Convert Image to binary stream

Question

There are two sides to my app, on one side I\'m using C++ in order to read the frames from a camera using Pleora\'s EBUS SDK. When this stream is first received, before I co

Answer 1

The solution that I've chosen is to convert the image into an 8-bit greyscale image then convert the desired pixel into its 16-bit counterpart. The solution looks like the following:

import base64
import io
from PIL import Image

if request.method == 'GET':
    if request.GET['pos'] and request.GET['frame']:
        pos = json.loads(request.GET['pos'])
        str_frame = json.loads(request.GET['frame'])

        # Converts the base64 string into a byte string, we need to encode
        # str_frame as utf-8 first otherwise python3.2 complains about unicode
        b64decoded_frame = base64.b64decode(str_frame.encode('utf-8'))

        # This puts the decoded image into a buffer so that I don't need to save
        # it to disk to use it in PIL
        byte_stream = io.BytesIO(b64decoded_frame)

        # Open the image and convert it to 8-bit greyscale (mono8)
        img = Image.open(byte_stream).convert('L')

        # Get the 8-bit pixel value
        pixel_val = img.getpixel((pos['x'], pos['y']))

        # Convert the 8-bit pixel value to 16-bit by holding the rations
        # i.e. n8 / (2^8 - 1) == x16 / (2^16 - 1)
        pixel_val = int(pixel_val / 255 * 65535)