Example usage of backpack.annotation module

backpack-annotation-example.py

import panoramasdk
from backpack.annotation import (
    Point, LabelAnnotation, RectAnnotation, TimestampAnnotation,
    OpenCVImageAnnotationDriver, 
    PanoramaMediaAnnotationDriver
)

class Application(panoramasdk.node):

    def __init__(self):
        super().__init__()
        # self.skyline = ... 
        self.panorama_driver = PanoramaMediaAnnotationDriver()
        self.cv2_driver = OpenCVImageAnnotationDriver()

    # called from video processing loop:
    def process_streams(self):
        streams = self.inputs.video_in.get()
        for idx, stream in enumerate(streams):
            annotations = [
                TimestampAnnotation(),
                RectAnnotation(point1=Point(0.1, 0.1), point2=Point(0.9, 0.9)),
                LabelAnnotation(point=Point(0.5, 0.5), text='Hello World!')
            ]
            self.panorama_driver.render(annotations, stream)

            # TODO: eventually multiplex streams to a single frame
            if idx == 0:
                rendered = self.cv2_driver.render(annotations, stream.image.copy())
                # self.skyline.put(rendered)