Python output numpy array as base64 encoded string instead of jpg

Question

I have a simple Python3 script that is creating an image from a numpy array using the following...

cv2.imwrite("finalImage.jpg", numpyArray)

This is working correctly but now I am looking to output a base64 encoded string instead of the jpg image.

I know I can convert the output jpg image to a base64 string but is there a way to do this directly so I can skip the extra step of outputting the JPG?

Omer Tuchfeld · Accepted Answer · 2020-03-15 11:53:00Z

3

import base64
_, imagebytes = cv2.imencode('.jpg', numpyArray)
print(base64.b64encode(imagebytes))

answered Mar 15, 2020 at 11:53

Omer Tuchfeld

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willeM_ Van Onsem · Accepted Answer · 2020-03-15 11:56:05Z

2

You can make use of imencode(..) [opencv-doc] to write the image to a memory buffer:

success, buffer = cv2.imencode('.jpg', numpyArray)

You can then for example base64 encode this:

from base64 import b64encode

encoded_image = b64encode(buffer)

answered Mar 15, 2020 at 11:56

willeM_ Van Onsem

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1 Comment

fightstarr20 Over a year ago

Thanks for that, perfect solution and works well. Thanks for the links to the doc, reading them, now to make sure I fully understand what is happening

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