How to convert base64 string to image? [duplicate]
I'm converting an image to base64 string and sending it from android device to the server. Now, I need to change that string back to an image and save it in the database.
Any help?
Solution 1:
Try this:
import base64
imgdata = base64.b64decode(imgstring)
filename = 'some_image.jpg' # I assume you have a way of picking unique filenames
with open(filename, 'wb') as f:
f.write(imgdata)
# f gets closed when you exit the with statement
# Now save the value of filename to your database
Solution 2:
Return converted image without saving:
from PIL import Image
import cv2
# Take in base64 string and return cv image
def stringToRGB(base64_string):
imgdata = base64.b64decode(str(base64_string))
image = Image.open(io.BytesIO(imgdata))
return cv2.cvtColor(np.array(image), cv2.COLOR_BGR2RGB)
Solution 3:
Just use the method .decode('base64')
and go to be happy.
You need, too, to detect the mimetype/extension of the image, as you can save it correctly, in a brief example, you can use the code below for a django view:
def receive_image(req):
image_filename = req.REQUEST["image_filename"] # A field from the Android device
image_data = req.REQUEST["image_data"].decode("base64") # The data image
handler = open(image_filename, "wb+")
handler.write(image_data)
handler.close()
And, after this, use the file saved as you want.
Simple. Very simple. ;)
Solution 4:
This should do the trick:
image = open("image.png", "wb")
image.write(base64string.decode('base64'))
image.close()
Solution 5:
You can try using open-cv to save the file since it helps with image type conversions internally. The sample code:
import cv2
import numpy as np
def save(encoded_data, filename):
nparr = np.fromstring(encoded_data.decode('base64'), np.uint8)
img = cv2.imdecode(nparr, cv2.IMREAD_ANYCOLOR)
return cv2.imwrite(filename, img)
Then somewhere in your code you can use it like this:
save(base_64_string, 'testfile.png');
save(base_64_string, 'testfile.jpg');
save(base_64_string, 'testfile.bmp');