python调整图像大小而不会丢失锐度

问题描述：

from PIL import Image
import sys
image = Image.open(sys.argv[1])

basewidth = 1200
img = image
wpercent = (basewidth / float(img.size[0]))
hsize = int((float(img.size[1]) * float(wpercent)))
img = img.resize((basewidth, hsize), Image.BICUBIC)
img.save('sompic1.jpg')

print "image to %s" % (str(img.size))

我想调整1200xauto的大小并且这不会失去任何比例图像必须保持其shartness等等。

i want to resize 1200xauto and this without losing any ratio so the image must keep its shartness etc etc.

但重新调整大小的图像会以某种方式在锐度中被破坏。我也使用 ANTIALIAS ，但没有变化。怎么可能不失去锐度？

but resized images are somehow destroyed in sharpness. I used ANTIALIAS also, but no change. how is it possible not to lose the sharpness?

原始图片：（600x450）

original image: (600x450)

新的（1200x630）：

new one (1200x630):

答

您正在尝试将图片尺寸调整为比原尺寸更大的尺寸，这是正常的，您可以放松质量。

You are trying to resize an image to a larger size than the original, it is normal that you loose quality.

要将图像尺寸调整为更小的尺寸，您可以查看我创建的这个模块： python-image-resize

To resize you image to a smaller size, you may have a look at this module I created: python-image-resize

python调整图像大小而不会丢失锐度

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