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rgbd_image_proc is an application available in ccny_rgbd. The application subscribes to the output of RGB-D cameras as produces by the openni_camera (or compatible) driver and performs image rectification, depth-to-rgb registration, depth unwarping, and point cloud generation.

Two drivers are available: rgbd_image_proc_nodelet and rgbd_image_proc_node. Their parameters and topics are identical.

ROS API

Subscribed topics

/camera/rgb/image_color (sensor_msgs/Image)

• Debayered RGB image

/camera/depth/image_raw (sensor_msgs/Image)

• Depth image, 16UC1 encoding, in millimeters (0 = invalid data)

/camera/rgb/camera_info (sensor_msgs/CameraInfo)

• CameraInfo associated with the RGB image

/camera/depth/camera_info (sensor_msgs/CameraInfo)

• CameraInfo associated with the Depth image

Published topics

/rgbd/rgb (sensor_msgs/Image)

• Output RGB image (rescaled, rectified)

/rgbd/depth (sensor_msgs/Image)

• Output Depth image (rescaled, rectified, registered in the RGB frame, and unwarped)

/rgbd/info (sensor_msgs/CameraInfo)

• Optimal CameraInfo after rescaling and rectification (has 0 distortion). Applies to both images.

/rgbd/cloud (sensor_msgs/PointCloud2)

• Textured point cloud

Parameters

~queue_size (int, default: 5)

• input and output queue sizes

~calib_path (string, default: "$HOME/.ros/rgbd_calibration")

• path to folder where calibration .yml files are stored

~scale (double, default: 1.0)

• rescaling parameter. Output image dimensions = input image dimensions / scale.

~unwarp (bool, default: true)

• whether to perform per-pixel unwarping of the depth image based on a polynomial calibration model. If true, calib_path/warp.yml must exist. If false, the depth values won't be modified.

~publish_cloud (bool, default: true)

• whether to publish the textured sensor_msgs/PointCloud2. Disabling this will increase performance when no point cloud is required.