blocks|key|68024|text|你应该尝试类似这样的东西：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|68025|from+PIL+import+Image
from+io+import+BytesIO
import+base64

data['img']+=+'''R0lGODlhDwAPAKECAAAAzMzM/////wAAACwAAAAADwAPAAACIISPeQHsrZ5ModrLl
N48CXF8m2iQ3YmmKqVlRtW4MLwWACH%2BH09wdGltaXplZCBieSBVbGVhZCBTbWFydFNhdmVyIQAAOw=='''+

im+=+Image.open(BytesIO(base64.b64decode(data['img'])))|code-block|syntax|javascript|68026|您的data['img']字符串不应包含示例JSFiddle中的HTML标记或参数data:image/jpeg;base64。|offset|length|style|CODE|68027|出于可读性的目的，我已经更改了取自Google的一个示例的图像字符串。|68028|entityMap^0|0|0|2|B|15|M|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@$I|T|J|U|K|L]|$I|V|J|W|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|P|$]]

You should try something like:
<pre><code>from PIL import Image
from io import BytesIO
import base64

data['img'] = '''R0lGODlhDwAPAKECAAAAzMzM/////wAAACwAAAAADwAPAAACIISPeQHsrZ5ModrLl
N48CXF8m2iQ3YmmKqVlRtW4MLwWACH+H09wdGltaXplZCBieSBVbGVhZCBTbWFydFNhdmVyIQAAOw==''' 

im = Image.open(BytesIO(base64.b64decode(data['img'])))
</code></pre>
Your <code>data['img']</code> string should not include the HTML tags or the parameters <code>data:image/jpeg;base64</code> that are in the example JSFiddle.
I've changed the image string for an example I took from Google just for readability purposes.

blocks|key|4574591|text|img字段中包含data:image/jpeg;base64,的元数据前缀。在将图像数据嵌入到文档或样式表中时，通常在CSS或HTML数据URI中使用此元数据。它的作用是向呈现浏览器提供嵌入式数据的MIME类型和编码。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4574592|你可以在base64解码之前去掉前缀，这应该会产生有效的图像数据，PIL可以加载(见下文)，但是你真的需要质疑元数据是如何提交给你的服务器的，因为它通常不应该提交。|4574593|import+re
import+cStringIO
from+PIL+import+Image

image_data+=+re.sub('%5Edata:image/.%2B;base64,',+'',+data['img']).decode('base64')
image+=+Image.open(cStringIO.StringIO(image_data))|code-block|syntax|javascript|4574594|entityMap^0|0|3|8|N|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|U|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

There is a metadata prefix of <code>data:image/jpeg;base64,</code> being included in the <code>img</code> field. Normally this metadata is used in a CSS or HTML data URI when embedding image data into the document or stylesheet. It is there to provide the MIME type and encoding of the embedded data to the rendering browser.

You can strip off the prefix before the base64 decode and this should result in valid image data that PIL can load (see below), but you really need to question how the metadata is being submitted to your server as normally it should not.

<pre><code>import re
import cStringIO
from PIL import Image

image_data = re.sub('^data:image/.+;base64,', '', data['img']).decode('base64')
image = Image.open(cStringIO.StringIO(image_data))
</code></pre>

blocks|key|4574655|text|对于巫术，我很抱歉，但是没有一个答案对我完全有效。这是在Python+3.6和Flask+0.13上工作的代码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4574656|服务器：|4574657|from+flask+import+Flask,+jsonify,+request
from+io+import+BytesIO
from+web+import+app
import+base64
import+re
import+json
from+PIL+import+Image

@app.route('/process_image',+methods=['post'])
def+process_image():
++++image_data+=+re.sub('%5Edata:image/.%2B;base64,',+'',+request.form['data'])
++++im+=+Image.open(BytesIO(base64.b64decode(image_data)))
++++return+json.dumps({'result':+'success'}),+200,+{'ContentType':+'application/json'}|code-block|syntax|javascript|4574658|客户端JS：|4574659|//+file+comes+from+file+input
var+reader+=+new+FileReader();
reader.onloadend+=+function+()+{
++++var+fileName+=+file.name;
++++$.post('/process_image',+{+data:+reader.result,+name:+fileName+});
};
reader.readAsDataURL(file);|4574660|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Sorry for necromancy, but none of the answers worked completely for me. Here is code working on Python 3.6 and Flask 0.13.

Server:

<pre><code>from flask import Flask, jsonify, request
from io import BytesIO
from web import app
import base64
import re
import json
from PIL import Image

@app.route('/process_image', methods=['post'])
def process_image():
 image_data = re.sub('^data:image/.+;base64,', '', request.form['data'])
 im = Image.open(BytesIO(base64.b64decode(image_data)))
 return json.dumps({'result': 'success'}), 200, {'ContentType': 'application/json'}
</code></pre>

Client JS:

<pre><code>// file comes from file input
var reader = new FileReader();
reader.onloadend = function () {
 var fileName = file.name;
 $.post('/process_image', { data: reader.result, name: fileName });
};
reader.readAsDataURL(file);
</code></pre>

I'm making a simple API in Flask that accepts an image encoded in base64, then decodes it for further processing using Pillow.

I've looked at some examples (<a href="https://stackoverflow.com/questions/19908975/loading-base64-string-into-python-image-library">1</a>, <a href="https://stackoverflow.com/questions/3715493/encoding-an-image-file-with-base64">2</a>, <a href="https://stackoverflow.com/questions/19910845/strange-ioerror-when-opening-base64-string-in-pil">3</a>), and I think I get the gist of the process, but I keep getting an error where Pillow can't read the string I gave it.

Here's what I've got so far:

<pre><code>import cStringIO
from PIL import Image
import base64

data = request.form
image_string = cStringIO.StringIO(base64.b64decode(data['img']))
image = Image.open(image_string)
</code></pre>

which gives the error:

<pre><code>IOError: cannot identify image file &lt;cStringIO.StringIO object at 0x10f84c7a0&gt;
</code></pre>

Decoding base64 from POST to use in PIL

服务器

Python

我在Flask中编写了一个简单的应用程序接口，它接受以base64编码的图像，然后使用Pillow对其进行解码以便进一步处理。我看过一些示例(、、)，我想我已经理解了这个过程的要点，但我总是得到一个错误，即Pillow无法读取我给出的字符串。这是我到目前为止所得到的：import cStringIOfrom PIL i...

问将POST中的base64解码为在PIL中使用
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