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75 lines
2.3 KiB
Python
75 lines
2.3 KiB
Python
# Copyright (c) 2022 PaddlePaddle Authors. 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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import os
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import glob
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from . import fd_logging as logging
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#import fd_logging as logging
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class Cityscapes(object):
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"""
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Cityscapes dataset `https://www.cityscapes-dataset.com/`.
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The folder structure is as follow:
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cityscapes
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|--leftImg8bit
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| |--train
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| |--val
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| |--test
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|--gtFine
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| |--train
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| |--val
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| |--test
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Args:
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dataset_root (str): Cityscapes dataset directory.
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"""
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NUM_CLASSES = 19
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def __init__(self, dataset_root, mode):
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self.dataset_root = dataset_root
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self.file_list = list()
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mode = mode.lower()
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self.mode = mode
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self.num_classes = self.NUM_CLASSES
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self.ignore_index = 255
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img_dir = os.path.join(self.dataset_root, 'leftImg8bit')
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label_dir = os.path.join(self.dataset_root, 'gtFine')
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if self.dataset_root is None or not os.path.isdir(
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self.dataset_root) or not os.path.isdir(
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img_dir) or not os.path.isdir(label_dir):
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raise ValueError(
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"The dataset is not Found or the folder structure is nonconfoumance."
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)
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label_files = sorted(
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glob.glob(
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os.path.join(label_dir, mode, '*',
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'*_gtFine_labelTrainIds.png')))
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img_files = sorted(
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glob.glob(os.path.join(img_dir, mode, '*', '*_leftImg8bit.png')))
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self.file_list = [
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[img_path, label_path]
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for img_path, label_path in zip(img_files, label_files)
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]
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self.num_samples = len(self.file_list)
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logging.info("{} samples in file {}".format(self.num_samples, img_dir))
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