python 将图像编码/解码到Base64

Posted 2021-05-09

import base64

# encode
with open("image.jpg", "rb") as image_file:
    b64_img = base64.b64encode(image_file.read()) #bytes array

# decode

"""
# convert to bytearray if needed
b64_img = b64_img.encode()
b64_img = b64_img[2:]
"""

nparr = np.frombuffer(base64.decodebytes(bytes), np.uint8)
img = cv2.imdecode(nparr, cv2.IMREAD_GRAYSCALE)