FlowVelocityThresholding¶
Apply thresholding to optical flow and creates mask image.
Subscribing Topic¶
~input/flows
(opencv_apps/FlowArrayStamped
)Optical flow.
~input/camera_info
(sensor_msgs/CameraInfo
)Camera info to get image size. Subscribed if
~use_camera_info
istrue
.
Publishing Topic¶
~output
(sensor_msgs/Image
)Mask image.
Parameters¶
~approximate_sync
(Bool, default:false
)Approximately synchronize inputs if it’s true.
~queue_size
(Int, default:100
)How many messages you allow about the subscriber to keep in the queue. This should be big when there is much difference about delay between two topics.
~use_camera_info
(Bool, default:true
)If
true
, output mask size is got from~input/camera_info
.~image_height
,~image_width
(Int)Output image height and width. Required if
~use_camera_info:=false
.
Sample¶
roslaunch jsk_perception sample_flow_velocity_thresholding.launch