这种裁剪算法的更优雅的改写是什么？（Python）

发布于 2024-07-16 17:46:02 字数 648 浏览 13 评论 0原文

我想在 Django 应用程序中裁剪缩略图，以便获得显示图像中心的二次图像。这并不难，我同意。

我已经编写了一些代码来完成此任务，但不知怎的，它缺乏某种......优雅。我不想玩代码高尔夫，但我认为必须有一种方法来表达这种更短、更Pythonic的方式。

x = y = 200 # intended size
image = Image.open(filename)
width = image.size[0]
height = image.size[1]
if (width > height):
    crop_box = ( ((width - height)/2), 0, ((width - height)/2)+height, height )
    image = image.crop(crop_box)
elif (height > width):
    crop_box = ( 0, ((height - width)/2), width, ((height - width)/2)+width )
    image = image.crop(crop_box)
image.thumbnail([x, y], Image.ANTIALIAS)

你有什么想法吗？

编辑：解释x，y

原文

I want to crop a thumbnail image in my Django application, so that I get a quadratic image that shows the center of the image. This is not very hard, I agree.

I have already written some code that does exactly this, but somehow it lacks a certain ... elegance. I don't want to play code golf, but there must be a way to express this shorter and more pythonic, I think.

x = y = 200 # intended size
image = Image.open(filename)
width = image.size[0]
height = image.size[1]
if (width > height):
    crop_box = ( ((width - height)/2), 0, ((width - height)/2)+height, height )
    image = image.crop(crop_box)
elif (height > width):
    crop_box = ( 0, ((height - width)/2), width, ((height - width)/2)+width )
    image = image.crop(crop_box)
image.thumbnail([x, y], Image.ANTIALIAS)

Do you have any ideas, SO?

edit: explained x, y

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蓝天 2024-07-23 17:46:02

我认为这应该可以。

size = min(image.Size)

originX = image.Size[0] / 2 - size / 2
originY = image.Size[1] / 2 - size / 2

cropBox = (originX, originY, originX + size, originY + size)

I think this should do.

size = min(image.Size)

originX = image.Size[0] / 2 - size / 2
originY = image.Size[1] / 2 - size / 2

cropBox = (originX, originY, originX + size, originY + size)

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青春如此纠结 2024-07-23 17:46:02

PIL 中的 fit() 函数 ImageOps 模块执行您想要的操作：

ImageOps.fit(image, (min(*image.size),) * 2, Image.ANTIALIAS, 0, (.5, .5))

The fit() function in the PIL ImageOps module does what you want:

ImageOps.fit(image, (min(*image.size),) * 2, Image.ANTIALIAS, 0, (.5, .5))

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萌能量女王 2024-07-23 17:46:02

width, height = image.size
if width > height:
    crop_box = # something 1
else:
    crop_box = # something 2
image = image.crop(crop_box)
image.thumbnail([x, x], Image.ANTIALIAS)   # explicitly show "square" thumbnail

width, height = image.size
if width > height:
    crop_box = # something 1
else:
    crop_box = # something 2
image = image.crop(crop_box)
image.thumbnail([x, x], Image.ANTIALIAS)   # explicitly show "square" thumbnail

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