从 POST 解码 base64 以在 PIL 中使用 [英] Decoding base64 from POST to use in PIL

问题描述

我正在 Flask 中创建一个简单的 API，它接受以 base64 编码的图像，然后使用 Pillow 对其进行解码以进行进一步处理.

我查看了一些示例(1、2、3)，我想我明白了这个过程的要点，但我不断收到一个错误，枕头无法读取我给的字符串.

这是我到目前为止所得到的:

import cStringIO从 PIL 导入图像导入 base64数据 = request.formimage_string = cStringIO.StringIO(base64.b64decode(data['img']))图像 = Image.open(image_string)

给出错误:

IOError: cannot identify image file 

解决方案

您应该尝试以下操作:

from PIL 导入图片从 io 导入 BytesIO导入 base64data['img'] = '''R0lGODlhDwAPAKECAAAAzMzM////wAAACwAAAAADwAPAAACIISPeQHsrZ5ModrLlN48CXF8m2iQ3YmmKqVlRtW4MLwWACH+H09wdGltaXplZCBieSBVbGVhZCBTbWFydFNhdmVyIQAAOw=='''im = Image.open(BytesIO(base64.b64decode(data['img'])))

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.>

为了便于阅读，我更改了从 Google 获取的示例的图像字符串.

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 (1, 2, 3), 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:

import cStringIO
from PIL import Image
import base64

data = request.form
image_string = cStringIO.StringIO(base64.b64decode(data['img']))
image = Image.open(image_string)

which gives the error:

IOError: cannot identify image file <cStringIO.StringIO object at 0x10f84c7a0>

解决方案

You should try something like:

from PIL import Image
from io import BytesIO
import base64

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

im = Image.open(BytesIO(base64.b64decode(data['img'])))

Your data['img'] string should not include the HTML tags or the parameters data:image/jpeg;base64 that are in the example JSFiddle.

I've changed the image string for an example I took from Google just for readability purposes.

这篇关于从 POST 解码 base64 以在 PIL 中使用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！