keras載入MNIST資料集方法
阿新 • • 發佈:2018-12-11
由於公司網路限制,因此使用keras自帶的MNIST資料集載入方法
(x_train, y_train),(x_test, y_test) = mnist.load_data()
是不可行的,所以只能另闢蹊徑。
第一種方法:
import gzip import keras from six.moves import cPickle from keras import backend as K img_rows, img_cols = 28, 28 def load_data(): path =r'/root/keras/keras/datasets/mnist.pkl.gz' ifpath.endswith('.gz'): f =gzip.open(path, 'rb') else: f =gzip.open(path, 'rb') f =gzip.open(path, 'rb') data =cPickle.load(f) f.close() return data print (len(load_data())) (x_train, y_train), (x_validation, y_validation),(x_test, y_test) = load_data() if K.image_data_format() == 'channels_first': x_train =x_train.reshape(x_train.shape[0], 1, img_rows, img_cols) x_test =x_test.reshape(x_test.shape[0], 1, img_rows, img_cols) input_shape= (1, img_rows, img_cols) else: x_train =x_train.reshape(x_train.shape[0], img_rows, img_cols, 1) x_test =x_test.reshape(x_test.shape[0], img_rows, img_cols, 1) input_shape= (img_rows, img_cols, 1) x_train = x_train.astype('float32') x_test = x_test.astype('float32') x_train /= 255 x_test /= 255 y_train = keras.utils.to_categorical(y_train, num_classes) y_test = keras.utils.to_categorical(y_test, num_classes)
第二種
from tensorflow.examples.tutorials.mnist import input_data mnist = input_data.read_data_sets("MNIST_data/", one_hot=True) x_train, y_train = mnist.train.images,mnist.train.labels x_test, y_test = mnist.test.images, mnist.test.labels x_train = x_train.reshape(-1, 28, 28,1).astype('float32') x_test = x_test.reshape(-1,28, 28,1).astype('float32')
備註:
目錄 MNIST_data/ 下為四個檔案t 10k-images.idx3-ubyte,t10k-labels.idx1-ubyte,train-images.idx3-ubyte,train-labels.idx1-ubyte
資料下載地址:
https://download.csdn.net/download/shaozhulei555/10829128 或
連結:https://pan.baidu.com/s/1gCHutXzpu6OaDbxbIs04Zw 密碼:fhfa