tf.metrics.accuracy ==>坑貨

tf.metrics.accuracy輸出兩個值,第一個值為上幾步的平均精度,第二值是上幾步與該步的精度的平均值.

   

正常的計算單個batch正確率的代碼

self.correct_prediction = tf.equal(self.labels,self.labels_pred )
self.accuracy = tf.reduce_mean(tf.cast(self.correct_prediction, tf.float32))