CNN网站验证码训练后重复预测异常

[xiefg]

使用tensorflow_cnn进行验证码训练并预测，图片预测成功率很高，但是图片验证码样本是根据目标网站自己用PHP模拟生成，几乎接近一致，训练后使用模型进行目标网站的登录，登录逻辑为了防止验证码失败，会有重试，login是个循环，失败了掉login，login里会读取验证码图片调用crack_captcha，当第一次验证准确时直接登录成功，当第一次验证失败，重新调用登录去再读取验证码图片进行预测时报异常，然后N次循环都报异常，而且每一次重试，会增加异常的数量，异常如下：
alert('验证码错误');
9006
2017-11-02 10:22:14.369586: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_11 not found in checkpoint
2017-11-02 10:22:14.369586: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_10 not found in checkpoint
2017-11-02 10:22:14.369586: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_12 not found in checkpoint
2017-11-02 10:22:14.371381: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_14 not found in checkpoint
2017-11-02 10:22:14.371404: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_15 not found in checkpoint
2017-11-02 10:22:14.371410: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_13 not found in checkpoint
2017-11-02 10:22:14.372782: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_17 not found in checkpoint
2017-11-02 10:22:14.372955: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_16 not found in checkpoint
2017-11-02 10:22:14.375048: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_18 not found in checkpoint
2017-11-02 10:22:14.375149: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_19 not found in checkpoint
2393
2017-11-02 10:22:15.583424: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_10 not found in checkpoint
2017-11-02 10:22:15.584296: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_11 not found in checkpoint
2017-11-02 10:22:15.584677: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_13 not found in checkpoint
2017-11-02 10:22:15.584754: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_12 not found in checkpoint
2017-11-02 10:22:15.585934: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_14 not found in checkpoint
2017-11-02 10:22:15.586106: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_16 not found in checkpoint
2017-11-02 10:22:15.586465: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_15 not found in checkpoint
2017-11-02 10:22:15.587122: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_17 not found in checkpoint
2017-11-02 10:22:15.587133: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_18 not found in checkpoint
2017-11-02 10:22:15.588150: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_19 not found in checkpoint
2017-11-02 10:22:15.588196: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_20 not found in checkpoint
2017-11-02 10:22:15.589135: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_21 not found in checkpoint
2017-11-02 10:22:15.589325: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_22 not found in checkpoint
2017-11-02 10:22:15.591827: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_23 not found in checkpoint

[xiefg]

重新写个测试更明显点

def test():
    captcha = Captcha()
    text, image = captcha.gen()
    image = convert2gray(image)
    image = image.flatten() / 255
    predict_text = captcha.crack_captcha(image)
    print("正确: {}  预测: {}".format(text, predict_text))
    time.sleep(1)
    test()

---

2017-11-02 14:34:54.950657: W tensorflow/core/platform/cpu_feature_guard.cc:45] The TensorFlow library wasn't compiled to use SSE4.2 instructions, but these are available on your machine and could speed up CPU computations.
2017-11-02 14:34:54.950681: W tensorflow/core/platform/cpu_feature_guard.cc:45] The TensorFlow library wasn't compiled to use AVX instructions, but these are available on your machine and could speed up CPU computations.
正确: 51170 预测: 51170
2017-11-02 14:34:56.887373: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_11 not found in checkpoint
2017-11-02 14:34:56.887503: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_10 not found in checkpoint
2017-11-02 14:34:56.889094: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_13 not found in checkpoint
2017-11-02 14:34:56.889150: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_12 not found in checkpoint
2017-11-02 14:34:56.890027: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_14 not found in checkpoint
2017-11-02 14:34:56.891680: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_15 not found in checkpoint
2017-11-02 14:34:56.891723: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_16 not found in checkpoint
2017-11-02 14:34:56.891904: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_19 not found in checkpoint
2017-11-02 14:34:56.894900: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_17 not found in checkpoint
2017-11-02 14:34:56.894900: W tensorflow/core/framework/op_kernel.cc:1152] Not found: Key Variable_18 not found in checkpoint
Traceback (most recent call last):
File "captcha.py", line 252, in
test()
File "captcha.py", line 248, in test
test()
File "captcha.py", line 244, in test
predict_text = captcha.crack_captcha(image) #导入模型识别
File "captcha.py", line 217, in crack_captcha
saver.restore(sess, tf.train.latest_checkpoint('.'))
File "/Library/Python/2.7/site-packages/tensorflow/python/training/saver.py", line 1457, in restore
{self.saver_def.filename_tensor_name: save_path})
File "/Library/Python/2.7/site-packages/tensorflow/python/client/session.py", line 778, in run
run_metadata_ptr)
File "/Library/Python/2.7/site-packages/tensorflow/python/client/session.py", line 982, in _run
feed_dict_string, options, run_metadata)
File "/Library/Python/2.7/site-packages/tensorflow/python/client/session.py", line 1032, in _do_run
target_list, options, run_metadata)
File "/Library/Python/2.7/site-packages/tensorflow/python/client/session.py", line 1052, in _do_call
raise type(e)(node_def, op, message)
tensorflow.python.framework.errors_impl.NotFoundError

[xiefg]

问题好像是：重试时不要重复定义CNN，即crack_captcha_cnn只执行一次复用即可解决

[1513]

你解决了吗？好像问题不在这

[1513]

我每次都是创建一个新的对象去处理，肯定是执行了一次

[xiefg]

@1513 crack_captcha_cnn只执行一次，如果在对象里就要处理成单例模式

[1513]

@xiefg 我已经解决了需要重置tf.reset_default_graph()，每次识别前需要进行这个操作，感谢您的回复，另外，要不要设置成单例，多线程下要不要同步处理，不清楚，我试过python多线程跑，好像没有问题

[SimonWang00]

@ 1513 ，重置tf.reset_default_graph（）代码会报错，你的重置放哪了？

[ResolveWang]

@1513 请问一下tf.reset_default_graph()这个函数放哪里啊，放预测代码中会报错

目前我的解决方案如 @xiefg 所说的，直接使用的单例