Method execute

sparse_tracks.py:112–139

(
        cls,
        image,
        points_store: str,
        coordinates: str,
        points_to_sample: int,
    )

    @classmethod
    def execute(
        cls,
        image,
        points_store: str,
        coordinates: str,
        points_to_sample: int,
    ) -> io.NodeOutput:
        # Re-interpolate from control points so that changes to
        # points_to_sample are always respected, regardless of JS sync.
        try:
            splines = json.loads(points_store) if points_store else []
        except (json.JSONDecodeError, TypeError):
            splines = []

        if splines and isinstance(splines, list) and isinstance(splines[0], list):
            interpolated = [_interpolate_spline(sp, points_to_sample) for sp in splines]
            tracks = json.dumps(interpolated)
        elif coordinates and coordinates != "[]":
            tracks = coordinates
        else:
            tracks = "[]"

        img_array = (image[0].cpu().numpy() * 255).astype(np.uint8)
        img = Image.fromarray(img_array)
        buf = BytesIO()
        img.save(buf, format="JPEG", quality=75)
        img_b64 = base64.b64encode(buf.getvalue()).decode("utf-8")
        return io.NodeOutput(tracks, ui={"bg_image": [img_b64]})


def _parse_tracks(raw: str) -> list[list[dict]]: