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some cleanup/updates to caption stuff
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""" | ||
Copyright [2022-2024] Victor C Hall | ||
Licensed under the GNU Affero General Public License; | ||
You may not use this code except in compliance with the License. | ||
You may obtain a copy of the License at | ||
https://www.gnu.org/licenses/agpl-3.0.en.html | ||
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. | ||
""" | ||
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import os | ||
from typing import Generator | ||
from data.image_train_item import ImageTrainItem, ImageCaption | ||
from PIL import Image, ImageOps | ||
import tarfile | ||
import logging | ||
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SUPPORTED_EXT = [".jpg", ".png", ".jpeg", ".bmp", ".jfif", ".webp"] | ||
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class BucketBatchedGenerator(Generator[ImageTrainItem, None, None]): | ||
""" | ||
returns items in with the same aspect ratio in batches, for use with batching dataloaders | ||
""" | ||
def __init__(self, batch_size: int=1, generator: Generator[ImageTrainItem, None, None]=None): | ||
self.caption = batch_size | ||
self.cache = {} | ||
self.generator = generator | ||
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def __iter__(self): | ||
for item in self.generator: | ||
if item.target_wh: | ||
aspect_bucket_key = item.target_wh | ||
if aspect_bucket_key not in self.cache: | ||
self.cache[aspect_bucket_key] = [] | ||
self.cache[aspect_bucket_key].append(item) | ||
if len(self.cache[aspect_bucket_key]) >= self.batch_size: | ||
for item in self.cache[aspect_bucket_key]: | ||
yield item | ||
self.cache[aspect_bucket_key] = [] | ||
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# def image_train_item_generator_from_tar_pairs(image_dir: str, do_recurse: bool = True) -> Generator[ImageTrainItem, None, None]: | ||
# for root, dirs, files in os.walk(image_dir): | ||
# for file in files: | ||
# if file.endswith(".tar"): | ||
# tar_path = os.path.join(root, file) | ||
# with tarfile.open(tar_path, "r") as tar: | ||
# for tarinfo in tar: | ||
# if tarinfo.isfile() and any(tarinfo.name.endswith(ext) for ext in SUPPORTED_EXT): | ||
# try: | ||
# img = Image.open(tar.extractfile(tarinfo)) | ||
# txt = tar.extractfile(tarinfo.name.replace(os.path.splitext(tarinfo.name)[-1], ".txt")) | ||
# caption = txt.read().decode("utf-8") | ||
# img_caption = ImageCaption(main_prompt=caption, rating=0, tags=[], tag_weights=[], max_target_length=256, use_weights=False) | ||
# img = ImageOps.exif_transpose(img) | ||
# iti = ImageTrainItem(img, img_caption) | ||
# except Exception as e: | ||
# logging.error(f"Failed to open {tarinfo.name}: {e}") | ||
# continue | ||
# yield iti | ||
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def image_train_item_generator_from_files(image_dir: str, do_recurse: bool = True) -> Generator[ImageTrainItem, None, None]: | ||
for img_path in image_path_generator(image_dir, do_recurse): | ||
try: | ||
img = Image.open(img_path) | ||
img = ImageOps.exif_transpose(img) | ||
except Exception as e: | ||
print(f"Failed to open {img_path}: {e}") | ||
continue | ||
# main_prompt: str, rating: float, tags: list[str], tag_weights: list[float], max_target_length: int, use_weights: bool): | ||
txt_cap_path = img_path.replace(os.path.splitext(img_path)[-1], ".txt") | ||
if os.path.exists(txt_cap_path): | ||
with open(txt_cap_path, "r") as f: | ||
caption = f.read() | ||
if not caption or len(caption) < 1: | ||
caption = os.path.basename(img_path) | ||
caption = caption.split("_")[0] | ||
image_caption = ImageCaption(main_prompt=caption, rating=0, tags=[], tag_weights=[], max_target_length=128, use_weights=False) | ||
iti = ImageTrainItem(img) | ||
yield iti | ||
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def image_path_generator(image_dir: str, do_recurse: bool = True) -> Generator[str, None, None]: | ||
if do_recurse: | ||
for root, dirs, files in os.walk(image_dir): | ||
for file in files: | ||
if any(file.endswith(ext) for ext in SUPPORTED_EXT): | ||
yield os.path.join(root, file) | ||
else: | ||
for file in os.listdir(image_dir): | ||
if any(file.endswith(ext) for ext in SUPPORTED_EXT): | ||
yield os.path.join(image_dir, file) |
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