如何将base64转换为TIFF图像或PNG图像？

Question

我有一个base64编码的TIFF图像类型的字符串，我想使用python将其转换为PNG图像。 我看到了一个可以操作tiff文件的包枕，但是如何继续使用给定的“base64 of TIFF”？

Answer 1

base64到tiff ：

import base64

text_base64 = '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'

bytes_base64 = text_base64.encode()
data = base64.b64decode(bytes_base64)
open('image.tiff', 'wb').write(data)

tiff到base64和html ：

import base64

data = open('image.tiff', 'rb').read()
bytes_base64 = base64.b64encode(data)
text_base64 = bytes_base64.decode()

print(text_base64)

html = '<img src="data:image/tiff;base64,' + text_base64 + '">'
open('output-tiff.html', 'w').write(html)

可能大多数浏览器都无法显示tiff，因此文件.html可能会显示损坏的图像。 您必须将其从一个页面保存到另一个文件，然后您可以看到tiff。

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这是示例中使用的图像，但这里是png格式：

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编辑：具有相同图像但以png格式表示的示例。 这个html将在每个浏览器中显示图像。

# base64 to png

import base64

text_base64 = 'iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAAAAACoWZBhAAAAMklEQVR4nEXNwQkAMBACwfFI/y2bxwXia8FFUwF1pCCNJTIIwaD04ctsKRyaldI/9i8u1iwOE6FA880AAAAASUVORK5CYII='

bytes_base64 = text_base64.encode()
data = base64.b64decode(bytes_base64)
open('image.png', 'wb').write(data)

# png to base64 and html

import base64

data = open('image.png', 'rb').read()
bytes_base64 = base64.b64encode(data)
text_base64 = bytes_base64.decode()

print(text_base64)

html = '<img src="data:image/png;base64,' + text_base64 + '">'
open('output-png.html', 'w').write(html)

Answer 2

以下是如何在Python Wand中使用PNG，它基于Imagemagick。

#!/bin/python3.7

from wand.image import Image

with Image(filename='inline:data:image/png;base64,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') as img:
    img.save(filename='noseguy_b64.png')