def test_crop_grayscale(height=375, width=375): """ Test that centercrop works with pad and grayscale images """ def channel_swap(image): """ Py func hack for our pytransforms to work with c transforms """ return (image.transpose(1, 2, 0) * 255).astype(np.uint8) transforms = [ py_vision.Decode(), py_vision.Grayscale(1), py_vision.ToTensor(), (lambda image: channel_swap(image)) ] transform = py_vision.ComposeOp(transforms) data1 = ds.TFRecordDataset(DATA_DIR, SCHEMA_DIR, columns_list=["image"], shuffle=False) data1 = data1.map(input_columns=["image"], operations=transform()) # If input is grayscale, the output dimensions should be single channel crop_gray = vision.CenterCrop([height, width]) data1 = data1.map(input_columns=["image"], operations=crop_gray) for item1 in data1.create_dict_iterator(): c_image = item1["image"] # Check that the image is grayscale assert (c_image.ndim == 3 and c_image.shape[2] == 1)
def test_center_crop_op(height=375, width=375, plot=False): """ Test CenterCrop """ logger.info("Test CenterCrop") # First dataset data1 = ds.TFRecordDataset(DATA_DIR, SCHEMA_DIR, columns_list=["image"]) decode_op = vision.Decode() # 3 images [375, 500] [600, 500] [512, 512] center_crop_op = vision.CenterCrop([height, width]) data1 = data1.map(input_columns=["image"], operations=decode_op) data1 = data1.map(input_columns=["image"], operations=center_crop_op) # Second dataset data2 = ds.TFRecordDataset(DATA_DIR, SCHEMA_DIR, columns_list=["image"]) data2 = data2.map(input_columns=["image"], operations=decode_op) image_cropped = [] image = [] for item1, item2 in zip(data1.create_dict_iterator(), data2.create_dict_iterator()): image_cropped.append(item1["image"].copy()) image.append(item2["image"].copy()) if plot: visualize(image, image_cropped)
def create_dataset(dataset_path, do_train, repeat_num=1, batch_size=32, target="Ascend"): """ create a train or eval imagenet2012 dataset for resnet50 Args: dataset_path(string): the path of dataset. do_train(bool): whether dataset is used for train or eval. repeat_num(int): the repeat times of dataset. Default: 1 batch_size(int): the batch size of dataset. Default: 32 target(str): the device target. Default: Ascend Returns: dataset """ if target == "Ascend": device_num, rank_id = _get_rank_info() else: init("nccl") rank_id = get_rank() device_num = get_group_size() if device_num == 1: ds = de.ImageFolderDatasetV2(dataset_path, num_parallel_workers=8, shuffle=True) else: ds = de.ImageFolderDatasetV2(dataset_path, num_parallel_workers=8, shuffle=True, num_shards=device_num, shard_id=rank_id) image_size = 224 mean = [0.485 * 255, 0.456 * 255, 0.406 * 255] std = [0.229 * 255, 0.224 * 255, 0.225 * 255] # define map operations if do_train: trans = [ C.RandomCropDecodeResize(image_size, scale=(0.08, 1.0), ratio=(0.75, 1.333)), C.RandomHorizontalFlip(prob=0.5), C.Normalize(mean=mean, std=std), C.HWC2CHW() ] else: trans = [ C.Decode(), C.Resize(256), C.CenterCrop(image_size), C.Normalize(mean=mean, std=std), C.HWC2CHW() ] type_cast_op = C2.TypeCast(mstype.int32) ds = ds.map(input_columns="image", num_parallel_workers=8, operations=trans) ds = ds.map(input_columns="label", num_parallel_workers=8, operations=type_cast_op) # apply batch operations ds = ds.batch(batch_size, drop_remainder=True) # apply dataset repeat operation ds = ds.repeat(repeat_num) return ds
def test_center_crop_comp(height=375, width=375, plot=False): """ Test CenterCrop between python and c image augmentation """ logger.info("Test CenterCrop") # First dataset data1 = ds.TFRecordDataset(DATA_DIR, SCHEMA_DIR, columns_list=["image"], shuffle=False) decode_op = vision.Decode() center_crop_op = vision.CenterCrop([height, width]) data1 = data1.map(input_columns=["image"], operations=decode_op) data1 = data1.map(input_columns=["image"], operations=center_crop_op) # Second dataset data2 = ds.TFRecordDataset(DATA_DIR, SCHEMA_DIR, columns_list=["image"], shuffle=False) transforms = [ py_vision.Decode(), py_vision.CenterCrop([height, width]), py_vision.ToTensor() ] transform = py_vision.ComposeOp(transforms) data2 = data2.map(input_columns=["image"], operations=transform()) image_c_cropped = [] image_py_cropped = [] for item1, item2 in zip(data1.create_dict_iterator(), data2.create_dict_iterator()): c_image = item1["image"] py_image = (item2["image"].transpose(1, 2, 0) * 255).astype(np.uint8) # Note: The images aren't exactly the same due to rounding error assert diff_mse(py_image, c_image) < 0.001 image_c_cropped.append(c_image.copy()) image_py_cropped.append(py_image.copy()) if plot: visualize_list(image_c_cropped, image_py_cropped, visualize_mode=2)
def create_dataset(dataset_path, do_train, config, device_target, repeat_num=1, batch_size=32): """ create a train or eval dataset Args: dataset_path(string): the path of dataset. do_train(bool): whether dataset is used for train or eval. repeat_num(int): the repeat times of dataset. Default: 1 batch_size(int): the batch size of dataset. Default: 32 Returns: dataset """ if device_target == "GPU": if do_train: from mindspore.communication.management import get_rank, get_group_size ds = de.ImageFolderDatasetV2(dataset_path, num_parallel_workers=8, shuffle=True, num_shards=get_group_size(), shard_id=get_rank()) else: ds = de.ImageFolderDatasetV2(dataset_path, num_parallel_workers=8, shuffle=True) else: raise ValueError("Unsupported device_target.") resize_height = config.image_height resize_width = config.image_width buffer_size = 1000 # define map operations decode_op = C.Decode() resize_crop_op = C.RandomCropDecodeResize(resize_height, scale=(0.08, 1.0), ratio=(0.75, 1.333)) horizontal_flip_op = C.RandomHorizontalFlip(prob=0.5) resize_op = C.Resize(256) center_crop = C.CenterCrop(resize_width) rescale_op = C.RandomColorAdjust(brightness=0.4, contrast=0.4, saturation=0.4) normalize_op = C.Normalize(mean=[0.485*255, 0.456*255, 0.406*255], std=[0.229*255, 0.224*255, 0.225*255]) change_swap_op = C.HWC2CHW() if do_train: trans = [resize_crop_op, horizontal_flip_op, rescale_op, normalize_op, change_swap_op] else: trans = [decode_op, resize_op, center_crop, normalize_op, change_swap_op] type_cast_op = C2.TypeCast(mstype.int32) ds = ds.map(input_columns="image", operations=trans, num_parallel_workers=8) ds = ds.map(input_columns="label", operations=type_cast_op, num_parallel_workers=8) # apply shuffle operations ds = ds.shuffle(buffer_size=buffer_size) # apply batch operations ds = ds.batch(batch_size, drop_remainder=True) # apply dataset repeat operation ds = ds.repeat(repeat_num) return ds
def create_dataset(dataset_path, do_train, repeat_num=1, batch_size=32): """ create a train or eval dataset Args: dataset_path(string): the path of dataset. do_train(bool): whether dataset is used for train or eval. repeat_num(int): the repeat times of dataset. Default: 1 batch_size(int): the batch size of dataset. Default: 32 Returns: dataset """ rank_size = int(os.getenv("RANK_SIZE")) rank_id = int(os.getenv("RANK_ID")) if rank_size == 1: ds = de.ImageFolderDatasetV2(dataset_path, num_parallel_workers=8, shuffle=True) else: ds = de.ImageFolderDatasetV2(dataset_path, num_parallel_workers=8, shuffle=True, num_shards=rank_size, shard_id=rank_id) resize_height = config.image_height resize_width = config.image_width buffer_size = 1000 # define map operations decode_op = C.Decode() resize_crop_op = C.RandomCropDecodeResize(resize_height, scale=(0.08, 1.0), ratio=(0.75, 1.333)) horizontal_flip_op = C.RandomHorizontalFlip(prob=0.5) resize_op = C.Resize((256, 256)) center_crop = C.CenterCrop(resize_width) rescale_op = C.RandomColorAdjust(brightness=0.4, contrast=0.4, saturation=0.4) normalize_op = C.Normalize(mean=[0.485*255, 0.456*255, 0.406*255], std=[0.229*255, 0.224*255, 0.225*255]) change_swap_op = C.HWC2CHW() if do_train: trans = [resize_crop_op, horizontal_flip_op, rescale_op, normalize_op, change_swap_op] else: trans = [decode_op, resize_op, center_crop, rescale_op, normalize_op, change_swap_op] type_cast_op = C2.TypeCast(mstype.int32) ds = ds.map(input_columns="image", operations=trans, num_parallel_workers=8) ds = ds.map(input_columns="label", operations=type_cast_op, num_parallel_workers=8) # apply shuffle operations ds = ds.shuffle(buffer_size=buffer_size) # apply batch operations ds = ds.batch(batch_size, drop_remainder=True) # apply dataset repeat operation ds = ds.repeat(repeat_num) return ds
def create_dataset(dataset_path, config, do_train, repeat_num=1): """ create a train or eval dataset Args: dataset_path(string): the path of dataset. config(dict): config of dataset. do_train(bool): whether dataset is used for train or eval. repeat_num(int): the repeat times of dataset. Default: 1. Returns: dataset """ rank = config.rank group_size = config.group_size if group_size == 1: ds = de.ImageFolderDatasetV2(dataset_path, num_parallel_workers=config.work_nums, shuffle=True) else: ds = de.ImageFolderDatasetV2(dataset_path, num_parallel_workers=config.work_nums, shuffle=True, num_shards=group_size, shard_id=rank) # define map operations if do_train: trans = [ C.RandomCropDecodeResize(config.image_size), C.RandomHorizontalFlip(prob=0.5), C.RandomColorAdjust(brightness=0.4, saturation=0.5) # fast mode #C.RandomColorAdjust(brightness=0.4, contrast=0.5, saturation=0.5, hue=0.2) ] else: trans = [ C.Decode(), C.Resize(int(config.image_size / 0.875)), C.CenterCrop(config.image_size) ] trans += [ C.Rescale(1.0 / 255.0, 0.0), C.Normalize(mean=[0.5, 0.5, 0.5], std=[0.5, 0.5, 0.5]), C.HWC2CHW() ] type_cast_op = C2.TypeCast(mstype.int32) ds = ds.map(input_columns="image", operations=trans, num_parallel_workers=config.work_nums) ds = ds.map(input_columns="label", operations=type_cast_op, num_parallel_workers=config.work_nums) # apply batch operations ds = ds.batch(config.batch_size, drop_remainder=True) # apply dataset repeat operation ds = ds.repeat(repeat_num) return ds
def create_dataset(dataset_path, do_train, repeat_num=1, batch_size=32): """ create a train or eval dataset Args: dataset_path(string): the path of dataset. do_train(bool): whether dataset is used for train or eval. repeat_num(int): the repeat times of dataset. Default: 1 batch_size(int): the batch size of dataset. Default: 32 Returns: dataset """ device_num = int(os.getenv("RANK_SIZE")) rank_id = int(os.getenv("RANK_ID")) if device_num == 1: ds = de.ImageFolderDatasetV2(dataset_path, num_parallel_workers=8, shuffle=False) else: ds = de.ImageFolderDatasetV2(dataset_path, num_parallel_workers=8, shuffle=True, num_shards=device_num, shard_id=rank_id) image_size = 224 mean = [0.485 * 255, 0.456 * 255, 0.406 * 255] std = [0.229 * 255, 0.224 * 255, 0.225 * 255] if do_train: transform_img = [ V_C.RandomCropDecodeResize(image_size, scale=(0.08, 1.0), ratio=(0.75, 1.333)), V_C.RandomHorizontalFlip(prob=0.5), V_C.Normalize(mean=mean, std=std), V_C.HWC2CHW() ] else: transform_img = [ V_C.Decode(), V_C.Resize((256, 256)), V_C.CenterCrop(image_size), V_C.Normalize(mean=mean, std=std), V_C.HWC2CHW() ] # type_cast_op = C2.TypeCast(mstype.float16) type_cast_op = C2.TypeCast(mstype.int32) ds = ds.map(input_columns="image", operations=transform_img, num_parallel_workers=8) ds = ds.map(input_columns="label", operations=type_cast_op, num_parallel_workers=8) # apply shuffle operations # ds = ds.shuffle(buffer_size=config.buffer_size) # apply batch operations ds = ds.batch(batch_size, drop_remainder=True) # apply dataset repeat operation ds = ds.repeat(repeat_num) return ds
def create_dataset(dataset_path, do_train, rank, group_size, repeat_num=1): """ create a train or eval dataset Args: dataset_path(string): the path of dataset. do_train(bool): whether dataset is used for train or eval. rank (int): The shard ID within num_shards (default=None). group_size (int): Number of shards that the dataset should be divided into (default=None). repeat_num(int): the repeat times of dataset. Default: 1. Returns: dataset """ if group_size == 1: ds = de.ImageFolderDatasetV2(dataset_path, num_parallel_workers=cfg.work_nums, shuffle=True) else: ds = de.ImageFolderDatasetV2(dataset_path, num_parallel_workers=cfg.work_nums, shuffle=True, num_shards=group_size, shard_id=rank) # define map operations if do_train: trans = [ C.RandomCropDecodeResize(299, scale=(0.08, 1.0), ratio=(0.75, 1.333)), C.RandomHorizontalFlip(prob=0.5), C.RandomColorAdjust(brightness=0.4, contrast=0.4, saturation=0.4) ] else: trans = [C.Decode(), C.Resize(299), C.CenterCrop(299)] trans += [ C.Rescale(1.0 / 255.0, 0.0), C.Normalize(mean=[0.485, 0.456, 0.406], std=[0.229, 0.224, 0.225]), C.HWC2CHW() ] type_cast_op = C2.TypeCast(mstype.int32) ds = ds.map(input_columns="image", operations=trans, num_parallel_workers=cfg.work_nums) ds = ds.map(input_columns="label", operations=type_cast_op, num_parallel_workers=cfg.work_nums) # apply batch operations ds = ds.batch(cfg.batch_size, drop_remainder=True) # apply dataset repeat operation ds = ds.repeat(repeat_num) return ds
def test_center_crop_md5(height=375, width=375): """ Test CenterCrop """ logger.info("Test CenterCrop") # First dataset data1 = ds.TFRecordDataset(DATA_DIR, SCHEMA_DIR, columns_list=["image"], shuffle=False) decode_op = vision.Decode() # 3 images [375, 500] [600, 500] [512, 512] center_crop_op = vision.CenterCrop([height, width]) data1 = data1.map(input_columns=["image"], operations=decode_op) data1 = data1.map(input_columns=["image"], operations=center_crop_op) # Compare with expected md5 from images filename = "center_crop_01_result.npz" save_and_check_md5(data1, filename, generate_golden=GENERATE_GOLDEN)
def test_celeba_dataset_op(): data = ds.CelebADataset(DATA_DIR, decode=True, num_shards=1, shard_id=0) crop_size = (80, 80) resize_size = (24, 24) # define map operations data = data.repeat(2) center_crop = vision.CenterCrop(crop_size) resize_op = vision.Resize(resize_size, Inter.LINEAR) # Bilinear mode data = data.map(input_columns=["image"], operations=center_crop) data = data.map(input_columns=["image"], operations=resize_op) count = 0 for item in data.create_dict_iterator(): logger.info("----------image--------") logger.info(item["image"]) count = count + 1 assert (count == 4)
def create_dataset(dataset_path, do_train, repeat_num=1, batch_size=32): """ create a train or eval dataset Args: dataset_path(string): the path of dataset. do_train(bool): whether dataset is used for train or eval. repeat_num(int): the repeat times of dataset. Default: 1 batch_size(int): the batch size of dataset. Default: 32 Returns: dataset """ device_num = int(os.getenv("RANK_SIZE")) try: # global_rank_id = int(os.getenv('RANK_ID').split("-")[1].split("custom")[1]) global_rank_id = int(os.getenv('RANK_ID').split("-")[-1]) except: global_rank_id = 0 rank_id = int(os.getenv('DEVICE_ID')) + global_rank_id * 8 columns_list = ["data", "label"] if do_train: ds = de.MindDataset(dataset_path + '/imagenet_train.mindrecord00', columns_list, num_parallel_workers=8, shuffle=True, num_shards=device_num, shard_id=rank_id) print("train dataset size", ds.get_dataset_size()) else: padded_sample = {} white_io = BytesIO() Image.new('RGB', (224, 224), (255, 255, 255)).save(white_io, 'JPEG') padded_sample['data'] = white_io.getvalue() padded_sample['label'] = -1 batch_per_step = batch_size * device_num print("eval batch per step:", batch_per_step) if batch_per_step < 50000: if 50000 % batch_per_step == 0: num_padded = 0 else: num_padded = batch_per_step - (50000 % batch_per_step) else: num_padded = batch_per_step - 50000 print("Padded samples:", num_padded) ds = de.MindDataset(dataset_path + '/imagenet_eval.mindrecord0', columns_list, num_parallel_workers=8, shuffle=False, num_shards=device_num, shard_id=rank_id, padded_sample=padded_sample, num_padded=num_padded) print("eval dataset size", ds.get_dataset_size()) image_size = 224 mean = [0.485 * 255, 0.456 * 255, 0.406 * 255] std = [0.229 * 255, 0.224 * 255, 0.225 * 255] # define map operations if do_train: trans = [ C.RandomCropDecodeResize(image_size, scale=(0.08, 1.0), ratio=(0.75, 1.333)), C.RandomHorizontalFlip(prob=0.5), C.Normalize(mean=mean, std=std), C.HWC2CHW() ] else: trans = [ C.Decode(), C.Resize((365, 365)), C.CenterCrop(320), C.Normalize(mean=mean, std=std), C.HWC2CHW() ] type_cast_op = C2.TypeCast(mstype.int32) # ds = ds.shuffle(buffer_size=100000) ds = ds.map(input_columns="data", num_parallel_workers=8, operations=trans) ds = ds.map(input_columns="label", num_parallel_workers=8, operations=type_cast_op) # apply batch operations ds = ds.batch(batch_size, drop_remainder=True) # apply dataset repeat operation ds = ds.repeat(repeat_num) return ds
def classification_dataset(data_dir, image_size, per_batch_size, rank=0, group_size=1, mode='train', input_mode='folder', root='', num_parallel_workers=None, shuffle=None, sampler=None, repeat_num=1, class_indexing=None, drop_remainder=True, transform=None, target_transform=None): """ A function that returns a dataset for classification. The mode of input dataset could be "folder" or "txt". If it is "folder", all images within one folder have the same label. If it is "txt", all paths of images are written into a textfile. Args: data_dir (str): Path to the root directory that contains the dataset for "input_mode="folder"". Or path of the textfile that contains every image's path of the dataset. image_size (str): Size of the input images. per_batch_size (int): the batch size of evey step during training. rank (int): The shard ID within num_shards (default=None). group_size (int): Number of shards that the dataset should be divided into (default=None). mode (str): "train" or others. Default: " train". input_mode (str): The form of the input dataset. "folder" or "txt". Default: "folder". root (str): the images path for "input_mode="txt"". Default: " ". num_parallel_workers (int): Number of workers to read the data. Default: None. shuffle (bool): Whether or not to perform shuffle on the dataset (default=None, performs shuffle). sampler (Sampler): Object used to choose samples from the dataset. Default: None. repeat_num (int): the num of repeat dataset. class_indexing (dict): A str-to-int mapping from folder name to index (default=None, the folder names will be sorted alphabetically and each class will be given a unique index starting from 0). Examples: >>> from mindvision.common.datasets.classification import classification_dataset >>> # path to imagefolder directory. This directory needs to contain sub-directories which contain the images >>> dataset_dir = "/path/to/imagefolder_directory" >>> de_dataset = classification_dataset(train_data_dir, image_size=[224, 244], >>> per_batch_size=64, rank=0, group_size=4) >>> # Path of the textfile that contains every image's path of the dataset. >>> dataset_dir = "/path/to/dataset/images/train.txt" >>> images_dir = "/path/to/dataset/images" >>> de_dataset = classification_dataset(train_data_dir, image_size=[224, 244], >>> per_batch_size=64, rank=0, group_size=4, >>> input_mode="txt", root=images_dir) """ mean = [0.485 * 255, 0.456 * 255, 0.406 * 255] std = [0.229 * 255, 0.224 * 255, 0.225 * 255] if transform is None: if mode == 'train': transform_img = [ vision.RandomCropDecodeResize(image_size, scale=(0.08, 1.0)), vision.RandomHorizontalFlip(prob=0.5), vision.Normalize(mean=mean, std=std), vision.HWC2CHW() ] else: transform_img = [ vision.Decode(), vision.Resize((256, 256)), vision.CenterCrop(image_size), vision.Normalize(mean=mean, std=std), vision.HWC2CHW() ] else: transform_img = transform if target_transform is None: transform_label = [C.TypeCast(mstype.int32)] else: transform_label = target_transform if input_mode == 'folder': de_dataset = de.ImageFolderDatasetV2( data_dir, num_parallel_workers=num_parallel_workers, shuffle=shuffle, sampler=sampler, class_indexing=class_indexing, num_shards=group_size, shard_id=rank) else: dataset = TxtDataset(root, data_dir) sampler = DistributedSampler(dataset, rank, group_size, shuffle=shuffle) de_dataset = de.GeneratorDataset(dataset, ["image", "label"], sampler=sampler) de_dataset.set_dataset_size(len(sampler)) de_dataset = de_dataset.map(input_columns="image", num_parallel_workers=8, operations=transform_img) de_dataset = de_dataset.map(input_columns="label", num_parallel_workers=8, operations=transform_label) columns_to_project = ["image", "label"] de_dataset = de_dataset.project(columns=columns_to_project) de_dataset = de_dataset.batch(per_batch_size, drop_remainder=drop_remainder) de_dataset = de_dataset.repeat(repeat_num) return de_dataset
def create_dataset3(dataset_path, do_train, repeat_num=1, batch_size=32): """ create a train or eval imagenet2012 dataset for resnet101 Args: dataset_path(string): the path of dataset. do_train(bool): whether dataset is used for train or eval. repeat_num(int): the repeat times of dataset. Default: 1 batch_size(int): the batch size of dataset. Default: 32 Returns: dataset """ device_num = int(os.getenv("RANK_SIZE")) rank_id = int(os.getenv("RANK_ID")) if device_num == 1: ds = de.ImageFolderDatasetV2(dataset_path, num_parallel_workers=8, shuffle=True) else: ds = de.ImageFolderDatasetV2(dataset_path, num_parallel_workers=8, shuffle=True, num_shards=device_num, shard_id=rank_id) resize_height = 224 rescale = 1.0 / 255.0 shift = 0.0 # define map operations decode_op = C.Decode() random_resize_crop_op = C.RandomResizedCrop(resize_height, (0.08, 1.0), (0.75, 1.33), max_attempts=100) horizontal_flip_op = C.RandomHorizontalFlip(rank_id / (rank_id + 1)) resize_op_256 = C.Resize((256, 256)) center_crop = C.CenterCrop(224) rescale_op = C.Rescale(rescale, shift) normalize_op = C.Normalize((0.475, 0.451, 0.392), (0.275, 0.267, 0.278)) changeswap_op = C.HWC2CHW() if do_train: trans = [decode_op, random_resize_crop_op, horizontal_flip_op, rescale_op, normalize_op, changeswap_op] else: trans = [decode_op, resize_op_256, center_crop, rescale_op, normalize_op, changeswap_op] type_cast_op = C2.TypeCast(mstype.int32) ds = ds.map(input_columns="image", operations=trans, num_parallel_workers=8) ds = ds.map(input_columns="label", operations=type_cast_op, num_parallel_workers=8) # apply batch operations ds = ds.batch(batch_size, drop_remainder=True) # apply dataset repeat operation ds = ds.repeat(repeat_num) return ds
def create_dataset(dataset_path, do_train, repeat_num=1, batch_size=32, target="Ascend"): """ create a train or eval dataset Args: dataset_path(string): the path of dataset. do_train(bool): whether dataset is used for train or eval. repeat_num(int): the repeat times of dataset. Default: 1 batch_size(int): the batch size of dataset. Default: 32 target(str): the device target. Default: Ascend Returns: dataset """ if target == "Ascend": device_num = int(os.getenv("RANK_SIZE")) rank_id = int(os.getenv("RANK_ID")) else: init("nccl") rank_id = get_rank() device_num = get_group_size() columns_list = ['image', 'label'] if config.data_load_mode == "mindrecord": load_func = partial(de.MindDataset, dataset_path, columns_list) else: load_func = partial(de.ImageFolderDatasetV2, dataset_path) if device_num == 1: ds = load_func(num_parallel_workers=8, shuffle=True) else: ds = load_func(num_parallel_workers=8, shuffle=True, num_shards=device_num, shard_id=rank_id) image_size = config.image_height mean = [0.485 * 255, 0.456 * 255, 0.406 * 255] std = [0.229 * 255, 0.224 * 255, 0.225 * 255] # define map operations if do_train: trans = [ C.RandomCropDecodeResize(image_size, scale=(0.08, 1.0), ratio=(0.75, 1.333)), C.RandomHorizontalFlip(prob=0.5), C.Normalize(mean=mean, std=std), C.HWC2CHW() ] else: trans = [ C.Decode(), C.Resize(256), C.CenterCrop(image_size), C.Normalize(mean=mean, std=std), C.HWC2CHW() ] type_cast_op = C2.TypeCast(mstype.int32) ds = ds.map(input_columns="image", num_parallel_workers=8, operations=trans) ds = ds.map(input_columns="label", num_parallel_workers=8, operations=type_cast_op) # apply batch operations ds = ds.batch(batch_size, drop_remainder=True) # apply dataset repeat operation ds = ds.repeat(repeat_num) return ds
def create_dataset(dataset_path, do_train, config, device_target, repeat_num=1, batch_size=32): """ create a train or eval dataset Args: dataset_path(string): the path of dataset. do_train(bool): whether dataset is used for train or eval. repeat_num(int): the repeat times of dataset. Default: 1. batch_size(int): the batch size of dataset. Default: 32. Returns: dataset """ if device_target == "Ascend": rank_size = int(os.getenv("RANK_SIZE")) rank_id = int(os.getenv("RANK_ID")) columns_list = ['image', 'label'] if config.data_load_mode == "mindrecord": load_func = partial(de.MindDataset, dataset_path, columns_list) else: load_func = partial(de.ImageFolderDatasetV2, dataset_path) if do_train: if rank_size == 1: ds = load_func(num_parallel_workers=8, shuffle=True) else: ds = load_func(num_parallel_workers=8, shuffle=True, num_shards=rank_size, shard_id=rank_id) else: ds = load_func(num_parallel_workers=8, shuffle=False) elif device_target == "GPU": if do_train: from mindspore.communication.management import get_rank, get_group_size ds = de.ImageFolderDatasetV2(dataset_path, num_parallel_workers=8, shuffle=True, num_shards=get_group_size(), shard_id=get_rank()) else: ds = de.ImageFolderDatasetV2(dataset_path, num_parallel_workers=8, shuffle=True) else: raise ValueError("Unsupported device_target.") resize_height = config.image_height if do_train: buffer_size = 20480 # apply shuffle operations ds = ds.shuffle(buffer_size=buffer_size) # define map operations decode_op = C.Decode() resize_crop_decode_op = C.RandomCropDecodeResize(resize_height, scale=(0.08, 1.0), ratio=(0.75, 1.333)) horizontal_flip_op = C.RandomHorizontalFlip(prob=0.5) resize_op = C.Resize(256) center_crop = C.CenterCrop(resize_height) normalize_op = C.Normalize(mean=[0.485 * 255, 0.456 * 255, 0.406 * 255], std=[0.229 * 255, 0.224 * 255, 0.225 * 255]) change_swap_op = C.HWC2CHW() if do_train: trans = [ resize_crop_decode_op, horizontal_flip_op, normalize_op, change_swap_op ] else: trans = [ decode_op, resize_op, center_crop, normalize_op, change_swap_op ] type_cast_op = C2.TypeCast(mstype.int32) ds = ds.map(input_columns="image", operations=trans, num_parallel_workers=16) ds = ds.map(input_columns="label", operations=type_cast_op, num_parallel_workers=8) # apply batch operations ds = ds.batch(batch_size, drop_remainder=True) # apply dataset repeat operation ds = ds.repeat(repeat_num) return ds