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import numpy as np | |
import cv2 | |
import os | |
import struct | |
def trans(image, label, save): | |
if 'train' in os.path.basename(image): | |
prefix = 'train' | |
else: | |
prefix = 'test' | |
labelIndex = 0 | |
imageIndex = 0 | |
i = 0 | |
lbdata = open(label, 'rb').read() | |
magic, nums = struct.unpack_from(">II", lbdata, labelIndex) | |
labelIndex += struct.calcsize('>II') | |
imgdata = open(image, "rb").read() | |
magic, nums, numRows, numColumns = struct.unpack_from('>IIII', imgdata, imageIndex) | |
imageIndex += struct.calcsize('>IIII') | |
for i in range(nums): | |
label = struct.unpack_from('>B', lbdata, labelIndex)[0] | |
labelIndex += struct.calcsize('>B') | |
im = struct.unpack_from('>784B', imgdata, imageIndex) | |
imageIndex += struct.calcsize('>784B') | |
im = np.array(im, dtype='uint8') | |
img = im.reshape(28, 28) | |
save_name = os.path.join(save, '{}_{}_{}.jpg'.format(prefix, i, label)) | |
cv2.imwrite(save_name, img) | |
if __name__ == '__main__': | |
path = './origin_data' | |
train_images = f'{path}/train-images-idx3-ubyte' | |
train_labels = f'{path}/train-labels-idx1-ubyte' | |
test_images =f'{path}/t10k-images-idx3-ubyte' | |
test_labels = f'{path}/t10k-labels-idx1-ubyte' | |
save_train =f'{path}/MNIST_data/train_images/' | |
save_test =f'{path}/MNIST_data/test_images/' | |
if not os.path.exists(save_train): | |
os.makedirs(save_train) | |
if not os.path.exists(save_test): | |
os.makedirs(save_test) | |
trans(test_images, test_labels, save_test) | |
trans(train_images, train_labels, save_train) |