Question

我有以下代码，我认为会调整指定路径中的图像但是当我运行它时，没有任何作用，但python不会抛出任何错误，所以我不知道该怎么做。请指教。感谢。

from PIL import Image
import os, sys

path = ('C:\Users\Maxxie\color\complete')

def resize():
for item in os.listdir(path):
    if os.path.isfile(item):
        im = Image.open(item)
        f, e = os.path.splitext(item)
        imResize = im.resize((200,200), Image.ANTIALIAS)
        imResize.save(f + ' resized.jpg', 'JPEG', quality=90)

resize()

Answer 1

#!/usr/bin/python
from PIL import Image
import os, sys

path = "/root/Desktop/python/images/"
dirs = os.listdir( path )

def resize():
    for item in dirs:
        if os.path.isfile(path+item):
            im = Image.open(path+item)
            f, e = os.path.splitext(path+item)
            imResize = im.resize((200,200), Image.ANTIALIAS)
            imResize.save(f + ' resized.jpg', 'JPEG', quality=90)

resize()

您的错误属于文件的完整路径。而不是项必须是路径+项

Answer 2

如果您想保持图像的纵横比相同，可以使用此脚本。

sed 's/##*/\n/g;s/^\n\|\n$//g;s/,/ has /g;s/\n\|$/ values&/g' <<<"$input"

Answer 3

对于Windows上的用户：

from PIL import Image
import glob

image_list = []
resized_images = []

for filename in glob.glob('YOURPATH\\*.jpg'):
    print(filename)
    img = Image.open(filename)
    image_list.append(img)

for image in image_list:
    image = image.resize((224, 224))
    resized_images.append(image)

for (i, new) in enumerate(resized_images):
    new.save('{}{}{}'.format('YOURPATH\\', i+1, '.jpg'))

Answer 4

这段代码对我来说可以调整图像的大小。

from PIL import Image
import glob
import os

# new folder path (may need to alter for Windows OS)
# change path to your path
path = 'yourpath/Resized_Shapes' #the path where to save resized images
# create new folder
if not os.path.exists(path):
    os.makedirs(path)

# loop over existing images and resize
# change path to your path
for filename in glob.glob('your_path/*.jpg'): #path of raw images
    img = Image.open(filename).resize((306,306))
    # save resized images to new folder with existing filename
    img.save('{}{}{}'.format(path,'/',os.path.split(filename)[1]))

Answer 5

扩展@Sanjar Stone的出色解决方案

包括子文件夹，也可以避免DS警告，您可以使用glob库：

from PIL import Image
import os, sys
import glob

root_dir = "/.../.../.../"


for filename in glob.iglob(root_dir + '**/*.jpg', recursive=True):
    print(filename)
    im = Image.open(filename)
    imResize = im.resize((28,28), Image.ANTIALIAS)
    imResize.save(filename , 'JPEG', quality=90)

Answer 6

John Ottenlips的解决方案创建的图片在顶部/底部带有黑色边框，我认为是因为他使用了

  Image.new("RGB", (final_size, final_size))

即使原始图片不是正方形，它也会以final_size作为尺寸创建一个正方形的新图像。

这可以解决问题，我认为可以使解决方案更加清晰：

from PIL import Image
import os

path = "C:/path/needs/to/end/with/a/"
resize_ratio = 0.5  # where 0.5 is half size, 2 is double size

def resize_aspect_fit():
    dirs = os.listdir(path)
    for item in dirs:
        if item == '.jpg':
            continue
        if os.path.isfile(path+item):
            image = Image.open(path+item)
            file_path, extension = os.path.splitext(path+item)

            new_image_height = int(image.size[0] / (1/resize_ratio))
            new_image_length = int(image.size[1] / (1/resize_ratio))

            image = image.resize((new_image_height, new_image_length), Image.ANTIALIAS)
            image.save(file_path + "_small" + extension, 'JPEG', quality=90)


resize_aspect_fit()

Answer 7

从@Sanjar Stone大量借用了代码。此代码在Windows OS中运行良好。可用于将图像的大小重新调整并重新组合到其相应的子目录。

Original folder with it subdir:
..\DATA\ORI-DIR
├─Apolo
├─Bailey
├─Bandit
├─Bella

新文件夹及其子目录：

..\DATA\NEW-RESIZED-DIR
├─Apolo
├─Bailey
├─Bandit
├─Bella

要害链接：https://gist.github.com/justudin/2c1075cc4fd4424cb8ba703a2527958b

from PIL import Image
import glob
import os

# new folder path (may need to alter for Windows OS)
# change path to your path
ORI_PATH = '..\DATA\ORI-DIR'
NEW_SIZE = 224
PATH = '..\DATA\NEW-RESIZED-DIR' #the path where to save resized images

# create new folder
if not os.path.exists(PATH):
    os.makedirs(PATH)

# loop over existing images and resize
# change path to your path
for filename in glob.glob(ORI_PATH+'**/*.jpg'): #path of raw images with is subdirectory
    img = Image.open(filename).resize((NEW_SIZE,NEW_SIZE))
    
    # get the original location and find its subdir
    loc = os.path.split(filename)[0]
    subdir = loc.split('\\')[1]
    
    # assembly with its full new directory
    fullnew_subdir = PATH+"/"+subdir
    name = os.path.split(filename)[1]
    
    # check if the subdir is already created or not
    if not os.path.exists(fullnew_subdir):
        os.makedirs(fullnew_subdir)
    
    # save resized images to new folder with existing filename
    img.save('{}{}{}'.format(fullnew_subdir,'/',name))

Answer 8

扩展了Andrei M的答案。为了仅更改图片的高度并自动调整宽度。

from PIL import Image
import os

path = "D:/.../.../.../resized/"
dirs = os.listdir(path)

def resize():
    for item in dirs:
        if item == '.jpg':
            continue
        if os.path.isfile(path+item):
            image = Image.open(path+item)
            file_path, extension = os.path.splitext(path+item)
            size = image.size

            new_image_height = 190
            new_image_width = int(size[1] / size[0] * new_image_height)

            image = image.resize((new_image_height, new_image_width), Image.ANTIALIAS)
            image.save(file_path + "_small" + extension, 'JPEG', quality=90)


resize()

Python / PIL调整文件夹中的所有图像

8 个答案: