blocks|key|1245519|text|将图像粘贴到具有合适大小的透明图像中作为背景|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1245520|from+PIL+import+Image
size+=+(36,+36)
image+=+Image.open(data)
image.thumbnail(size,+Image.ANTIALIAS)
background+=+Image.new('RGBA',+size,+(255,+255,+255,+0))
background.paste(
++++image,+(int((size[0]+-+image.size[0])+/+2),+int((size[1]+-+image.size[1])+/+2))
)
background.save("output.png")|code-block|syntax|javascript|1245521|编辑:修复语法错误|1245522|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Paste the image into a transparent image with the right size as a background

<pre><code>from PIL import Image
size = (36, 36)
image = Image.open(data)
image.thumbnail(size, Image.ANTIALIAS)
background = Image.new('RGBA', size, (255, 255, 255, 0))
background.paste(
 image, (int((size[0] - image.size[0]) / 2), int((size[1] - image.size[1]) / 2))
)
background.save("output.png")
</code></pre>

EDIT: fixed syntax error

blocks|key|1460296|text|PIL已经有一个函数可以做到这一点：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1460297|from+PIL+import+Image,+ImageOps
thumb+=+ImageOps.fit(image,+size,+Image.ANTIALIAS)|code-block|syntax|javascript|1460298|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

PIL already has a function to do exactly that:

<pre><code>from PIL import Image, ImageOps
thumb = ImageOps.fit(image, size, Image.ANTIALIAS)
</code></pre>

blocks|key|1460316|text|或者这个也许..。(原谅意大利面)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1460317|from+PIL+import+Image

def+process_image(image,+size):
++++if+image.size[0]+>+size[0]+or+image.size[1]+>+size[1]:
++++++++#preserve+original
++++++++thumb+=+image.copy()
++++++++thumb.thumbnail(size,Image.ANTIALIAS)
++++++++img+=+thumb.copy()
++++img_padded+=+Image.new("RGBA",size)
++++img_padded.paste(image,(int((size[0]-image.size[0])/2),int((size[1]-image.size[1])/2)))
++++return+img_padded|code-block|syntax|javascript|1460318|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Or this, maybe... (forgive spaghetti)

<pre><code>from PIL import Image

def process_image(image, size):
 if image.size[0] &gt; size[0] or image.size[1] &gt; size[1]:
 #preserve original
 thumb = image.copy()
 thumb.thumbnail(size,Image.ANTIALIAS)
 img = thumb.copy()
 img_padded = Image.new("RGBA",size)
 img_padded.paste(image,(int((size[0]-image.size[0])/2),int((size[1]-image.size[1])/2)))
 return img_padded
</code></pre>

blocks|key|1245620|text|from+PIL+import+Image

import+StringIO

def+thumbnail_image():
++++image+=+Image.open("image.png")
++++image.thumbnail((300,+200))
++++thumb_buffer+=+StringIO.StringIO()
++++image.save(thumb_buffer,+format=image.format)
++++fp+=+open("thumbnail.png",+"w")
++++fp.write(thumb_buffer.getvalue())
++++fp.close()|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1245621|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>from PIL import Image

import StringIO

def thumbnail_image():
 image = Image.open("image.png")
 image.thumbnail((300, 200))
 thumb_buffer = StringIO.StringIO()
 image.save(thumb_buffer, format=image.format)
 fp = open("thumbnail.png", "w")
 fp.write(thumb_buffer.getvalue())
 fp.close()
</code></pre>

blocks|key|1245689|text|您可以将Nadia的答案包装在此函数中，它使您可以控制大小和背景。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1245690|def+make_square(im,+min_size=36,+fill_color=(255,+255,+255,+0)):
++++x,+y+=+im.size
++++size+=+min(min_size,+x,+y)
++++new_im+=+Image.new('RGBA',+(size,+size),+fill_color)
++++im.thumbnail((256,+256))
++++new_im.paste(im,+(int((x+-+size)+/+2),+int((y+-size)+/+2))
++++return+new_im|code-block|syntax|javascript|1245691|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

you can wrap Nadia's answer in this function, which gives you control over size and background.

<pre><code>def make_square(im, min_size=36, fill_color=(255, 255, 255, 0)):
 x, y = im.size
 size = min(min_size, x, y)
 new_im = Image.new('RGBA', (size, size), fill_color)
 im.thumbnail((256, 256))
 new_im.paste(im, (int((x - size) / 2), int((y -size) / 2))
 return new_im
</code></pre>

blocks|key|1460428|text|更新Cesar+Canassa's+answer。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1460429|这将创建一个作为image_thumb.jpg的image.jpg缩略图|style|CODE|1460430|from+PIL+import+Image,+ImageOps
fname+=+'image.jpg'
size+=+(48,48)
thumb+=+ImageOps.fit(Image.open(fname),+size,+Image.ANTIALIAS)
thumb.save('{}_thumb.jpg'.format(fname[:fname.rfind('.')]),+"JPEG")|code-block|syntax|javascript|1460431|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/8469920/2351696^0|2|M|0|0|8|F|O|9|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|6|7|Y|8|@$A|Z|B|10|F|G]|$A|11|B|12|F|G]]|9|@]|C|$]]|$1|H|3|I|5|J|7|13|8|@]|9|@]|C|$K|L]]|$1|M|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

Update of <a href="https://stackoverflow.com/a/8469920/2351696">Cesar Canassa's answer</a>.

This will create a thumbnail of <code>image.jpg</code> as <code>image_thumb.jpg</code>:

<pre><code>from PIL import Image, ImageOps
fname = 'image.jpg'
size = (48,48)
thumb = ImageOps.fit(Image.open(fname), size, Image.ANTIALIAS)
thumb.save('{}_thumb.jpg'.format(fname[:fname.rfind('.')]), "JPEG")
</code></pre>

blocks|key|1460459|text|为什么不简单地使用resize方法呢？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1460460|from+PIL+import+Image
image+=+Image.open('/path/to/img.png')
image+=+image.resize((36,36),+Image.ANTIALIAS)|code-block|syntax|javascript|1460461|请参阅此发行说明中关于调整图像大小的建议：https://pillow.readthedocs.io/en/stable/releasenotes/5.3.0.html|offset|length|1460462|entityMap|0|LINK|mutability|MUTABLE|url|https://pillow.readthedocs.io/en/stable/releasenotes/5.3.0.html^0|0|0|L|1R|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Why not simply use the resize method ?

<pre><code>from PIL import Image
image = Image.open('/path/to/img.png')
image = image.resize((36,36), Image.ANTIALIAS)
</code></pre>

See recommendations for image resizing in this release note:
<a href="https://pillow.readthedocs.io/en/stable/releasenotes/5.3.0.html" rel="nofollow noreferrer">https://pillow.readthedocs.io/en/stable/releasenotes/5.3.0.html</a>

Calling

<pre><code>image = Image.open(data)
image.thumbnail((36,36), Image.NEAREST)
</code></pre>

will maintain the aspect ratio. But I need to end up displaying the image like this:

<pre><code>&lt;img src="/media/image.png" style="height:36px; width:36px" /&gt;
</code></pre>

Can I have a letterbox style with either transparent or white around the image?

PIL: Thumbnail and end up with a square image

呼叫image = Image.open(data)image.thumbnail((36,36), Image.NEAREST)将保持纵横比。但我最终需要像这样显示图像：<img src="/media/image.png" style="height:36px; width:36px" />我可以使用透明或白色的信...

问PIL:缩略图，并以正方形图像结束
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问PIL:缩略图，并以正方形图像结束EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问PIL:缩略图，并以正方形图像结束
EN