卷积、池化后的图像大小计算(附例子) | 您所在的位置:网站首页 › 卷积后大小计算 › 卷积、池化后的图像大小计算(附例子) |
用CNN网络进行图片处理,就会遇到卷积、池化后的图像大小问题,一般搜到的答案是这样的: 对于初学者,看到这个公式的唯一疑问是:P值到底是多少? 在Tensoflow中,Padding有2个选型,'SAME'和'VALID' ,下面举例说明差别: 如果 Padding='SAME',输出尺寸为: W / S import tensorflow as tf input_image = tf.layers.Input(shape=[32, 32, 3], dtype=tf.float32) conv0 = tf.layers.conv2d(input_image, 64, kernel_size=[3, 3], strides=[2, 2], padding='same') # 32/2=16 conv1 = tf.layers.conv2d(input_image, 64, kernel_size=[5, 5], strides=[2, 2], padding='same') # kernel_szie不影响输出尺寸 print(conv0) # shape=(?, 16, 16, 64) print(conv1) # shape=(?, 16, 16, 64)如果 Padding='VALID',输出尺寸为:(W - F + 1) / S import tensorflow as tf input_image = tf.layers.Input(shape=[32, 32, 3], dtype=tf.float32) conv0 = tf.layers.conv2d(input_image, 64, kernel_size=[3, 3], strides=[2, 2], padding='valid') # (32-3+1)/2=15 conv1 = tf.layers.conv2d(input_image, 64, kernel_size=[5, 5], strides=[2, 2], padding='valid') # (32-5+1)/2=14 print(conv0) # shape=shape=(?, 15, 15, 64) print(conv1) # shape=(?, 14, 14, 64) |
CopyRight 2018-2019 实验室设备网 版权所有 |