#! /usr/bin/python
# -*- coding: utf-8 -*-
import os
import numpy as np
from tensorlayerx import logging
from tensorlayerx.vision import load_images
from tensorlayerx.files.utils import (del_file, folder_exists, load_file_list, maybe_download_and_extract)
logging.set_verbosity(logging.INFO)
__all__ = ['load_cyclegan_dataset']
[docs]def load_cyclegan_dataset(filename='summer2winter_yosemite', path='data'):
"""Load images from CycleGAN's database, see `this link <https://people.eecs.berkeley.edu/~taesung_park/CycleGAN/datasets/>`__.
Parameters
------------
filename : str
The dataset you want, see `this link <https://people.eecs.berkeley.edu/~taesung_park/CycleGAN/datasets/>`__.
path : str
The path that the data is downloaded to, defaults is `data/cyclegan`
Examples
---------
>>> im_train_A, im_train_B, im_test_A, im_test_B = load_cyclegan_dataset(filename='summer2winter_yosemite')
"""
path = os.path.join(path, 'cyclegan')
url = 'https://people.eecs.berkeley.edu/~taesung_park/CycleGAN/datasets/'
logging.info("If can't download this dataset automatically, "
"please download it from the official website manually."
"cyclegan Dataset <https://people.eecs.berkeley.edu/~taesung_park/CycleGAN/datasets/>."
"Please place dataset under 'data/cyclegan/' by default.")
if folder_exists(os.path.join(path, filename)) is False:
logging.info("[*] {} is nonexistent in {}".format(filename, path))
maybe_download_and_extract(filename + '.zip', path, url, extract=True)
del_file(os.path.join(path, filename + '.zip'))
def load_image_from_folder(path):
return load_images(path=path, n_threads=10)
im_train_A = load_image_from_folder(os.path.join(path, filename, "trainA"))
im_train_B = load_image_from_folder(os.path.join(path, filename, "trainB"))
im_test_A = load_image_from_folder(os.path.join(path, filename, "testA"))
im_test_B = load_image_from_folder(os.path.join(path, filename, "testB"))
def if_2d_to_3d(images): # [h, w] --> [h, w, 3]
for i, _v in enumerate(images):
if len(images[i].shape) == 2:
images[i] = images[i][:, :, np.newaxis]
images[i] = np.tile(images[i], (1, 1, 3))
return images
im_train_A = if_2d_to_3d(im_train_A)
im_train_B = if_2d_to_3d(im_train_B)
im_test_A = if_2d_to_3d(im_test_A)
im_test_B = if_2d_to_3d(im_test_B)
return im_train_A, im_train_B, im_test_A, im_test_B