1. 基本環(huán)境

• py2: python2.7.13
• py3: python3.6.2
• PIL: pip(2/3) install pillow, PIL庫已不再維護(hù)，而pillow是PIL的一個分支，如今已超越PIL

2.?Convert PIL.Image to Base64 String

• py2 ：先使用CStringIO.StringIO把圖片內(nèi)容轉(zhuǎn)為二進(jìn)制流，再進(jìn)行base64編碼

# -*- coding: utf-8 -*-import base64 from cStringIO import StringIO# pip2 install pillow from PIL import Imagedef image_to_base64(image_path):img = Image.open(image_path)output_buffer = StringIO()img.save(output_buffer, format='JPEG')binary_data = output_buffer.getvalue()base64_data = base64.b64encode(binary_data)return base64_data

• py3：python3中沒有cStringIO，對應(yīng)的是io，但卻不能使用io.StringIO來處理圖片，它用來處理文本的IO操作，處理圖片的應(yīng)該是io.BytesIO

import base64 from io import BytesIO# pip3 install pillow from PIL import Image# 若img.save()報(bào)錯 cannot write mode RGBA as JPEG # 則img = Image.open(image_path).convert('RGB') def image_to_base64(image_path):img = Image.open(image_path)output_buffer = BytesIO()img.save(output_buffer, format='JPEG')byte_data = output_buffer.getvalue()base64_str = base64.b64encode(byte_data)return base64_str

3.?Convert Base64 String to PIL.Image

• py2:

# -*- coding: utf-8 -*-import re import base64 from cStringIO import StringIOfrom PIL import Imagedef base64_to_image(base64_str, image_path=None):base64_data = re.sub('^data:image/.+;base64,', '', base64_str)binary_data = base64.b64decode(base64_data)img_data = StringIO(binary_data)img = Image.open(img_data)if image_path:img.save(image_path)return img

• py3:

import re import base64 from io import BytesIOfrom PIL import Imagedef base64_to_image(base64_str, image_path=None):base64_data = re.sub('^data:image/.+;base64,', '', base64_str)byte_data = base64.b64decode(base64_data)image_data = BytesIO(byte_data)img = Image.open(image_data)if image_path:img.save(image_path)return img

4. 參考網(wǎng)址

[1]?https://stackoverflow.com/questions/16065694/is-it-possible-to-create-encodeb64-from-image-object

[2]?https://stackoverflow.com/questions/31826335/how-to-convert-pil-image-image-object-to-base64-string

[3]?https://stackoverflow.com/questions/26070547/decoding-base64-from-post-to-use-in-pil

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