eye_images.py

def execute(eyetracker):
    if eyetracker is not None:
        eye_images(eyetracker)
    else:
        print("No tracker with eye images to run example.")


# <BeginExample>

import sys
import base64
import time
import tobii_research as tr

if sys.version_info[0] == 3:
    # Python 3
    from tkinter import Tk, PhotoImage
else:
    from Tkinter import Tk, PhotoImage


def eye_image_callback(eye_image_data):
    print("System time: {0}, Device time {1}, Camera id {2}".format(eye_image_data['system_time_stamp'],
                                                                    eye_image_data['device_time_stamp'],
                                                                    eye_image_data['camera_id']))

    image = PhotoImage(data=base64.standard_b64encode(eye_image_data['image_data']))
    print("{0} width {1}, height {2}".format(image, image.width(), image.height()))


def eye_images(eyetracker):
    root = Tk()
    print("Subscribing to eye images for eye tracker with serial number {0}.".format(eyetracker.serial_number))
    eyetracker.subscribe_to(tr.EYETRACKER_EYE_IMAGES, eye_image_callback, as_dictionary=True)

    # Wait for eye images.
    time.sleep(2)

    eyetracker.unsubscribe_from(tr.EYETRACKER_EYE_IMAGES, eye_image_callback)
    print("Unsubscribed from eye images.")
    root.destroy()
# <EndExample>