我目前正在尝试通过稍微更改MNIST for ML Beginners code来编写神经网络。我的影片举办这样一个CSV:如何使用CSV作为Tensorflow神经网络的输入数据?
Image_Name |Nevus? |Dysplastic Nevus?| Melanoma? asdfgjkgdsl.png |1 |0 |0
图像名,这是一个炎热的结果。每个图像都是1022 x 767,我也想用每个像素的颜色作为输入。因此,我将MNIST代码更改为2,351,622个输入(1022个像素宽* 767个像素高*每个像素3个颜色)和3个输出。
# from tensorflow.examples.tutorials.mnist import input_data
# mnist = input_data.read_data_sets("MNIST_data/", one_hot=True)
def main():
x = tf.placeholder(tf.float32, [None, 2351622])
W = tf.Variable(tf.zeroes([2351622, 3]))
b = tf.Variable(tf.zeroes([3]))
y = tf.nn.softmax(tf.matmul(x, W) + b)
y_ = tf.placeholder(tf.float32, [None, 3])
cross_entropy = tf.reduce_mean(-tf.reduce_sum(y_ * tf.log(y), reduction_indices=[1]))
train_step = tf.train.GradientDescentOptimizer(0.5).minimize(cross_entropy)
init = tf.initialize_all_variables()
sess = tf.Session()
sess.run(init)
for i in range(1000):
example, label = sess.run([features, col5])
# batch_xs, batch_ys = mnist.train.next_batch(100)
# sess.run(train_step, feed_dict={x: batch_xs, y_: batch_ys})
correct_prediction = tf.equal(tf.argmax(y,1), tf.argmax(y_,1))
accuracy = tf.reduce_mean(tf.cast(correct_prediction, tf.float32))
print(sess.run(accuracy, feed_dict={x: mnist.test.images, y_: mnist.test.labels}))
注释行是我必须替换才能将我的数据加载到神经网络中的行。以获得每个图像(我发现)的2.3M输入的最简单方法是:
from PIL import Image
import numpy as np
list(np.array(Image.open('asdfgjkgdsl.png')).ravel().flatten())
如何我可以加载这个数据集到tensorflow用于训练神经网络?