我想将个人资料图像裁剪为正方形并减小其尺寸。所以我用谷歌搜索了“图像调整矩阵”。没有任何结果符合我的需要，因此我编写了自己的代码。在python / django中。我认为，由于颈部和肩膀的缘故，大多数头部图像在底部都有较大的空间。因此，我从顶部而不是从中间修剪高度。所有宽度都裁剪到中间。最多使用300个像素。我想这可能对执行类似任务的人有所帮助。
我需要更多积分，以便我可以对事物进行投票。我整日使用该网站并获得很多答案，但我无法投票。这让我感到内gui。
from PIL import Image
class CustomUser(AbstractBaseUser, PermissionsMixin):
# User model fields, etc
image = models.ImageField(default='default.jpg',upload_to='profile_pics')
def save(self, *args, **kwargs):
super().save()
img = Image.open(self.image.path)
width, height = img.size # Get dimensions
if width > 300 and height > 300:
# keep ratio but shrink down
img.thumbnail((width, height))
width, height = img.size
# check which one is smaller
if height < width:
# make square by cutting off equal amounts left and right
left = (width - height) / 2
right = (width + height) / 2
top = 0
bottom = height
img = img.crop((left, top, right, bottom))
img.thumbnail((300, 300))
img.save(self.image.path)
elif width < height:
# make square by cutting off bottom
left = 0
right = width
top = 0
bottom = width
img = img.crop((left, top, right, bottom))
img.thumbnail((300, 300))
img.save(self.image.path)
else:
# already square
img.thumbnail((300, 300))
img.save(self.image.path)
elif width > 300 and height == 300:
left = (width - 300) / 2
right = (width + 300) / 2
top = 0
bottom = 300
img = img.crop((left, top, right, bottom))
img.save(self.image.path)
elif width > 300 and height < 300:
left = (width - height) / 2
right = (width + height) / 2
top = 0
bottom = height
img = img.crop((left, top, right, bottom))
img.save(self.image.path)
elif width < 300 and height > 300:
# most potential for disaster
left = 0
right = width
top = 0
bottom = width
img = img.crop((left, top, right, bottom))
img.save(self.image.path)
elif width < 300 and height < 300:
if height < width:
left = (width - height) / 2
right = (width + height) / 2
top = 0
bottom = height
img = img.crop((left, top, right, bottom))
img.save(self.image.path)
elif width < height:
height = width
left = 0
right = width
top = 0
bottom = height
img = img.crop((left, top, right, bottom))
img.save(self.image.path)
else:
img.save(self.image.path)
elif width == 300 and height > 300:
# potential for disaster
left = 0
right = 300
top = 0
bottom = 300
img = img.crop((left, top, right, bottom))
img.save(self.image.path)
elif width == 300 and height < 300:
left = (width - height) / 2
right = (width + height) / 2
top = 0
bottom = height
img = img.crop((left, top, right, bottom))
img.save(self.image.path)
elif width < 300 and height == 300:
left = 0
right = width
top = 0
bottom = width
img = img.crop((left, top, right, bottom))
img.save(self.image.path)
elif width and height == 300:
img.save(self.image.path)
答案 0 :(得分：0)
您可以使用Pillow在python中操作图像。您可以使用pip安装它。它具有很多功能，可以帮助您处理图像。您可以在此处了解有关枕头的更多信息：
答案 1 :(得分：0)
您重复了相同的条件块3次，这使您的代码难以阅读和维护。
下面的代码与您执行的完全相同，没有重复我提到的过程。
from PIL import Image
class CustomUser(AbstractBaseUser, PermissionsMixin):
# User model fields, etc
image = models.ImageField(default='default.jpg',upload_to='profile_pics')
def save(self, *args, **kwargs):
super().save()
img = Image.open(self.image.path)
width, height = img.size # Get dimensions
if width > 300 and height > 300:
# keep ratio but shrink down
img.thumbnail((width, height))
# check which one is smaller
if height < width:
# make square by cutting off equal amounts left and right
left = (width - height) / 2
right = (width + height) / 2
top = 0
bottom = height
img = img.crop((left, top, right, bottom))
elif width < height:
# make square by cutting off bottom
left = 0
right = width
top = 0
bottom = width
img = img.crop((left, top, right, bottom))
if width > 300 and height > 300:
img.thumbnail((300, 300))
img.save(self.image.path)
答案 2 :(得分：0)
尝试一下。
from PIL import Image
class CustomUser(AbstractBaseUser, PermissionsMixin):
# User model fields, etc
image = models.ImageField(default='default.jpg',upload_to='profile_pics')
def save(self, *args, **kwargs):
super().save()
img = Image.open(self.user_profile_img.path)
# When image height is greater than its width
if img.height > img.width:
# make square by cutting off equal amounts top and bottom
left = 0
right = img.width
top = (img.height - img.width)/2
bottom = (img.height + img.width)/2
img = img.crop((left, top, right, bottom))
# Resize the image to 300x300 resolution
if img.height > 300 or img.width >300:
output_size = (300, 300)
img.thumbnail(output_size)
img.save(self.user_profile_img.path)
# When image width is greater than its height
elif img.width > img.height:
# make square by cutting off equal amounts left and right
left = (img.width - img.height)/2
right = (img.width + img.height)/2
top = 0
bottom = img.height
img = img.crop((left, top, right, bottom))
# Resize the image to 300x300 resolution
if img.height > 300 or img.width >300:
output_size = (300, 300)
img.thumbnail(output_size)
img.save(self.user_profile_img.path)
答案 3 :(得分：0)
django-cropper-image 是一个客户端裁剪和压缩上传图像的应用程序，通过 Django 的应用程序使用帮助cropper.js。 github 链接 django-cropper-image。
from django.db import models
from django_cropper_image.fields import ImageCropperField
class Images(models.Model):
image = ImageCropperField(upload_to='image',max_length=255)