mirror of
https://github.com/nerfstudio-project/nerfstudio.git
synced 2026-11-14 03:44:02 +08:00
Matthew TancikandBrent Yi
2b0831b6d4
* knocking out a couple * Fix more errors * Add pyright * Remove some unnecessary cv2 type ignores, warning on missing imports (for missing tinycudann) * Minor annotation fixes * Update docs * Drop `None` from temporal distortion output --------- Co-authored-by: Brent Yi <yibrenth@gmail.com>
87 lines
3.4 KiB
Python
87 lines
3.4 KiB
Python
# Copyright 2022 the Regents of the University of California, Nerfstudio Team and contributors. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Utility functions to allow easy re-use of common operations across dataloaders"""
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from pathlib import Path
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from typing import List, Tuple, Union
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import cv2
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import numpy as np
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import torch
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from PIL import Image
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def get_image_mask_tensor_from_path(filepath: Path, scale_factor: float = 1.0) -> torch.Tensor:
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"""
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Utility function to read a mask image from the given path and return a boolean tensor
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"""
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pil_mask = Image.open(filepath)
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if scale_factor != 1.0:
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width, height = pil_mask.size
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newsize = (int(width * scale_factor), int(height * scale_factor))
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pil_mask = pil_mask.resize(newsize, resample=Image.NEAREST)
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mask_tensor = torch.from_numpy(np.array(pil_mask)).unsqueeze(-1).bool()
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if len(mask_tensor.shape) != 3:
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raise ValueError("The mask image should have 1 channel")
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return mask_tensor
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def get_semantics_and_mask_tensors_from_path(
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filepath: Path, mask_indices: Union[List, torch.Tensor], scale_factor: float = 1.0
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) -> Tuple[torch.Tensor, torch.Tensor]:
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"""
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Utility function to read segmentation from the given filepath
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If no mask is required - use mask_indices = []
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"""
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if isinstance(mask_indices, List):
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mask_indices = torch.tensor(mask_indices, dtype=torch.int64).view(1, 1, -1)
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pil_image = Image.open(filepath)
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if scale_factor != 1.0:
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width, height = pil_image.size
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newsize = (int(width * scale_factor), int(height * scale_factor))
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pil_image = pil_image.resize(newsize, resample=Image.NEAREST)
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semantics = torch.from_numpy(np.array(pil_image, dtype="int64"))[..., None]
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mask = torch.sum(semantics == mask_indices, dim=-1, keepdim=True) == 0
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return semantics, mask
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def get_depth_image_from_path(
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filepath: Path,
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height: int,
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width: int,
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scale_factor: float,
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interpolation: int = cv2.INTER_NEAREST,
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) -> torch.Tensor:
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"""Loads, rescales and resizes depth images.
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Filepath points to a 16-bit or 32-bit depth image, or a numpy array `*.npy`.
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Args:
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filepath: Path to depth image.
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height: Target depth image height.
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width: Target depth image width.
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scale_factor: Factor by which to scale depth image.
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interpolation: Depth value interpolation for resizing.
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Returns:
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Depth image torch tensor with shape [width, height, 1].
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"""
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if filepath.suffix == ".npy":
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image = np.load(filepath) * scale_factor
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image = cv2.resize(image, (width, height), interpolation=interpolation)
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else:
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image = cv2.imread(str(filepath.absolute()), cv2.IMREAD_ANYDEPTH)
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image = image.astype(np.float64) * scale_factor
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image = cv2.resize(image, (width, height), interpolation=interpolation)
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return torch.from_numpy(image[:, :, np.newaxis])
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