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TF slice_input_producer不使张量保持同步

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TF slice_input_producer不使张量保持同步

这是一个完整的可运行示例,它重现了该问题:

import tensorflow as tftruth_filenames_np = ['dir/%d.jpg' % j for j in range(66)]truth_filenames_tf = tf.convert_to_tensor(truth_filenames_np)# get the labelslabels = [f.rsplit("/", 1)[1] for f in truth_filenames_np]labels_tf = tf.convert_to_tensor(labels)# My list is also already shuffled, so I set shuffle=Falsetruth_image_name, truth_label = tf.train.slice_input_producer(    [truth_filenames_tf, labels_tf], shuffle=False)# # Another key step, where I batch them together# truth_images_batch, truth_label_batch = tf.train.batch(#     [truth_image_name, truth_label], batch_size=11)epochs = 7with tf.Session() as sess:    sess.run(tf.global_variables_initializer())    coord = tf.train.Coordinator()    threads = tf.train.start_queue_runners(coord=coord)    for i in range(epochs):        print("Epoch ", i)        X_truth_batch = truth_image_name.eval()        X_label_batch = truth_label.eval()        # Here I display all the images in this batch, and then I check        # which file numbers they actually are.        # BUT, the images that are displayed don't correspond with what is        # printed by X_label_batch!        print(X_truth_batch)        print(X_label_batch)    coord.request_stop()    coord.join(threads)

打印的内容是:

Epoch  0b'dir/0.jpg'b'1.jpg'Epoch  1b'dir/2.jpg'b'3.jpg'Epoch  2b'dir/4.jpg'b'5.jpg'Epoch  3b'dir/6.jpg'b'7.jpg'Epoch  4b'dir/8.jpg'b'9.jpg'Epoch  5b'dir/10.jpg'b'11.jpg'Epoch  6b'dir/12.jpg'b'13.jpg'

因此,基本上每个eval调用都会再次运行该操作!添加批处理对此没有任何影响-只是打印批处理(前11个文件名,后11个标签,依此类推)

我看到的解决方法是:

for i in range(epochs):    print("Epoch ", i)    pair = tf.convert_to_tensor([truth_image_name, truth_label]).eval()    print(pair[0])    print(pair[1])

正确打印:

Epoch  0b'dir/0.jpg'b'0.jpg'Epoch  1b'dir/1.jpg'b'1.jpg'# ...

但对于违反最不惊奇原则的行为却无能为力。

编辑 :另一种方法:

import tensorflow as tftruth_filenames_np = ['dir/%d.jpg' % j for j in range(66)]truth_filenames_tf = tf.convert_to_tensor(truth_filenames_np)labels = [f.rsplit("/", 1)[1] for f in truth_filenames_np]labels_tf = tf.convert_to_tensor(labels)truth_image_name, truth_label = tf.train.slice_input_producer(    [truth_filenames_tf, labels_tf], shuffle=False)epochs = 7with tf.Session() as sess:    sess.run(tf.global_variables_initializer())    tf.train.start_queue_runners(sess=sess)    for i in range(epochs):        print("Epoch ", i)        X_truth_batch, X_label_batch = sess.run( [truth_image_name, truth_label])        print(X_truth_batch)        print(X_label_batch)

这是一个更好的方法,因为

tf.convert_to_tensor
并且co只接受相同类型/形状等的张量。

请注意,为简单起见,我删除了协调器,但是会导致警告:

W c: tf_jenkins home workspace release-win device cpu os
windows tensorflow core kernels queue_base.cc:294] _0_input_producer
/ input_producer / fraction_of_32_full / fraction_of_32_full:跳过未关闭队列的取消入队尝试

看到这个



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