxes (List[List[float]]) — The bounding boxes that identify rectangular regions of the image that are going to be filled with the content described by the corresponding gligen_phrases. Each rectangular box is defined as a List[float] of 4 elements [xmin, ymin, xmax, ymax] where each value is between [0,1].
gligen_inpaint_image (PIL.Image.Image, optional) — The input image, if provided, is inpainted with objects described by the gligen_boxes and gligen_phrases. Otherwise, it is treated as a generation task on a blank input image.
negative_prompt (str or List[str], optional) — The prompt or prompts to guide what to not include in image generation. If not defined, you need to pass negative_prompt_embeds instead. Ignored when not using guidance (guidance_scale < 1).
num_images_per_prompt (int, optional, defaults to 1) — The number of images to generate per prompt.
latents (torch.FloatTensor, optional) — Pre-generated noisy latents sampled from a Gaussian distribution, to be used as inputs for image generation. Can be used to tweak the same generation with different prompts. If not provided, a latents tensor is generated by sampling using the supplied random generator.
prompt_embeds (torch.FloatTensor, optional) — Pre-generated text embeddings. Can be used to easily tweak text inputs (prompt weighting). If not provided, text embeddings are generated from the prompt input argument.
negative_prompt_embeds (torch.FloatTensor, optional) — Pre-generated negative text embeddings. Can be used to easily tweak text inputs (prompt weighting). If not provided, negative_prompt_embeds are generated from the negative_prompt input argument.
output_type (str, optional, defaults to "pil") — The output format of the generated image. Choose between PIL.Image or np.array.
callback (Callable, optional) — A function that calls every callback_steps steps during inference. The function is called with the following arguments: callback(step: int, timestep: int, latents: torch.FloatTensor).
callback_steps (int, optional, defaults to 1) — The frequency at which the callback function is called. If not specified, the callback is called at every step.
gligen_normalize_constant (float, optional, defaults to 28.7) — The normalize value of the image embedding.

Returns

The call function to the pipeline for generation.

Examples:

Copied

>>> import torch
>>> from diffusers import StableDiffusionGLIGENTextImagePipeline
>>> from diffusers.utils import load_image

>>> # Insert objects described by image at the region defined by bounding boxes
>>> pipe = StableDiffusionGLIGENTextImagePipeline.from_pretrained(
...     "anhnct/Gligen_Inpainting_Text_Image", torch_dtype=torch.float16
... )
>>> pipe = pipe.to("cuda")

>>> input_image = load_image(
...     "https://hf.co/datasets/boincai/documentation-images/resolve/main/diffusers/gligen/livingroom_modern.png"
... )
>>> prompt = "a backpack"
>>> boxes = [[0.2676, 0.4088, 0.4773, 0.7183]]
>>> phrases = None
>>> gligen_image = load_image(
...     "https://boincai.com/datasets/boincai/documentation-images/resolve/main/diffusers/gligen/backpack.jpeg"
... )

>>> images = pipe(
...     prompt=prompt,
...     gligen_phrases=phrases,
...     gligen_inpaint_image=input_image,
...     gligen_boxes=boxes,
...     gligen_images=[gligen_image],
...     gligen_scheduled_sampling_beta=1,
...     output_type="pil",
...     num_inference_steps=50,
... ).images

>>> images[0].save("./gligen-inpainting-text-image-box.jpg")

>>> # Generate an image described by the prompt and
>>> # insert objects described by text and image at the region defined by bounding boxes
>>> pipe = StableDiffusionGLIGENTextImagePipeline.from_pretrained(
...     "anhnct/Gligen_Text_Image", torch_dtype=torch.float16
... )
>>> pipe = pipe.to("cuda")

>>> prompt = "a flower sitting on the beach"
>>> boxes = [[0.0, 0.09, 0.53, 0.76]]
>>> phrases = ["flower"]
>>> gligen_image = load_image(
...     "https://boincai.com/datasets/boincai/documentation-images/resolve/main/diffusers/gligen/pexels-pixabay-60597.jpg"
... )

>>> images = pipe(
...     prompt=prompt,
...     gligen_phrases=phrases,
...     gligen_images=[gligen_image],
...     gligen_boxes=boxes,
...     gligen_scheduled_sampling_beta=1,
...     output_type="pil",
...     num_inference_steps=50,
... ).images

>>> images[0].save("./gligen-generation-text-image-box.jpg")

>>> # Generate an image described by the prompt and
>>> # transfer style described by image at the region defined by bounding boxes
>>> pipe = StableDiffusionGLIGENTextImagePipeline.from_pretrained(
...     "anhnct/Gligen_Text_Image", torch_dtype=torch.float16
... )
>>> pipe = pipe.to("cuda")

>>> prompt = "a dragon flying on the sky"
>>> boxes = [[0.4, 0.2, 1.0, 0.8], [0.0, 1.0, 0.0, 1.0]]  # Set `[0.0, 1.0, 0.0, 1.0]` for the style

>>> gligen_image = load_image(
...     "https://boincai.com/datasets/boincai/documentation-images/resolve/main/diffusers/landscape.png"
... )

>>> gligen_placeholder = load_image(
...     "https://boincai.com/datasets/boincai/documentation-images/resolve/main/diffusers/landscape.png"
... )

>>> images = pipe(
...     prompt=prompt,
...     gligen_phrases=[
...         "dragon",
...         "placeholder",
...     ],  # Can use any text instead of `placeholder` token, because we will use mask here
...     gligen_images=[
...         gligen_placeholder,
...         gligen_image,
...     ],  # Can use any image in gligen_placeholder, because we will use mask here
...     input_phrases_mask=[1, 0],  # Set 0 for the placeholder token
...     input_images_mask=[0, 1],  # Set 0 for the placeholder image
...     gligen_boxes=boxes,
...     gligen_scheduled_sampling_beta=1,
...     output_type="pil",
...     num_inference_steps=50,
... ).images

>>> images[0].save("./gligen-generation-text-image-box-style-transfer.jpg")

enable_vae_slicing

( )

disable_vae_slicing

( )

Disable sliced VAE decoding. If enable_vae_slicing was previously enabled, this method will go back to computing decoding in one step.

enable_vae_tiling

( )

disable_vae_tiling

( )

Disable tiled VAE decoding. If enable_vae_tiling was previously enabled, this method will go back to computing decoding in one step.

enable_model_cpu_offload

( gpu_id: int = 0device: typing.Union[torch.device, str] = 'cuda' )

prepare_latents

( batch_sizenum_channels_latentsheightwidthdtypedevicegeneratorlatents = None )

enable_fuser

( enabled = True )

complete_mask

( has_maskmax_objsdevice )

Based on the input mask corresponding value 0 or 1 for each phrases and image, mask the features corresponding to phrases and images.

crop

( imnew_widthnew_height )

Crop the input image to the specified dimensions.

draw_inpaint_mask_from_boxes

( boxessize )

Create an inpainting mask based on given boxes. This function generates an inpainting mask using the provided boxes to mark regions that need to be inpainted.

encode_prompt

Parameters

prompt (str or List[str], optional) — prompt to be encoded device — (torch.device): torch device
num_images_per_prompt (int) — number of images that should be generated per prompt
do_classifier_free_guidance (bool) — whether to use classifier free guidance or not
negative_prompt (str or List[str], optional) — The prompt or prompts not to guide the image generation. If not defined, one has to pass negative_prompt_embeds instead. Ignored when not using guidance (i.e., ignored if guidance_scale is less than 1).
prompt_embeds (torch.FloatTensor, optional) — Pre-generated text embeddings. Can be used to easily tweak text inputs, e.g. prompt weighting. If not provided, text embeddings will be generated from prompt input argument.
negative_prompt_embeds (torch.FloatTensor, optional) — Pre-generated negative text embeddings. Can be used to easily tweak text inputs, e.g. prompt weighting. If not provided, negative_prompt_embeds will be generated from negative_prompt input argument.
lora_scale (float, optional) — A lora scale that will be applied to all LoRA layers of the text encoder if LoRA layers are loaded.

Encodes the prompt into text encoder hidden states.

get_clip_feature

( inputnormalize_constantdeviceis_image = False )

Get image and phrases embedding by using CLIP pretrain model. The image embedding is transformed into the phrases embedding space through a projection.

get_cross_attention_kwargs_with_grounded

( hidden_sizegligen_phrasesgligen_imagesgligen_boxesinput_phrases_maskinput_images_maskrepeat_batchnormalize_constantmax_objsdevice )

Prepare the cross-attention kwargs containing information about the grounded input (boxes, mask, image embedding, phrases embedding).

get_cross_attention_kwargs_without_grounded

( hidden_sizerepeat_batchmax_objsdevice )

Prepare the cross-attention kwargs without information about the grounded input (boxes, mask, image embedding, phrases embedding) (All are zero tensor).

target_size_center_crop

( imnew_hw )

Crop and resize the image to the target size while keeping the center.

StableDiffusionPipelineOutput

class diffusers.pipelines.stable_diffusion.StableDiffusionPipelineOutput

( images: typing.Union[typing.List[PIL.Image.Image], numpy.ndarray]nsfw_content_detected: typing.Optional[typing.List[bool]] )

Parameters

images (List[PIL.Image.Image] or np.ndarray) — List of denoised PIL images of length batch_size or NumPy array of shape (batch_size, height, width, num_channels).
nsfw_content_detected (List[bool]) — List indicating whether the corresponding generated image contains “not-safe-for-work” (nsfw) content or None if safety checking could not be performed.

Output class for Stable Diffusion pipelines.

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Last updated 1 year ago