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  • 将 base64 中的字符串转换为图像并保存在文件系统上

将 base64 中的字符串转换为图像并保存在文件系统上

2025-02-07 08:44:00
admin
原创
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摘要：问题描述：我有一个 base64 格式的字符串，它代表 PNG 图像。有没有办法将此图像作为 PNG 文件保存到文件系统？我使用 flex 对图像进行了编码。实际上，这是我在服务器上获得的结果（使用任何建议的方法后都看不到任何图像 :( )iVBORw0KGgoAAAANSUhEUgAABoIAAAaCCAY...

问题描述：

我有一个 base64 格式的字符串，它代表 PNG 图像。有没有办法将此图像作为 PNG 文件保存到文件系统？

我使用 flex 对图像进行了编码。实际上，这是我在服务器上获得的结果（使用任何建议的方法后都看不到任何图像 :( )

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解决方案 1：

从...开始

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AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAIcAeHkAAeLqlDIAAAAASUVORK5CYII='

使用 base64 编解码器解码数据，然后将其写入文件系统。

# In Python 2.7
fh = open("imageToSave.png", "wb")
fh.write(img_data.decode('base64'))
fh.close()

# or, more concisely using with statement
with open("imageToSave.png", "wb") as fh:
    fh.write(img_data.decode('base64'))

将此示例更新为 Python 3，它从字符串/字节.encode()和.decode()函数中删除了任意编解码器支持：

# For both Python 2.7 and Python 3.x
import base64
with open("imageToSave.png", "wb") as fh:
    fh.write(base64.decodebytes(img_data))

解决方案 2：

就这么简单！

import io, base64
from PIL import Image

# Assuming base64_str is the string value without 'data:image/jpeg;base64,'
img = Image.open(io.BytesIO(base64.decodebytes(bytes(base64_str, "utf-8"))))
img.save('my-image.jpeg')

解决方案 3：

如果 imagestr 是位图数据（我们现在知道它不是），你可以使用这个

imagestr是 base64 编码的字符串

width是图片的宽度

height是图片的高度

from PIL import Image
from base64 import decodestring

image = Image.fromstring('RGB',(width,height),decodestring(imagestr))
image.save("foo.png")

由于 imagestr 只是编码的 png 数据

from base64 import decodestring

with open("foo.png","wb") as f:
    f.write(decodestring(imagestr))

解决方案 4：

如果您尝试解码网络图像，您可以简单地使用这个：

import base64

with open("imageToSave.png", "wb") as fh:
  fh.write(base64.urlsafe_b64decode('data'))

data => 是编码的字符串

它将处理填充错误

解决方案 5：

import base64
from PIL import Image
import io
image = base64.b64decode(str('stringdata'))       
fileName = 'test.jpeg'

imagePath = ('D:\\base64toImageNewPath\\'+fileName)
img = Image.open(io.BytesIO(image))
img.save(imagePath, 'jpeg')

解决方案 6：

您还可以将其保存到字符串缓冲区，然后按照您希望的方式进行操作，

import cStringIO
data = json.loads(request.POST['imgData'])  # Getting the object from the post request
image_output = cStringIO.StringIO()
image_output.write(data.decode('base64'))   # Write decoded image to buffer
image_output.seek(0)  # seek beginning of the image string
# image_output.read()  # Do as you wish with it!

在django中，可以将其保存为上传的文件以保存到模型：

from django.core.files.uploadedfile import SimpleUploadedFile
suf = SimpleUploadedFile('uploaded_file.png', image_output.read(), content_type='image/png')

或者以电子邮件形式发送：

email = EmailMessage('Hello', 'Body goes here', 'from@example.com',
                                     ['me@me.com', ])
                email.attach('design.png', image_output.read(), 'image/png')
                email.send()

解决方案 7：

您可以使用枕头。

pip install Pillow



image = base64.b64decode(str(base64String))       
fileName = 'test.jpeg'

imagePath = FILE_UPLOAD_DIR + fileName

img = Image.open(io.BytesIO(image))
img.save(imagePath, 'jpeg')
return fileName

完整源代码参考：https ://abhisheksharma.online/convert-base64-blob-to-image-file-in-python/

解决方案 8：

尝试这个解决方案，

图像文件——>二进制编码字符串

二进制编码字符串-->图像文件

import base64

"""
1st step - convert image into binary
"""
with open("original_image.png", "rb") as original_file:
    encoded_string = base64.b64encode(original_file.read())

print(encoded_string)
# xmzWowsfJbpGwCe0DTveqwvos7Mf0lcVNe/Q+G1hO/p+UNPd/stUse8AhP/3fDixf8HI3No67nvhlYAAAAASUVORK5CYII='

print(type(encoded_string))
# <class 'bytes'>

"""
2nd step - create new image using the encoded string
"""
with open("new_image.png", "wb") as new_file:
    new_file.write(base64.decodebytes(encoded_string))

参考：

  • 使用 base64 对图像文件进行编码

  • 如何用python制作二进制图像？

解决方案 9：

您可能可以使用PyPNG 包的png.Reader对象来执行此操作 - 将 base64 字符串解码为常规字符串（通过base64标准库），然后将其传递给构造函数。

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