tf.keras.preprocessing.image.DirectoryIterator

Iterator capable of reading images from a directory on disk.

Inherits From: Iterator, PyDataset

tf.keras.preprocessing.image.DirectoryIterator(
    directory,
    image_data_generator,
    target_size=(256, 256),
    color_mode='rgb',
    classes=None,
    class_mode='categorical',
    batch_size=32,
    shuffle=True,
    seed=None,
    data_format=None,
    save_to_dir=None,
    save_prefix='',
    save_format='png',
    follow_links=False,
    subset=None,
    interpolation='nearest',
    keep_aspect_ratio=False,
    dtype=None
)

DEPRECATED.

filepaths List of absolute paths to image files.
labels Class labels of every observation.
max_queue_size

sample_weight

use_multiprocessing

workers

Methods

on_epoch_end

View source

on_epoch_end()

Method called at the end of every epoch.

reset

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reset()

set_processing_attrs

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set_processing_attrs(
    image_data_generator,
    target_size,
    color_mode,
    data_format,
    save_to_dir,
    save_prefix,
    save_format,
    subset,
    interpolation,
    keep_aspect_ratio
)

Sets attributes to use later for processing files into a batch.

Args
image_data_generator Instance of ImageDataGenerator to use for random transformations and normalization.
target_size tuple of integers, dimensions to resize input images to.
color_mode One of "rgb", "rgba", "grayscale". Color mode to read images.
data_format String, one of channels_first, channels_last.
save_to_dir Optional directory where to save the pictures being yielded, in a viewable format. This is useful for visualizing the random transformations being applied, for debugging purposes.
save_prefix String prefix to use for saving sample images (if save_to_dir is set).
save_format Format to use for saving sample images (if save_to_dir is set).
subset Subset of data ("training" or "validation") if validation_split is set in ImageDataGenerator.
interpolation Interpolation method used to resample the image if the target size is different from that of the loaded image. Supported methods are "nearest", "bilinear", and "bicubic". If PIL version 1.1.3 or newer is installed, "lanczos" is also supported. If PIL version 3.4.0 or newer is installed, "box" and "hamming" are also supported. By default, "nearest" is used.
keep_aspect_ratio Boolean, whether to resize images to a target size without aspect ratio distortion. The image is cropped in the center with target aspect ratio before resizing.

__getitem__

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__getitem__(
    idx
)

Gets batch at position index.

Args
index position of the batch in the PyDataset.

Returns
A batch

__iter__

View source

__iter__()

Create a generator that iterate over the PyDataset.

__len__

View source

__len__()

Number of batch in the PyDataset.

Returns
The number of batches in the PyDataset.

allowed_class_modes 

{
 'binary',
 'categorical',
 'input',
 'sparse',
 None
}

white_list_formats ('png', 'jpg', 'jpeg', 'bmp', 'ppm', 'tif', 'tiff')