PIL仅保存第一个图像

Question

我正在尝试执行一些批处理图像处理，但在创建后一次保存图像时遇到问题。这里是所有的代码：

import Image 
import os 
import random 

training_images = [] 
training_path = 'cropped' 
background_images = [] 
background_path = 'background' 
training_file = 'train' 

def get_image_list(file_path): 
    return os.listdir(file_path) 

def rotate_randomely(im): 
    number = random.randint(1, 6) 
    if number == 1: 
     return im.transpose(Image.FLIP_LEFT_RIGHT) 
    elif number == 2: 
     return im.transpose(Image.FLIP_TOP_BOTTOM) 
    elif number == 3: 
     return im.transpose(Image.ROTATE_90) 
    elif number == 4: 
     return im.transpose(Image.ROTATE_180) 
    elif number == 5: 
     return im.transpose(Image.ROTATE_270) 
    else: 
     return im 

def get_random_point(maxX, maxY): 
    x = random.randint(0, maxX) 
    y = random.randint(0, maxY) 
    return x, y 

def insert_image(from_image, onto_image): 

    from_image = resize_smaller(from_image, onto_image.size) 
    x, y = get_random_point(onto_image.size[0] - from_image.size[0], onto_image.size[1] - from_image.size[0]) 
    onto_image.paste(from_image, (x, y)) 
    width = from_image.size[0] 
    height = from_image.size[1] 
    return x, y, width, height 

def resize_smaller(image, maxXY): 
    if image.size[0] > maxXY[0] or image.size[1] > maxXY[1]: 
     image = image.resize((image.size[0]/2, image.size[1]/2)) 
    if image.size[0] > maxXY[0] or image.size[1] > maxXY[1]: 
     resize_smaller(image, maxXY) 
    else: 
     return image 

training_images = get_image_list(training_path) 
background_images = get_image_list(background_path) 
print('training_images size', len(training_images)) 
print('background_images size', len(background_images)) 

for training_image in training_images: 
    index = 0 
    for background_image in background_images: 
     name = background_image 
     training_image = Image.open(training_path + '/' + training_image) 
     background_image = Image.open(background_path + '/' + background_image) 
     training_image = rotate_randomely(training_image) 
     x, y, width, height = insert_image(training_image, background_image) 
     background_image.save('images/' + str(index) + name) 
     index = index + 1 

输出： ('training_images size', 7) ('background_images size', 1)。所以它正确地找到了图像，但是当我查看结果时，只有一个图像被保存，并且只有图像名称的前0。但我知道它通过每张图片，所以应该有七张。

我一直在看这一段时间，我只是不明白我出错的地方。我不知道pil的保存方法有什么奇怪的地方吗？

Answer 1

将index = 0置于循环的上方之外，否则每次迭代它将变为0并保存在旧文件的顶部。