Преобразование строки в base64 в изображение и сохранение в файловой системе в Python

Ответ 1

Начиная с

img_data = 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Декодирование данных с помощью кодека base64, а затем запись в файловую систему.

# 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'))

Модернизируйте этот пример для Python 3, который удалил произвольную поддержку кодеков из функций string/bytes .encode() и .decode():

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

Ответ 2

Если imagestr был битмап-данными (которые мы теперь знаем, что это не так), вы можете использовать этот

imagestr - это закодированная base64 строка
width - ширина изображения
height - высота изображения

from PIL import Image
from base64 import decodestring

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

Так как воображение представляет собой только кодированные данные png

from base64 import decodestring

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

Ответ 3

Вы также можете сохранить его в строковый буфер, а затем сделать, как хотите,

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!

В django вы можете сохранить его как загруженный файл для сохранения в модель:

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

Или отправьте его по электронной почте:

email = EmailMessage('Hello', 'Body goes here', '[email protected]',
                                     ['[email protected]', ])
                email.attach('design.png', image_output.read(), 'image/png')
                email.send()

Ответ 4

Вы можете использовать подушку.

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

ссылка на полный исходный код: https://abhisheksharma.online/convert-base64-blob-to-image-file-in-python/

Ответ 5

Вы могли бы использовать пакет PyPNG png.Reader object, чтобы сделать это - декодировать строку base64 в регулярную строку (через base64 стандартная библиотека) и передать его конструктору.

Ответ 6

Вот несколько команд, которые я собрал, надеюсь, что они могут помочь вам

import io
import cv2
import base64 
import numpy as np
from PIL import Image

#convert image to byte type
with open("tes-img/example27.png", "rb") as image_file:
    encoded_string1 = base64.b64encode(image_file.read())

#convert byte to string
encoded_string = encoded_string1.decode("utf-8")

#convert string to byte
base64_image = str.encode(encoded_string)

#save image locally
with open("tes-img/example27_2.png", "wb") as fh:
    fh.write(base64.decodebytes(base64_image))

#convert byte to numpy array for cv2 
img_color = cv2.cvtColor(np.array(Image.open(io.BytesIO(base64.b64decode(base64_image)))), cv2.COLOR_BGR2RGB)

Ответ 7

Попробуйте это решение,

файл изображения → двоичная строка

двоичная строка → файл изображения

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))

Рекомендации:

• Кодирование файла изображения с base64
• Как сделать двоичное изображение с питоном?