如何在使用skimage.transform.rotate时为外部像素创建蒙版

from skimage import transform
import numpy as np

def create_mask(image, angle):
    # 获取图像的形状
    height, width = image.shape[:2]
    
    # 计算旋转后的图像的形状
    diagonal = np.sqrt(height**2 + width**2)
    rotated_height = int(diagonal)
    rotated_width = int(diagonal)
    
    # 创建旋转后的图像
    rotated_image = transform.rotate(image, angle, resize=True, cval=0)
    
    # 创建蒙版
    mask = np.zeros((rotated_height, rotated_width), dtype=np.bool)
    mask[:height, :width] = True
    
    return mask

def apply_mask(image, mask):
    # 将图像应用到蒙版上
    masked_image = np.zeros_like(image)
    masked_image[mask] = image[mask]
    
    return masked_image

# 读取图像
image = skimage.io.imread('image.jpg')

# 创建蒙版
mask = create_mask(image, angle)

# 应用蒙版
masked_image = apply_mask(image, mask)