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| import random | |
| import torch | |
| import torch.nn as nn | |
| import numpy as np | |
| from PIL import Image | |
| from dataclasses import dataclass | |
| from torchvision.transforms import Normalize | |
| from torchvision.transforms import InterpolationMode | |
| from torchvision.transforms.transforms import _interpolation_modes_from_int | |
| from transformers import CLIPModel, CLIPTokenizer, CLIPImageProcessor | |
| from transformers.utils import ModelOutput | |
| from typing import Iterable, Optional, Union, List | |
| import craftsman | |
| from craftsman.utils.base import BaseModule | |
| from craftsman.utils.typing import * | |
| ImageType = Union[np.ndarray, torch.Tensor, Image.Image] | |
| class BaseEmbedder(BaseModule): | |
| class Config(BaseModule.Config): | |
| pretrained_model_name_or_path: Optional[str] = None # the pretrained model name or path | |
| encode_camera: bool = False # whether to encode camera | |
| camera_embeds_type: str = "sincos" # the type of camera embeds | |
| camera_embeds_dim: Optional[int] = None # the dimension of camera embeds | |
| n_views: int = 1 # the number of views | |
| empty_embeds_ratio: float = 0.1 # the ratio of empty embeds | |
| zero_uncond_embeds: bool = True | |
| normalize_embeds: bool = False # whether to normalize the embeds | |
| cfg: Config | |
| def configure(self) -> None: | |
| super().configure() | |
| if self.cfg.encode_camera: | |
| self.distance = 1.0 | |
| self.register_buffer( | |
| "cameras", | |
| torch.as_tensor([ | |
| [[1, 0, 0, 0], | |
| [0, 0, -1, -self.distance], | |
| [0, 1, 0, 0], | |
| [0, 0, 0, 1]], # front to back | |
| [[0, 0, 1, self.distance], | |
| [1, 0, 0, 0], | |
| [0, 1, 0, 0], | |
| [0, 0, 0, 1]], # right to left | |
| [[-1, 0, 0, 0], | |
| [0, 0, 1, self.distance], | |
| [0, 1, 0, 0], | |
| [0, 0, 0, 1]], # back to front | |
| [[0, 0, -1, -self.distance], | |
| [-1, 0, 0, 0], | |
| [0, 1, 0, 0], | |
| [0, 0, 0, 1]], # left to right | |
| ], dtype=torch.float32), | |
| ) | |
| def encode_image(self, images: Iterable[Optional[ImageType]], camera_embeds: Optional[torch.Tensor] = None, **kwargs) -> torch.FloatTensor: | |
| pass | |
| def encode_text(self, texts: List[str], **kwargs) -> torch.FloatTensor: | |
| pass | |
| def encode_camera(self, c2ws: torch.Tensor): | |
| if self.cfg.camera_embeds_type == "sincos": | |
| assert c2ws.shape[-1] == 4 and c2ws.shape[-2] == 4, f"Invalid c2ws shape: {c2ws.shape}" | |
| c2ws = c2ws.view(-1, 16) | |
| return torch.cat([torch.sin(c2ws), torch.cos(c2ws)], dim=-1) | |
| else: | |
| raise NotImplementedError(f"Unknown camera_embeds_type: {self.cfg.camera_embeds_type}") | |
| def post_process_embeds(self, text_embeds, visual_embeds): | |
| bs = text_embeds.shape[0] if text_embeds is not None else visual_embeds.shape[0] | |
| if self.cfg.normalize_embeds: | |
| # post-process the text/visual embeds | |
| if text_embeds is not None: | |
| text_embeds = text_embeds / text_embeds.norm(dim=-1, keepdim=True) | |
| if visual_embeds is not None: | |
| visual_embeds = visual_embeds / visual_embeds.norm(dim=-1, keepdim=True) | |
| assert text_embeds is not None or visual_embeds is not None | |
| # return text_embeds, visual_embeds | |
| if text_embeds is not None and visual_embeds is not None: | |
| return torch.cat([text_embeds, visual_embeds], dim=1) | |
| elif text_embeds is not None: | |
| return text_embeds | |
| else: | |
| return visual_embeds | |
| def forward(self, batch): | |
| bs = batch["surface"].shape[0] | |
| text_embeds, visual_embeds = None, None | |
| if random.random() < self.cfg.empty_embeds_ratio: | |
| if "text_input_ids" in batch or "text_embeds" in batch: | |
| if self.empty_text_embeds is None: | |
| if not self.cfg.zero_uncond_embeds: | |
| self.empty_text_embeds = self.encode_text([""]).detach() # [1, 77, 768] | |
| text_embeds = self.empty_text_embeds.repeat(bs, 1, 1) | |
| if "image" in batch or "image_embeds" in batch: | |
| visual_embeds = self.empty_image_embeds.repeat(bs, 1, 1) | |
| elif "mvimages" in batch or "mvimage_embeds" in batch: | |
| visual_embeds = self.empty_image_embeds.unsqueeze(1).repeat(bs, 1, 1, 1) | |
| else: | |
| # for text inputs | |
| if "text_input_ids" in batch: | |
| text_embeds = self.encode_text(batch["text_input_ids"]) | |
| # for visual inputs | |
| if "image" in batch: | |
| if self.cfg.encode_camera: | |
| visual_embeds = self.encode_image(batch["image"], cameras=batch["c2w"]) | |
| else: | |
| visual_embeds = self.encode_image(batch["image"]) | |
| elif "mvimages" in batch: | |
| n_views = batch["mvimages"].shape[1] | |
| if self.cfg.encode_camera: | |
| visual_embeds = self.encode_image( | |
| batch["mvimages"].view(-1, *batch["mvimages"].shape[-3:]), \ | |
| cameras=batch["c2ws"]).view(bs, n_views, *self.empty_image_embeds.shape[-2:]) | |
| else: | |
| visual_embeds = self.encode_image( | |
| batch["mvimages"].view(-1, *batch["mvimages"].shape[-3:])).view(bs, n_views, *self.empty_image_embeds.shape[-2:]) | |
| return self.post_process_embeds(text_embeds, visual_embeds) | |