AI生成动画2D精灵的方法可以采用神经网络生成器,如GAN(生成对抗网络)。以下是一个简单的Python示例代码,使用GAN生成器来生成动画精灵图像:
1.首先,导入必要的库:
import tensorflow as tf import numpy as np
2.定义生成器:
def generator(z): with tf.variable_scope("generator"): h1 = tf.layers.dense(z, 128, activation=tf.nn.leaky_relu) logits = tf.layers.dense(h1, 784) out = tf.tanh(logits) return out
3.定义判别器:
def discriminator(x, reuse=False): with tf.variable_scope("discriminator"): if reuse: tf.get_variable_scope().reuse_variables()
h1 = tf.layers.dense(x, 128, activation=tf.nn.leaky_relu)
logits = tf.layers.dense(h1, 1)
out = tf.sigmoid(logits)
return out, logits
4.定义损失函数和优化器:
z = tf.placeholder(tf.float32, shape=[None, 100]) x = tf.placeholder(tf.float32, shape=[None, 784])
G = generator(z) D_real, D_real_logits = discriminator(x) D_fake, D_fake_logits = discriminator(G, reuse=True)
d_loss_real = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(logits=D_real_logits, labels=tf.ones_like(D_real))) d_loss_fake = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(logits=D_fake_logits, labels=tf.zeros_like(D_fake))) d_loss = d_loss_real + d_loss_fake
g_loss = tf.reduce_mean(tf.nn.sigmoid_cross_entropy_with_logits(logits=D_fake_logits, labels=tf.ones_like(D_fake)))
t_vars = tf.trainable_variables() d_vars = [var for var in t_vars if 'discriminator' in var.name] g_vars = [var for var in t_vars if 'generator' in var.name]
d_train_opt = tf.train.AdamOptimizer(0.0002).minimize(d_loss, var_list=d_vars) g_train_opt = tf.train.AdamOptimizer(0.0002).minimize(g_loss, var_list=g_vars)
5.读取数据集(如MNIST):
from tensorflow.examples.tutorials.mnist import input_data mnist = input_data.read_data_sets('MNIST_data')
6.训练模型:
batch_size = 100 epochs = 100 samples = []
with tf.Session() as sess: sess.run(tf.global_variables_initializer())
for epoch in range(epochs):
for ii in range(mnist.train.num_examples//batch_size):
batch = mnist.train.next_batch(batch_size
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