Question

我试图以90度角旋转它来操纵base64编码图像。在这个操作之后，我想将它转换回base64字符串。但遗憾的是无法实现这一目标。

这是我到目前为止所做的：

image_string = StringIO(base64.b64decode(base64_string_here))
image = Image.open(image_string)
angle = 90
rotated_image = image.rotate( angle, expand=1 )

Kindy帮我了解如何将rotate_image转换为base64字符串。

这里是rotate_image的dir()：

[＆＃39; _Image__transformer＆＃39;，＆＃39; __ doc __＆＃39;，＆＃39; __ getattr __＆＃39;，＆＃39; __ init __＆＃39;，＆＃39; __模块__＆＃39;，＆＃39; __ repr __＆＃39;，＆＃39; _copy＆＃39;，＆＃39; _dump＆＃39;，＆＃39; _expand＆＃39;，＆＃39; _makeself＆＃39 ;, ＆＃39; _new＆＃39;，＆＃39; category＆＃39;，＆＃39; convert＆＃39;，＆＃39; copy＆＃39;，＆＃39; crop＆＃39;，＆＃39; draft＆＃39;，＆＃39; filter＆＃39;，＆＃39;格式＆＃39;，＆＃39; format_description＆＃39;，＆＃39; fromstring＆＃39;，＆＃39; getbands＆＃39;，＆＃39; getbbox＆＃39;，＆＃39; getcolors＆＃39;，＆＃39; getdata＆＃39;，＆＃39; getextrema＆＃39;，＆＃39; getim＆＃39;，＆＃39; getpalette＆＃39;，＆＃39; getpixel＆＃39;，＆＃39; getprojection＆＃39;，＆＃39; histogram＆＃39;，＆＃39; im＆＃39;，＆＃39; info＆＃39;，＆＃39; load＆＃39 ;, ＆＃39;模式＆＃39;，＆＃39;偏移＆＃39;，＆＃39;调色板＆＃39;，＆＃39;粘贴＆＃39;，＆＃39;点＆＃39;，＆＃39; putalpha＆＃39;，＆＃39; putdata＆＃39;，＆＃39; putpalette＆＃39;，＆＃39; putpixel＆＃39;，＆＃39; quantze＆＃39;，＆＃39; readonly＆＃39;，＆＃39; resize＆＃39;，＆＃39; rotate＆＃39 ;, ＆＃39;保存＆＃39;，＆＃39;寻找＆＃39;，＆＃39;显示＆＃39;，＆＃39;尺寸＆＃39;，＆＃39;拆分＆＃39;，＆＃39;告诉＆＃39;，＆＃39; thumbnail＆＃39;，＆＃39; tobitmap＆＃39;，＆＃39; tostring＆＃39;，＆＃39;转换＆＃39;，＆＃39;转置＆＃39;，＆＃39;验证＆＃39;]

Answer 1

Python 3

import base64
from io import BytesIO

buffered = BytesIO()
image.save(buffered, format="JPEG")
img_str = base64.b64encode(buffered.getvalue())

Python 2

import base64
import cStringIO

buffer = cStringIO.StringIO()
image.save(buffer, format="JPEG")
img_str = base64.b64encode(buffer.getvalue())

如何将PIL Image.image对象转换为base64字符串？

1 个答案: