如何在x_train, x_validate, y_train, y_validate = train_test_split(x_train, y_train, test_size = 0.1, random_state = 999) # Reshape image in 3 dimensions (height = 100, width = 125 , canal = 3) x_train = x_train.reshape(x_train.shape[0], *(224, 224, 3)) x_test = x_test.reshape(x_test.shape[0], *(224, 224, 3)) x_validate = x_validate.reshape(x_validate.shape[0], *(224, 224, 3))这一段代码基础上改进用Pillow库的Image.resize()方法来调整输入图像到合适大小
时间: 2023-12-24 12:24:21 浏览: 31
如果你想在train_test_split()之后使用Pillow库的Image.resize()方法来调整输入图像大小,可以按照以下步骤进行操作:
1.导入Pillow库:`from PIL import Image`
2.将x_train和x_validate中的每个图像使用Image.open()方法打开,并调用resize()方法来调整图像大小。例如,你可以使用以下代码来将每个图像的大小调整为(224, 224):
```
for i in range(len(x_train)):
img = Image.fromarray(x_train[i])
img = img.resize((224, 224))
x_train[i] = np.array(img)
for i in range(len(x_validate)):
img = Image.fromarray(x_validate[i])
img = img.resize((224, 224))
x_validate[i] = np.array(img)
```
其中,x_train和x_validate是包含图像的numpy数组。在此示例中,我们将每个图像调整为(224, 224)大小,并将其存储回相应的numpy数组中。
3.将x_train和x_validate的形状(shape)重新调整为(样本数, 高度, 宽度, 通道数)的形式。例如,你可以使用以下代码来调整形状:
```
x_train = x_train.reshape(x_train.shape[0], 224, 224, 3)
x_validate = x_validate.reshape(x_validate.shape[0], 224, 224, 3)
```
4.保存调整后的图像,如果需要的话。
完整的代码示例:
```
from PIL import Image
import numpy as np
from sklearn.model_selection import train_test_split
# Load the dataset
# ...
# Split the dataset
x_train, x_test, y_train, y_test = train_test_split(x, y, test_size=0.2, random_state=42)
x_train, x_validate, y_train, y_validate = train_test_split(x_train, y_train, test_size=0.1, random_state=999)
# Resize images
for i in range(len(x_train)):
img = Image.fromarray(x_train[i])
img = img.resize((224, 224))
x_train[i] = np.array(img)
for i in range(len(x_validate)):
img = Image.fromarray(x_validate[i])
img = img.resize((224, 224))
x_validate[i] = np.array(img)
# Reshape images
x_train = x_train.reshape(x_train.shape[0], 224, 224, 3)
x_validate = x_validate.reshape(x_validate.shape[0], 224, 224, 3)
# Save resized images, if needed
# ...
```
请注意,使用resize()方法调整图像大小可能会导致图像失真或模糊。为了避免这种情况,您可以使用其他调整大小的算法,例如Image.ANTIALIAS算法。例如:
```
img = img.resize((224, 224), Image.ANTIALIAS)
```
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