[英]Tensorflow confusion matrix for validation in retrain example
我一直在使用github tensorflow hub上的keep示例,在嘗試添加以下兩件事時遇到了兩個問題:
對於混淆矩陣,我將運行評估功能更改為以下內容
def run_final_eval(train_session, module_spec, class_count, image_lists,
jpeg_data_tensor, decoded_image_tensor,
resized_image_tensor, bottleneck_tensor):
#Runs a final evaluation on an eval graph using the test data set.
Args:
train_session: Session for the train graph with the tensors below.
module_spec: The hub.ModuleSpec for the image module being used.
class_count: Number of classes
image_lists: OrderedDict of training images for each label.
jpeg_data_tensor: The layer to feed jpeg image data into.
decoded_image_tensor: The output of decoding and resizing the image.
resized_image_tensor: The input node of the recognition graph.
bottleneck_tensor: The bottleneck output layer of the CNN graph.
test_bottlenecks, test_ground_truth, test_filenames = (
get_random_cached_bottlenecks(train_session, image_lists,
FLAGS.test_batch_size,
'testing', FLAGS.bottleneck_dir,
FLAGS.image_dir, jpeg_data_tensor,
decoded_image_tensor, resized_image_tensor,
bottleneck_tensor, FLAGS.tfhub_module))
(eval_session, _, bottleneck_input, ground_truth_input, evaluation_step,
prediction) = build_eval_session(module_spec, class_count)
test_accuracy, predictions = eval_session.run(
[evaluation_step, prediction],
feed_dict={
bottleneck_input: test_bottlenecks,
ground_truth_input: test_ground_truth
})
tf.logging.info('Final test accuracy = %.1f%% (N=%d)' %
(test_accuracy * 100, len(test_bottlenecks)))
confusion = tf.confusion_matrix(labels=test_ground_truth, predictions=predictions,num_classes=class_count)
print(confusion)
if FLAGS.print_misclassified_test_images:
tf.logging.info('=== MISCLASSIFIED TEST IMAGES ===')
for i, test_filename in enumerate(test_filenames):
if predictions[i] != test_ground_truth[i]:
tf.logging.info('%70s %s' % (test_filename,
list(image_lists.keys())[predictions[i]]))
輸出為:
INFO:tensorflow:Final test accuracy = 88.5% (N=710)
INFO:tensorflow:=== CONwaka ===
Tensor("confusion_matrix/SparseTensorDenseAdd:0", shape=(5, 5), dtype=int32)
我也嘗試使用tf.logging.info獲得相同的結果。 我想以數組形式打印出來。 我找到了MLninja的《答案》,這似乎也是一個更好的解決方案,但我不知道如何在重新訓練文件中實現它。
任何幫助都非常感謝!
您需要評估混淆矩陣張量。 現在,您將混淆矩陣運算添加到圖形並打印該運算,但是您要打印的是矩陣運算結果。 在代碼中,它看起來像這樣:
confusion_matrix_np = eval_session.run(
confusion,
feed_dict={
bottleneck_input: test_bottlenecks,
ground_truth_input: test_ground_truth
})
print(confusion_matrix_np)
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