python - 使用 tflearn 构建 CNN

Question

我正在尝试使用以下代码使用 tflearn 构建 CNN

train_images, train_labels, test_images, test_labels = load_dataset()
convnet = input_data(shape=[None, 28, 28, 1], name='input')
convnet = conv_2d(convnet, 32, 2, activation='relu')
convnet = max_pool_2d(convnet, 2)
convnet = conv_2d(convnet, 64, 2, activation='relu')
convnet = max_pool_2d(convnet, 2)
convnet = fully_connected(convnet, 1024, activation='relu')
convnet = dropout(convnet, 0.8)
convnet = fully_connected(convnet, 24, activation='softmax')
convnet = regression(convnet, optimizer='adam', learning_rate=0.01, loss='categorical_crossentropy')

model = tflearn.DNN(convnet)
model.fit(train_images, train_labels, n_epoch=30,
          validation_set=(test_images,  test_labels),
          snapshot_step=500, show_metric=True, run_id='characterOCR')
model.save('CNN.model')

数据集被 reshape 为以下形状

def load_mnist_images(filename):
    with gzip.open(filename, 'rb') as f:
        data = np.frombuffer(f.read(), np.uint8, offset=16)
        data = data.reshape(-1, 28, 28, 1)
        return data

这是我的数据集，但我是基于 MNIST 结构构建的，现在出现以下错误:

Traceback (most recent call last):
  File "/home/hassan/JPG-PNG-to-MNIST-NN-Format/CNN_network.py", line 56, in <module>
    snapshot_step=500, show_metric=True, run_id='characterOCR')
  File "/home/hassan/anaconda3/envs/object-detection/lib/python3.7/site-packages/tflearn/models/dnn.py", line 216, in fit
    callbacks=callbacks)
  File "/home/hassan/anaconda3/envs/object-detection/lib/python3.7/site-packages/tflearn/helpers/trainer.py", line 339, in fit
    show_metric)
  File "/home/hassan/anaconda3/envs/object-detection/lib/python3.7/site-packages/tflearn/helpers/trainer.py", line 818, in _train
    feed_batch)
  File "/home/hassan/anaconda3/envs/object-detection/lib/python3.7/site-packages/tensorflow/python/client/session.py", line 950, in run
    run_metadata_ptr)
  File "/home/hassan/anaconda3/envs/object-detection/lib/python3.7/site-packages/tensorflow/python/client/session.py", line 1149, in _run
    str(subfeed_t.get_shape())))
ValueError: Cannot feed value of shape (64,) for Tensor 'TargetsData/Y:0', which has shape '(?, 24)'

有没有人有解决办法？

Answer 1

对于 tflearn 我没有解决所有问题 我所知道的错误来自于我向完全连接的层形状 24 提供形状为 64 的数据 我不知道在哪里这64来自

但我从 tflearn 切换到 Keras API，现在它可以工作了

如果有人想知道源码请告诉我