source

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Description

Test node that publishes synthetic image data for testing cv_bridge functionality. The node generates a black image with an animated bouncing white circle and publishes both regular and compressed image messages at 30 Hz. This is useful for testing OpenCV-ROS2 image conversion and transmission pipelines.

Publishers

• /opencv_tests/images (sensor_msgs/msg/Image)

  • Raw image messages showing a bouncing white circle on a black background (480x640 grayscale)

• /opencv_tests/images/compressed (sensor_msgs/msg/CompressedImage)

  • Compressed version of the same image data

Example Usage

Launch the source node to generate test images:

ros2 run opencv_tests source

To visualize the published images:

# View raw images
ros2 run rqt_image_view rqt_image_view /opencv_tests/images

# View compressed images
ros2 run rqt_image_view rqt_image_view /opencv_tests/images/compressed

The node will continuously publish images with a bouncing ball animation until stopped with Ctrl+C.