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| """ | |
| This baseline just returns heatmaps as the raw cross attentions. | |
| """ | |
| from concept_attention.flux.src.flux.sampling import prepare, unpack | |
| import torch | |
| import einops | |
| import PIL | |
| from concept_attention.image_generator import FluxGenerator | |
| from concept_attention.segmentation import SegmentationAbstractClass, add_noise_to_image, encode_image | |
| from concept_attention.utils import embed_concepts, linear_normalization | |
| class RawCrossAttentionBaseline(): | |
| """ | |
| This class implements the cross attention baseline. | |
| """ | |
| def __init__( | |
| self, | |
| model_name: str = "flux-schnell", | |
| device: str = "cuda", | |
| offload: bool = True, | |
| generator: FluxGenerator = None | |
| ): | |
| """ | |
| Initialize the DAAM model. | |
| """ | |
| super(RawCrossAttentionBaseline, self).__init__() | |
| if generator is None: | |
| # Load up the flux generator | |
| self.generator = FluxGenerator( | |
| model_name=model_name, | |
| device=device, | |
| offload=offload, | |
| ) | |
| else: | |
| self.generator = generator | |
| # Unpack the tokenizer | |
| self.tokenizer = self.generator.t5.tokenizer | |
| def __call__( | |
| self, | |
| prompt, | |
| concepts, | |
| seed=4, | |
| num_steps=4, | |
| timesteps=None, | |
| layers=None, | |
| softmax=False | |
| ): | |
| """ | |
| Generate cross attention heatmap visualizations. | |
| Args: | |
| - prompt: str, the prompt to generate the visualizations for | |
| - seed: int, the seed to use for the visualization | |
| Returns: | |
| - attention_maps: torch.Tensor, the attention maps for the prompt | |
| - tokens: list[str], the tokens in the prompt | |
| - image: torch.Tensor, the image generated by the | |
| """ | |
| if timesteps is None: | |
| timesteps = list(range(num_steps)) | |
| if layers is None: | |
| layers = list(range(19)) | |
| # Run the image generator | |
| image, cross_attention_maps, _ = self.generator.generate_image( | |
| width=1024, | |
| height=1024, | |
| num_steps=num_steps, | |
| guidance=0.0, | |
| seed=seed, | |
| prompt=prompt, | |
| concepts=concepts | |
| ) | |
| # Do softmax | |
| if softmax: | |
| cross_attention_maps = torch.nn.functional.softmax(cross_attention_maps, dim=-2) | |
| # Pull out the desired timesteps | |
| cross_attention_maps = cross_attention_maps[:, timesteps] | |
| # Pull out the desired layers | |
| cross_attention_maps = cross_attention_maps[layers] | |
| # AVerage over the layers, time heads | |
| cross_attention_maps = einops.reduce( | |
| cross_attention_maps, | |
| "layers time heads concepts patches -> concepts patches", | |
| reduction="mean" | |
| ) | |
| # Rearrange | |
| cross_attention_maps = einops.rearrange( | |
| cross_attention_maps, | |
| "concepts (h w) -> concepts h w", | |
| h=64, | |
| w=64 | |
| ) | |
| # Softmax | |
| if softmax: | |
| cross_attention_maps = torch.nn.functional.softmax(cross_attention_maps, dim=0) | |
| return cross_attention_maps, image | |
| class RawCrossAttentionSegmentationModel(SegmentationAbstractClass): | |
| def __init__( | |
| self, | |
| generator=None, | |
| model_name: str = "flux-schnell", | |
| device: str = "cuda", | |
| offload: bool = True, | |
| ): | |
| """ | |
| Initialize the segmentation model. | |
| """ | |
| super(RawCrossAttentionSegmentationModel, self).__init__() | |
| if generator is not None: | |
| self.generator = generator | |
| else: | |
| # Load up the flux generator | |
| self.generator = FluxGenerator( | |
| model_name=model_name, | |
| device=device, | |
| offload=offload, | |
| ) | |
| self.is_schnell = "schnell" in model_name | |
| def segment_individual_image( | |
| self, | |
| image: PIL.Image.Image, | |
| concepts: list[str], | |
| caption: str, | |
| device: str = "cuda", | |
| offload: bool = False, | |
| num_samples: int = 1, | |
| num_steps: int = 4, | |
| noise_timestep: int = 2, | |
| seed: int = 4, | |
| width: int = 1024, | |
| height: int = 1024, | |
| stop_after_multimodal_attentions: bool = True, | |
| layers: list[int] = list(range(19)), | |
| timesteps = [-1], | |
| softmax=False, | |
| normalize_concepts=False, | |
| joint_attention_kwargs=None, | |
| **kwargs | |
| ): | |
| """ | |
| Takes a real image and generates segmentation map. | |
| """ | |
| # Encode the image into the VAE latent space | |
| encoded_image_without_noise = encode_image( | |
| image, | |
| self.generator.ae, | |
| offload=offload, | |
| device=device, | |
| ) | |
| # Do N trials | |
| for i in range(num_samples): | |
| # Add noise to image | |
| encoded_image, timesteps = add_noise_to_image( | |
| encoded_image_without_noise, | |
| num_steps=num_steps, | |
| noise_timestep=noise_timestep, | |
| seed=seed + i, | |
| width=width, | |
| height=height, | |
| device=device, | |
| is_schnell=self.is_schnell, | |
| ) | |
| # Now run the diffusion model once on the noisy image | |
| if offload: | |
| self.generator.t5, self.generator.clip = self.generator.t5.to(device), self.generator.clip.to(device) | |
| inp = prepare(t5=self.generator.t5, clip=self.generator.clip, img=encoded_image, prompt=caption) | |
| concept_embeddings, concept_ids, concept_vec = embed_concepts( | |
| self.generator.clip, | |
| self.generator.t5, | |
| concepts, | |
| ) | |
| inp["concepts"] = concept_embeddings.to(encoded_image.device) | |
| inp["concept_ids"] = concept_ids.to(encoded_image.device) | |
| inp["concept_vec"] = concept_vec.to(encoded_image.device) | |
| # offload TEs to CPU, load model to gpu | |
| if offload: | |
| self.generator.t5, self.generator.clip = self.generator.t5.cpu(), self.generator.clip.cpu() | |
| torch.cuda.empty_cache() | |
| self.generator.model = self.generator.model.to(device) | |
| # Denoise the intermediate images | |
| guidance_vec = torch.full((encoded_image.shape[0],), 0.0, device=encoded_image.device, dtype=encoded_image.dtype) | |
| t_curr = timesteps[0] | |
| t_prev = timesteps[1] | |
| t_vec = torch.full((encoded_image.shape[0],), t_curr, dtype=encoded_image.dtype, device=encoded_image.device) | |
| pred, concept_cross_attentions, _ = self.generator.model( | |
| img=inp["img"], | |
| img_ids=inp["img_ids"], | |
| txt=inp["txt"], | |
| txt_ids=inp["txt_ids"], | |
| concepts=inp["concepts"], | |
| concept_ids=inp["concept_ids"], | |
| concept_vec=inp["concept_vec"], | |
| y=inp["concept_vec"], | |
| timesteps=t_vec, | |
| guidance=guidance_vec, | |
| stop_after_multimodal_attentions=stop_after_multimodal_attentions, | |
| joint_attention_kwargs=joint_attention_kwargs | |
| ) | |
| if not stop_after_multimodal_attentions: | |
| img = inp["img"] + (t_prev - t_curr) * pred | |
| # decode latents to pixel space | |
| img = unpack(img.float(), height, width) | |
| with torch.autocast(device_type=self.generator.device.type, dtype=torch.bfloat16): | |
| img = self.generator.ae.decode(img) | |
| if self.generator.offload: | |
| self.generator.ae.decoder.cpu() | |
| torch.cuda.empty_cache() | |
| img = img.clamp(-1, 1) | |
| img = einops.rearrange(img[0], "c h w -> h w c") | |
| # reconstructed_image = PIL.Image.fromarray(img.cpu().byte().numpy()) | |
| reconstructed_image = PIL.Image.fromarray((127.5 * (img + 1.0)).cpu().byte().numpy()) | |
| else: | |
| img = None | |
| reconstructed_image = None | |
| # Decode the image | |
| if offload: | |
| self.generator.model.cpu() | |
| torch.cuda.empty_cache() | |
| self.generator.ae.decoder.to(device) | |
| # Stack layers | |
| concept_cross_attentions = concept_cross_attentions.to(torch.float32) | |
| # Apply linear normalization to concepts | |
| if normalize_concepts: | |
| concept_vectors = linear_normalization(concept_vectors, dim=-2) | |
| # Apply softmax | |
| if softmax: | |
| concept_cross_attentions = torch.nn.functional.softmax(concept_cross_attentions, dim=-2) | |
| # Pull out the layer index | |
| concept_cross_attentions = concept_cross_attentions[layers] | |
| # Pull out the desired timesteps | |
| concept_cross_attentions = concept_cross_attentions[:, timesteps] | |
| # Average over the layers, time heads | |
| concept_cross_attentions = einops.reduce( | |
| concept_cross_attentions, | |
| "layers time heads concepts patches -> concepts patches", | |
| reduction="mean" | |
| ) | |
| # Reshape the concept cross attentions | |
| concept_cross_attentions = einops.rearrange( | |
| concept_cross_attentions, | |
| "concepts (h w) -> concepts h w", | |
| h=64, | |
| w=64 | |
| ) | |
| return concept_cross_attentions, reconstructed_image |