Run object segmentation sample code can't appear image.

[huangjiafengx]

Run the ros2 launch dynamic_vino_sample pipeline_segmentation*.py and the image not appear, after source condition.
But other test cases are normal such as pipeline_people pipeline_reidentification pipeline_image etc. otherwise the mode path
is normal too.
The cmd:
ros2 launch dynamic_vino_sample pipeline_segmentation.launch.py
ros2 launch dynamic_vino_sample pipeline_segmentation_image.launch.py

the RealSenseCamera replace by StanderdCamera for pipeline_segmentation.

[huangjiafengx]

The cmd "ros2 topic echo /ros2_openvino_toolkit/segmented_obejcts" print nothing when ros2 launch.