是的,我搜索了SO,Reddit,GitHub,Google Plus等等。我在Windows 10 64位上運行TensorFlow,運行Python 3。我的目標是閱讀一堆圖像併爲他們分配標籤進行培訓。TensorFlow:如何在創建批次時將標籤分配給圖像數據集?
我想把我的標籤列表變成一個可用的「對象」sess.run(train_step, feed_dict={imgs:batchX,lbls:batchY})
。我的圖像導入正常,因爲在此之前我稱這個函數爲創建批次(下面的代碼)。在函數中,我可以成功創建圖像numpy數組。但是,我不知道從哪裏開始分配我的標籤。
我labels.txt文件的格式爲
data/cats/cat (1) copy.png,1
data/cats/cat (2) copy.png,1
data/cats/cat (3) copy.png,1
and so on for about 300 lines
哪裏data/cats/cat (x) copy.png
是文件和1
是類(在這種情況下,貓)。該文件被讀入一個名爲labels_list
的常規數組(或列表?),每行都是數組中的一個新元素。當我打印labels_list
,它顯示
['data/cats/cat (1) copy.png,1' 'data/cats/cat (2) copy.png,1'
'data/cats/cat (3) copy.png,1' 'data/cats/cat (4) copy.png,1'
'data/cats/cat (5) copy.png,1' 'data/cats/cat (6) copy.png,1'
(alot more lines of this)
'data/cats/cat (295) copy.png,1' 'data/cats/cat (296) copy.png,1'
'data/cats/cat (297) copy.png,1' 'data/cats/cat (298) copy.png,1']
我不知道如何讓我的train_step(下面的代碼)可用numpy的陣列。我試過Google搜索,但大多數解決方案只使用整數標籤列表,但我需要使用文件的路徑。
讚賞任何幫助,謝謝:)
代碼:(和我的GitHub github.com/supamonkey2000/jm-uofa)
import tensorflow as tf
import numpy as np
import os
import sys
import cv2
content = [] # Where images are stored
labels_list = [] # Stores the image labels, still not 100% working
########## File opening function
with open("data/cats/files.txt") as ff:
for line in ff:
line = line.rstrip()
content.append(line)
#################################
########## Labels opening function
with open("data/cats/labels.txt") as fff:
for linee in fff:
linee = linee.rstrip()
labels_list.append(linee)
labels_list = np.array(labels_list)
###############################
############ Function used to create batches for training
def create_batches(batch_size):
images1 = [] # Array to hold images within the function
for img1 in content: # Read the images from content[] in a loop
thedata = cv2.imread(img1) # Load the image
thedata = thedata.flatten() # Convert the image to a usable numpy array
images1.append(thedata) # Append the image to the images1 array
images1 = np.array(images1) # Convert images1[] to numpy array
print(labels_list) # Debugging purposes
while(True):
for i in range(0,298,10):
yield(images1[i:i+batch_size],labels_list[i:i+batch_size])
#########################################################
imgs = tf.placeholder(dtype=tf.float32,shape=[None,786432]) # Images placeholder
lbls = tf.placeholder(dtype=tf.float32,shape=[None,10]) # Labels placeholder
W = tf.Variable(tf.zeros([786432,10])) # Weights
b = tf.Variable(tf.zeros([10])) # Biases
y_ = tf.nn.softmax(tf.matmul(imgs,W) + b) # Something complicated
cross_entropy = tf.reduce_mean(-tf.reduce_sum(lbls * tf.log(y_),reduction_indices=[1])) # Cool spacey sounding thing that does cool stuff
train_step = tf.train.GradientDescentOptimizer(0.05).minimize(cross_entropy) # When this is called use the GDO to train the model
sess = tf.InteractiveSession() # Setup the session
tf.global_variables_initializer().run() # Initialize the variables
############################## Training steps for teaching the model
for i in range(10000): # Run for 10,000 steps
for (batchX,batchY) in create_batches(10): # Call a batch to be used
sess.run(train_step, feed_dict={imgs:batchX, lbls: batchY}) # Train the model with the batch (THIS IS GIVING ME TONS OF ISSUES)
###################################################################
correct_prediction = tf.equal(tf.argmax(y_,1),tf.argmax(lbls,1)) # Find out if the program tested properly (I think?)
accuracy = tf.reduce_mean(tf.cast(correct_prediction,tf.float32)) # Find the accuracy of the model
print(sess.run(accuracy, feed_dict={imgs:content, lbls:labels_list})) # Print the accuracy of the model !!! imgs:content may be incorrect, must look into it
你能解釋爲什麼在訓練時需要文件路徑嗎?根據你的'correct_prediction'你使用一個熱門編碼,所以你的batchY應該是一個熱門的編碼值。 ps我對tensorflow比較陌生,但是我的網絡很相似,所以我會盡力幫助 –
嗯...我不知道爲什麼我需要路徑,因爲圖像已經加載了......我只需要分配該類(在這種情況下'1')的*數組*值?這可能沒有道理。我是否需要將labels.txt更改爲「0,1」,「1,1」等,而不是圖像數組?感謝回覆。 –
我有一個像你一樣的培訓文件,最後是標籤。我有一個單獨的labelfile,我根據培訓文件創建,其中包含每個唯一標籤映射到我的網絡的一個熱編碼輸入。例如labelfile:https:// www.imageupload.co.uk/images/2017/07/11/examplefile.png'。 列'A'是我的標籤,列'B:I'是我用作'batchY'的網絡標籤。 –