# # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. --> # HiDreamImage [HiDream-I1](https://huggingface.co/HiDream-ai) by HiDream.ai > [!TIP] > [Caching](../../optimization/cache) may also speed up inference by storing and reusing intermediate outputs. ## Available models The following models are available for the [HiDreamImagePipeline](/docs/diffusers/main/en/api/pipelines/hidream#diffusers.HiDreamImagePipeline) pipeline: | Model name | Description | |:---|:---| | [`HiDream-ai/HiDream-I1-Full`](https://huggingface.co/HiDream-ai/HiDream-I1-Full) | - | | [`HiDream-ai/HiDream-I1-Dev`](https://huggingface.co/HiDream-ai/HiDream-I1-Dev) | - | | [`HiDream-ai/HiDream-I1-Fast`](https://huggingface.co/HiDream-ai/HiDream-I1-Fast) | - | ## HiDreamImagePipeline[[diffusers.HiDreamImagePipeline]] - **prompt** (`str` or `list[str]`, *optional*) -- The prompt or prompts to guide the image generation. If not defined, one has to pass `prompt_embeds`. instead. - **prompt_2** (`str` or `list[str]`, *optional*) -- The prompt or prompts to be sent to `tokenizer_2` and `text_encoder_2`. If not defined, `prompt` is will be used instead. - **prompt_3** (`str` or `list[str]`, *optional*) -- The prompt or prompts to be sent to `tokenizer_3` and `text_encoder_3`. If not defined, `prompt` is will be used instead. - **prompt_4** (`str` or `list[str]`, *optional*) -- The prompt or prompts to be sent to `tokenizer_4` and `text_encoder_4`. If not defined, `prompt` is will be used instead. - **height** (`int`, *optional*, defaults to self.unet.config.sample_size * self.vae_scale_factor) -- The height in pixels of the generated image. This is set to 1024 by default for the best results. - **width** (`int`, *optional*, defaults to self.unet.config.sample_size * self.vae_scale_factor) -- The width in pixels of the generated image. This is set to 1024 by default for the best results. - **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. - **sigmas** (`list[float]`, *optional*) -- Custom sigmas to use for the denoising process with schedulers which support a `sigmas` argument in their `set_timesteps` method. If not defined, the default behavior when `num_inference_steps` is passed will be used. - **guidance_scale** (`float`, *optional*, defaults to 3.5) -- Embedded guiddance scale is enabled by setting `guidance_scale` > 1. Higher `guidance_scale` encourages a model to generate images more aligned with `prompt` at the expense of lower image quality. Guidance-distilled models approximates true classifer-free guidance for `guidance_scale` > 1. Refer to the [paper](https://huggingface.co/papers/2210.03142) to learn more. - **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 `true_cfg_scale` is not greater than `1`). - **negative_prompt_2** (`str` or `list[str]`, *optional*) -- The prompt or prompts not to guide the image generation to be sent to `tokenizer_2` and `text_encoder_2`. If not defined, `negative_prompt` is used in all the text-encoders. - **negative_prompt_3** (`str` or `list[str]`, *optional*) -- The prompt or prompts not to guide the image generation to be sent to `tokenizer_3` and `text_encoder_3`. If not defined, `negative_prompt` is used in all the text-encoders. - **negative_prompt_4** (`str` or `list[str]`, *optional*) -- The prompt or prompts not to guide the image generation to be sent to `tokenizer_4` and `text_encoder_4`. If not defined, `negative_prompt` is used in all the text-encoders. - **num_images_per_prompt** (`int`, *optional*, defaults to 1) -- The number of images to generate per prompt. - **generator** (`torch.Generator` or `list[torch.Generator]`, *optional*) -- One or a list of [torch generator(s)](https://pytorch.org/docs/stable/generated/torch.Generator.html) to make generation deterministic. - **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 will be generated by sampling using the supplied random `generator`. - **prompt_embeds_t5** (`torch.FloatTensor`, *optional*) -- Pre-generated T5 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. - **prompt_embeds_llama3** (`torch.FloatTensor`, *optional*) -- Pre-generated LLaMA3 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_t5** (`torch.FloatTensor`, *optional*) -- Pre-generated negative T5 text embeddings. Can be used to easily tweak text inputs, *e.g.* prompt weighting. If not provided, embeddings will be generated from `negative_prompt` input argument. - **negative_prompt_embeds_llama3** (`torch.FloatTensor`, *optional*) -- Pre-generated negative LLaMA3 text embeddings. Can be used to easily tweak text inputs, *e.g.* prompt weighting. If not provided, embeddings will be generated from `negative_prompt` input argument. - **pooled_prompt_embeds** (`torch.FloatTensor`, *optional*) -- Pre-generated pooled text embeddings. Can be used to easily tweak text inputs, *e.g.* prompt weighting. If not provided, pooled text embeddings will be generated from `prompt` input argument. - **negative_pooled_prompt_embeds** (`torch.FloatTensor`, *optional*) -- Pre-generated negative pooled text embeddings. Can be used to easily tweak text inputs, *e.g.* prompt weighting. If not provided, pooled negative_prompt_embeds will be generated from `negative_prompt` input argument. - **output_type** (`str`, *optional*, defaults to `"pil"`) -- The output format of the generate image. Choose between [PIL](https://pillow.readthedocs.io/en/stable/): `PIL.Image.Image` or `np.array`. - **return_dict** (`bool`, *optional*, defaults to `True`) -- Whether or not to return a `~pipelines.flux.FluxPipelineOutput` instead of a plain tuple. - **attention_kwargs** (`dict`, *optional*) -- A kwargs dictionary that if specified is passed along to the `AttentionProcessor` as defined under `self.processor` in [diffusers.models.attention_processor](https://github.com/huggingface/diffusers/blob/main/src/diffusers/models/attention_processor.py). - **callback_on_step_end** (`Callable`, *optional*) -- A function that calls at the end of each denoising steps during the inference. The function is called with the following arguments: `callback_on_step_end(self: DiffusionPipeline, step: int, timestep: int, callback_kwargs: Dict)`. `callback_kwargs` will include a list of all tensors as specified by `callback_on_step_end_tensor_inputs`. - **callback_on_step_end_tensor_inputs** (`list`, *optional*) -- The list of tensor inputs for the `callback_on_step_end` function. The tensors specified in the list will be passed as `callback_kwargs` argument. You will only be able to include variables listed in the `._callback_tensor_inputs` attribute of your pipeline class. - **max_sequence_length** (`int` defaults to 128) -- Maximum sequence length to use with the `prompt`.`~pipelines.hidream_image.HiDreamImagePipelineOutput` or `tuple``~pipelines.hidream_image.HiDreamImagePipelineOutput` if `return_dict` is True, otherwise a `tuple`. When returning a tuple, the first element is a list with the generated. images. Function invoked when calling the pipeline for generation. Examples: ```py >>> import torch >>> from transformers import AutoTokenizer, LlamaForCausalLM >>> from diffusers import HiDreamImagePipeline >>> tokenizer_4 = AutoTokenizer.from_pretrained("meta-llama/Meta-Llama-3.1-8B-Instruct") >>> text_encoder_4 = LlamaForCausalLM.from_pretrained( ... "meta-llama/Meta-Llama-3.1-8B-Instruct", ... output_hidden_states=True, ... output_attentions=True, ... torch_dtype=torch.bfloat16, ... ) >>> pipe = HiDreamImagePipeline.from_pretrained( ... "HiDream-ai/HiDream-I1-Full", ... tokenizer_4=tokenizer_4, ... text_encoder_4=text_encoder_4, ... torch_dtype=torch.bfloat16, ... ) >>> pipe.enable_model_cpu_offload() >>> image = pipe( ... 'A cat holding a sign that says "Hi-Dreams.ai".', ... height=1024, ... width=1024, ... guidance_scale=5.0, ... num_inference_steps=50, ... generator=torch.Generator("cuda").manual_seed(0), ... ).images[0] >>> image.save("output.png") ``` ## HiDreamImagePipelineOutput[[diffusers.pipelines.hidream_image.pipeline_output.HiDreamImagePipelineOutput]] - **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)`. PIL images or numpy array present the denoised images of the diffusion pipeline. Output class for HiDreamImage pipelines.