ROS package for LDLS (Label Diffusion Lidar Segmentation)

Currently, this code only supports offline processing by reading lidar point clouds and camera images from an input rosbag, and then writing Mask-RCNN and LDLS results to an output rosbag. It is assumed that the input rosbag includes one lidar point cloud for each image, and vice versa, and the two are synchronized in time.

Requires ROS kinetic, and an Nvidia GPU. Tested on an Ubuntu 16.04 computer with an Nvidia GTX 1060.

The Mask-RCNN ROS package from https://github.com/akio/mask_rcnn_ros must be installed

Also required are numba (with CUDA support), and cupy.

To generate Mask-RCNN results: python write_mrcnn_results.py PATH_TO_LIDAR_AND_IMAGES_ROSBAG.bag

Rosbag with Mask-RCNN results will be written to mrcnn.bag

To generate LDLS results: python write_ldls_results.py mrcnn.bag

Rosbag with LDLS results will be written to ldls.bag

The image_topic variable in write_mrccn_bag.py and the lidar_topic variable in write_ldls_bag.py should be changed to the correct image and Velodyne/lidar topic names for your rosbag data. Note you'll also need to update the camera intrinsic parameters and camera-lidar calibration parameters to get good results (see lines 94-107 of write_ldls_bag.py)

Please see the msg/Segmentation.msg file for specification of the output Segmentation message type, which includes labeled points for detected object instances.