有没有我忽略的明显的方法?我只是想做个缩略图。
当前回答
# Importing Image class from PIL module
from PIL import Image
# Opens a image in RGB mode
im = Image.open(r"C:\Users\System-Pc\Desktop\ybear.jpg")
# Size of the image in pixels (size of original image)
# (This is not mandatory)
width, height = im.size
# Setting the points for cropped image
left = 4
top = height / 5
right = 154
bottom = 3 * height / 5
# Cropped image of above dimension
# (It will not change original image)
im1 = im.crop((left, top, right, bottom))
newsize = (300, 300)
im1 = im1.resize(newsize)
# Shows the image in image viewer
im1.show()
其他回答
基于@tomvon,我完成了以下使用(选择你的案例):
a)调整高度(我知道新的宽度,所以我需要新的高度)
new_width = 680
new_height = new_width * height / width
b)调整宽度(我知道新的高度,所以我需要新的宽度)
new_height = 680
new_width = new_height * width / height
然后:
img = img.resize((new_width, new_height), Image.ANTIALIAS)
举个丑陋的例子。
函数获取像pic[0-9a-z]这样的文件。[扩展]",将它们调整为120x120,移动部分到中心,并保存到"ico[0-9a-z]。[扩展]”,肖像和风景作品:
def imageResize(filepath):
from PIL import Image
file_dir=os.path.split(filepath)
img = Image.open(filepath)
if img.size[0] > img.size[1]:
aspect = img.size[1]/120
new_size = (img.size[0]/aspect, 120)
else:
aspect = img.size[0]/120
new_size = (120, img.size[1]/aspect)
img.resize(new_size).save(file_dir[0]+'/ico'+file_dir[1][3:])
img = Image.open(file_dir[0]+'/ico'+file_dir[1][3:])
if img.size[0] > img.size[1]:
new_img = img.crop( (
(((img.size[0])-120)/2),
0,
120+(((img.size[0])-120)/2),
120
) )
else:
new_img = img.crop( (
0,
(((img.size[1])-120)/2),
120,
120+(((img.size[1])-120)/2)
) )
new_img.save(file_dir[0]+'/ico'+file_dir[1][3:])
from PIL import Image
from resizeimage import resizeimage
def resize_file(in_file, out_file, size):
with open(in_file) as fd:
image = resizeimage.resize_thumbnail(Image.open(fd), size)
image.save(out_file)
image.close()
resize_file('foo.tif', 'foo_small.jpg', (256, 256))
我使用这个库:
pip install python-resize-image
# Importing Image class from PIL module
from PIL import Image
# Opens a image in RGB mode
im = Image.open(r"C:\Users\System-Pc\Desktop\ybear.jpg")
# Size of the image in pixels (size of original image)
# (This is not mandatory)
width, height = im.size
# Setting the points for cropped image
left = 4
top = height / 5
right = 154
bottom = 3 * height / 5
# Cropped image of above dimension
# (It will not change original image)
im1 = im.crop((left, top, right, bottom))
newsize = (300, 300)
im1 = im1.resize(newsize)
# Shows the image in image viewer
im1.show()
我用这种方法调整了图像的大小,效果很好
from io import BytesIO
from django.core.files.uploadedfile import InMemoryUploadedFile
import os, sys
from PIL import Image
def imageResize(image):
outputIoStream = BytesIO()
imageTemproaryResized = imageTemproary.resize( (1920,1080), Image.ANTIALIAS)
imageTemproaryResized.save(outputIoStream , format='PNG', quality='10')
outputIoStream.seek(0)
uploadedImage = InMemoryUploadedFile(outputIoStream,'ImageField', "%s.jpg" % image.name.split('.')[0], 'image/jpeg', sys.getsizeof(outputIoStream), None)
## For upload local folder
fs = FileSystemStorage()
filename = fs.save(uploadedImage.name, uploadedImage)
推荐文章
- 证书验证失败:无法获得本地颁发者证书
- 当使用pip3安装包时,“Python中的ssl模块不可用”
- 无法切换Python与pyenv
- Python if not == vs if !=
- 如何从scikit-learn决策树中提取决策规则?
- 为什么在Mac OS X v10.9 (Mavericks)的终端中apt-get功能不起作用?
- 将旋转的xtick标签与各自的xtick对齐
- 为什么元组可以包含可变项?
- 如何合并字典的字典?
- 如何创建类属性?
- 不区分大小写的“in”
- 在Python中获取迭代器中的元素个数
- 解析日期字符串并更改格式
- 使用try和。Python中的if
- 如何在Python中获得所有直接子目录