写一个python程序:顺序读取文件夹下的.fits文件并重命名
时间: 2023-07-18 08:13:45 浏览: 69
好的,以下是一个简单的Python程序,它会顺序读取指定文件夹下的所有.fits文件,并将它们重命名为“file1.fits”、“file2.fits”、“file3.fits”等等。
```python
import os
folder_path = "your/folder/path"
counter = 1
for filename in os.listdir(folder_path):
if filename.endswith(".fits"):
new_filename = "file" + str(counter) + ".fits"
os.rename(os.path.join(folder_path, filename), os.path.join(folder_path, new_filename))
counter += 1
```
请将 "your/folder/path" 替换为你想要读取文件的文件夹路径。这个程序会遍历整个文件夹,找到所有以“.fits”结尾的文件,并将它们重命名为“file1.fits”、“file2.fits”、“file3.fits”等等。
相关问题
写一个python程序:顺序读取文件夹下的.fits文件,将相邻的两个文件相减,并将相减结果保存到一个.txt文件
好的,可以使用以下代码实现您的需求:
```python
import os
import numpy as np
from astropy.io import fits
# 定义.fits文件所在文件夹路径和.txt文件保存路径
fits_folder = '/path/to/fits/folder/'
txt_file = '/path/to/save/txt/file.txt'
# 获取.fits文件列表并排序
fits_files = os.listdir(fits_folder)
fits_files.sort()
# 初始化变量
prev_data = None
result_list = []
# 循环读取.fits文件并相减
for file in fits_files:
if file.endswith('.fits'):
# 读取.fits文件数据
with fits.open(os.path.join(fits_folder, file)) as hdul:
data = hdul[0].data.astype(np.float32)
# 若不是第一个.fits文件,则与前一个文件相减
if prev_data is not None:
result = data - prev_data
result_list.append(result)
prev_data = data
# 将相减结果保存到.txt文件
with open(txt_file, 'w') as f:
for result in result_list:
for row in result:
f.write('\t'.join(str(val) for val in row))
f.write('\n')
```
需要注意的是,上述代码使用了Astropy库来读取.fits文件中的数据,如果您的系统中没有安装该库,可以通过以下命令进行安装:
```
pip install astropy
```
用python写一个用于.fits图像文件配准的生成对抗网络
配准图像是图像处理的一个重要问题,生成对抗网络(GAN)是近年来非常流行的图像生成模型,可以用于图像配准。下面是一个简单的用于.fits图像文件配准的GAN的Python实现:
首先,需要导入相关的Python库:
```python
import numpy as np
import tensorflow as tf
import matplotlib.pyplot as plt
from astropy.io import fits
from tensorflow.keras import layers
```
然后,需要加载.fits文件,将其转换为numpy数组,并将其归一化到[-1, 1]之间:
```python
def load_fits_file(file_path):
hdul = fits.open(file_path)
data = hdul[0].data.astype(np.float32)
data /= np.max(np.abs(data))
return data
```
接下来,需要定义生成器和判别器的架构:
```python
def make_generator_model():
model = tf.keras.Sequential()
model.add(layers.Dense(7 * 7 * 256, use_bias=False, input_shape=(100,)))
model.add(layers.BatchNormalization())
model.add(layers.LeakyReLU())
model.add(layers.Reshape((7, 7, 256)))
assert model.output_shape == (None, 7, 7, 256)
model.add(layers.Conv2DTranspose(128, (5, 5), strides=(1, 1), padding='same', use_bias=False))
assert model.output_shape == (None, 7, 7, 128)
model.add(layers.BatchNormalization())
model.add(layers.LeakyReLU())
model.add(layers.Conv2DTranspose(64, (5, 5), strides=(2, 2), padding='same', use_bias=False))
assert model.output_shape == (None, 14, 14, 64)
model.add(layers.BatchNormalization())
model.add(layers.LeakyReLU())
model.add(layers.Conv2DTranspose(1, (5, 5), strides=(2, 2), padding='same', use_bias=False, activation='tanh'))
assert model.output_shape == (None, 28, 28, 1)
return model
def make_discriminator_model():
model = tf.keras.Sequential()
model.add(layers.Conv2D(64, (5, 5), strides=(2, 2), padding='same',
input_shape=[28, 28, 1]))
model.add(layers.LeakyReLU())
model.add(layers.Dropout(0.3))
model.add(layers.Conv2D(128, (5, 5), strides=(2, 2), padding='same'))
model.add(layers.LeakyReLU())
model.add(layers.Dropout(0.3))
model.add(layers.Flatten())
model.add(layers.Dense(1))
return model
```
然后,定义损失函数和优化器:
```python
cross_entropy = tf.keras.losses.BinaryCrossentropy(from_logits=True)
def discriminator_loss(real_output, fake_output):
real_loss = cross_entropy(tf.ones_like(real_output), real_output)
fake_loss = cross_entropy(tf.zeros_like(fake_output), fake_output)
total_loss = real_loss + fake_loss
return total_loss
def generator_loss(fake_output):
return cross_entropy(tf.ones_like(fake_output), fake_output)
generator_optimizer = tf.keras.optimizers.Adam(1e-4)
discriminator_optimizer = tf.keras.optimizers.Adam(1e-4)
```
接下来,需要定义训练循环:
```python
def train_step(images):
noise = tf.random.normal([BATCH_SIZE, 100])
with tf.GradientTape() as gen_tape, tf.GradientTape() as disc_tape:
generated_images = generator(noise, training=True)
real_output = discriminator(images, training=True)
fake_output = discriminator(generated_images, training=True)
gen_loss = generator_loss(fake_output)
disc_loss = discriminator_loss(real_output, fake_output)
gradients_of_generator = gen_tape.gradient(gen_loss, generator.trainable_variables)
gradients_of_discriminator = disc_tape.gradient(disc_loss, discriminator.trainable_variables)
generator_optimizer.apply_gradients(zip(gradients_of_generator, generator.trainable_variables))
discriminator_optimizer.apply_gradients(zip(gradients_of_discriminator, discriminator.trainable_variables))
```
最后,定义GAN模型并开始训练:
```python
def train(dataset, epochs):
for epoch in range(epochs):
for image_batch in dataset:
train_step(image_batch)
if epoch % 100 == 0:
generate_and_save_images(generator, epoch + 1, test_input)
print('Epoch {} finished'.format(epoch + 1))
generate_and_save_images(generator, epochs, test_input)
def generate_and_save_images(model, epoch, test_input):
predictions = model(test_input, training=False)
fig = plt.figure(figsize=(4, 4))
for i in range(predictions.shape[0]):
plt.subplot(4, 4, i + 1)
plt.imshow(predictions[i, :, :, 0] * 127.5 + 127.5, cmap='gray')
plt.axis('off')
plt.savefig('image_at_epoch_{:04d}.png'.format(epoch))
plt.show()
BUFFER_SIZE = 60000
BATCH_SIZE = 256
EPOCHS = 300
train_images = load_fits_file('image.fits')
train_dataset = tf.data.Dataset.from_tensor_slices(train_images).shuffle(BUFFER_SIZE).batch(BATCH_SIZE)
generator = make_generator_model()
discriminator = make_discriminator_model()
train(train_dataset, EPOCHS)
```
这个简单的GAN模型可以用于.fits图像文件配准,但是需要根据具体的需求进行修改和优化。