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CIFAR_input.py
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import os
import cPickle
import numpy as np
def unpickle(file):
fo = open(file, 'rb')
dict = cPickle.load(fo)
fo.close()
return dict
def read_CIFAR10(data_folder):
""" Reads and parses examples from CIFAR10 data files """
# Constants describing the CIFAR-10 data set.
img_height = 32
img_width = 32
num_class = 10
num_channel = 3
num_val_img = 5000
train_img = []
train_label = []
test_img = []
test_label = []
train_file_list = ['data_batch_1', 'data_batch_2',
'data_batch_3', 'data_batch_4', 'data_batch_5']
test_file_list = ['test_batch']
for i in xrange(len(train_file_list)):
tmp_dict = unpickle(os.path.join(data_folder, train_file_list[i]))
train_img.append(tmp_dict['data'])
train_label.append(tmp_dict['labels'])
tmp_dict = unpickle(os.path.join(data_folder, test_file_list[0]))
test_img.append(tmp_dict['data'])
test_label.append(tmp_dict['labels'])
train_img = np.concatenate(train_img)
train_label = np.concatenate(train_label)
test_img = np.concatenate(test_img)
test_label = np.concatenate(test_label)
train_img = np.reshape(train_img, [-1, num_channel, img_height, img_width])
test_img = np.reshape(test_img, [-1, num_channel, img_height, img_width])
# change format from [B, C, H, W] to [B, H, W, C] for feeding to Tensorflow
train_img = np.transpose(train_img, [0, 2, 3, 1])
test_img = np.transpose(test_img, [0, 2, 3, 1])
mean_img = np.mean(np.concatenate([train_img, test_img]), axis=0)
# random split for train/val
num_train_img = train_img.shape[0] - num_val_img
idx_rand = np.random.permutation(train_img.shape[0])
train_img_new = train_img[idx_rand[:num_train_img], :, :, :]
val_img = train_img[idx_rand[num_train_img:], :, :, :]
train_label_new = train_label[idx_rand[:num_train_img]]
val_label = train_label[idx_rand[num_train_img:]]
CIFAR10_data = {}
CIFAR10_data['train_img'] = train_img_new
CIFAR10_data['val_img'] = val_img
CIFAR10_data['test_img'] = test_img
CIFAR10_data['train_label'] = train_label_new
CIFAR10_data['val_label'] = val_label
CIFAR10_data['test_label'] = test_label
CIFAR10_data['mean_img'] = mean_img
return CIFAR10_data
def read_CIFAR100(data_folder):
""" Reads and parses examples from CIFAR100 python data files """
# Constants describing the CIFAR-100 data set.
img_height = 32
img_width = 32
num_class = 100
num_channel = 3
num_val_img = 5000
train_img = []
train_label = []
test_img = []
test_label = []
train_file_list = ['train']
test_file_list = ['test']
tmp_dict = unpickle(os.path.join(data_folder, train_file_list[0]))
train_img.append(tmp_dict['data'])
train_label.append(tmp_dict['fine_labels'])
tmp_dict = unpickle(os.path.join(data_folder, test_file_list[0]))
test_img.append(tmp_dict['data'])
test_label.append(tmp_dict['fine_labels'])
train_img = np.concatenate(train_img)
train_label = np.concatenate(train_label)
test_img = np.concatenate(test_img)
test_label = np.concatenate(test_label)
train_img = np.reshape(train_img, [-1, num_channel, img_height, img_width])
test_img = np.reshape(test_img, [-1, num_channel, img_height, img_width])
# change format from [B, C, H, W] to [B, H, W, C] for feeding to Tensorflow
train_img = np.transpose(train_img, [0, 2, 3, 1])
test_img = np.transpose(test_img, [0, 2, 3, 1])
mean_img = np.mean(np.concatenate([train_img, test_img]), axis=0)
# random split for train/val
num_train_img = train_img.shape[0] - num_val_img
idx_rand = np.random.permutation(train_img.shape[0])
train_img_new = train_img[idx_rand[:num_train_img], :, :, :]
val_img = train_img[idx_rand[num_train_img:], :, :, :]
train_label_new = train_label[idx_rand[:num_train_img]]
val_label = train_label[idx_rand[num_train_img:]]
CIFAR100_data = {}
CIFAR100_data['train_img'] = train_img_new
CIFAR100_data['val_img'] = val_img
CIFAR100_data['test_img'] = test_img
CIFAR100_data['train_label'] = train_label_new
CIFAR100_data['val_label'] = val_label
CIFAR100_data['test_label'] = test_label
CIFAR100_data['mean_img'] = mean_img
return CIFAR100_data