spikingjelly.datasets.asl_dvs 源代码

from typing import Callable, Dict,  Optional, Tuple
import spikingjelly.datasets as sjds
import scipy.io
from torchvision.datasets.utils import extract_archive
import os
import multiprocessing
from concurrent.futures import ThreadPoolExecutor
import time
import shutil
from .. import configure
from ..datasets import np_savez

[文档]class ASLDVS(sjds.NeuromorphicDatasetFolder): def __init__( self, root: str, data_type: str = 'event', frames_number: int = None, split_by: str = None, duration: int = None, custom_integrate_function: Callable = None, custom_integrated_frames_dir_name: str = None, transform: Optional[Callable] = None, target_transform: Optional[Callable] = None, ) -> None: """ The ASL-DVS dataset, which is proposed by `Graph-based Object Classification for Neuromorphic Vision Sensing <https://openaccess.thecvf.com/content_ICCV_2019/html/Bi_Graph-Based_Object_Classification_for_Neuromorphic_Vision_Sensing_ICCV_2019_paper.html>`_. Refer to :class:`spikingjelly.datasets.NeuromorphicDatasetFolder` for more details about params information. """ super().__init__(root, None, data_type, frames_number, split_by, duration, custom_integrate_function, custom_integrated_frames_dir_name, transform, target_transform)
[文档] @staticmethod def resource_url_md5() -> list: ''' :return: A list ``url`` that ``url[i]`` is a tuple, which contains the i-th file's name, download link, and MD5 :rtype: list ''' print('The ICCV2019_DVS_dataset.zip is packed by dropbox. We find that the MD5 of this zip file can change. So, MD5 check will not be used for this ASL-DVS dataset.') url = 'https://www.dropbox.com/sh/ibq0jsicatn7l6r/AACNrNELV56rs1YInMWUs9CAa?dl=0' return [ ('ICCV2019_DVS_dataset.zip', url, None) ]
[文档] @staticmethod def downloadable() -> bool: ''' :return: Whether the dataset can be directly downloaded by python codes. If not, the user have to download it manually :rtype: bool ''' return False
[文档] @staticmethod def extract_downloaded_files(download_root: str, extract_root: str): ''' :param download_root: Root directory path which saves downloaded dataset files :type download_root: str :param extract_root: Root directory path which saves extracted files from downloaded files :type extract_root: str :return: None This function defines how to extract download files. ''' temp_ext_dir = os.path.join(download_root, 'temp_ext') os.mkdir(temp_ext_dir) print(f'Mkdir [{temp_ext_dir}].') extract_archive(os.path.join(download_root, 'ICCV2019_DVS_dataset.zip'), temp_ext_dir) with ThreadPoolExecutor(max_workers=min(multiprocessing.cpu_count(), 2)) as tpe: sub_threads = [] for zip_file in os.listdir(temp_ext_dir): if os.path.splitext(zip_file)[1] == '.zip': zip_file = os.path.join(temp_ext_dir, zip_file) print(f'Extract [{zip_file}] to [{extract_root}].') sub_threads.append(tpe.submit(extract_archive, zip_file, extract_root)) for sub_thread in sub_threads: if sub_thread.exception(): print(sub_thread.exception()) exit(-1) shutil.rmtree(temp_ext_dir) print(f'Rmtree [{temp_ext_dir}].')
[文档] @staticmethod def load_origin_data(file_name: str) -> Dict: ''' :param file_name: path of the events file :type file_name: str :return: a dict whose keys are ``['t', 'x', 'y', 'p']`` and values are ``numpy.ndarray`` :rtype: Dict This function defines how to read the origin binary data. ''' events = scipy.io.loadmat(file_name) events = { 't': events['ts'].squeeze(), 'x': 239 - events['x'].squeeze(), 'y': 179 - events['y'].squeeze(), 'p': events['pol'].squeeze() } return events
[文档] @staticmethod def get_H_W() -> Tuple: ''' :return: A tuple ``(H, W)``, where ``H`` is the height of the data and ``W` is the weight of the data. For example, this function returns ``(128, 128)`` for the DVS128 Gesture dataset. :rtype: tuple ''' return 180, 240
[文档] @staticmethod def read_mat_save_to_np(mat_file: str, np_file: str): events = ASLDVS.load_origin_data(mat_file) np_savez(np_file, t=events['t'], x=events['x'], y=events['y'], p=events['p'] ) print(f'Save [{mat_file}] to [{np_file}].')
[文档] @staticmethod def create_events_np_files(extract_root: str, events_np_root: str): ''' :param extract_root: Root directory path which saves extracted files from downloaded files :type extract_root: str :param events_np_root: Root directory path which saves events files in the ``npz`` format :type events_np_root: :return: None This function defines how to convert the origin binary data in ``extract_root`` to ``npz`` format and save converted files in ``events_np_root``. ''' t_ckp = time.time() with ThreadPoolExecutor(max_workers=min(multiprocessing.cpu_count(), configure.max_threads_number_for_datasets_preprocess)) as tpe: sub_threads = [] for class_name in os.listdir(extract_root): mat_dir = os.path.join(extract_root, class_name) np_dir = os.path.join(events_np_root, class_name) os.mkdir(np_dir) print(f'Mkdir [{np_dir}].') for bin_file in os.listdir(mat_dir): source_file = os.path.join(mat_dir, bin_file) target_file = os.path.join(np_dir, os.path.splitext(bin_file)[0] + '.npz') print(f'Start to convert [{source_file}] to [{target_file}].') sub_threads.append(tpe.submit(ASLDVS.read_mat_save_to_np, source_file, target_file)) for sub_thread in sub_threads: if sub_thread.exception(): print(sub_thread.exception()) exit(-1) print(f'Used time = [{round(time.time() - t_ckp, 2)}s].')