Round 1: Completed

# TartanAir Visual SLAM - Mono Track

Visual SLAM in challenging environments

2500 Prize Money
8497
120
3
203

## TartanAir Visual SLAM Challenge - Monocular Track

Welcome to TartanAir Visual SLAM (Simultaneous Localization and Mapping) Challenge, one of the official challenges in the CVPR 2020 SLAM workshop. This benchmark focuses on the SLAM problem in environments with challenging features such as changing light conditions, low illumination, adverse weather, and dynamic objects.

The CVPR Visual SLAM challenge consists of the monocular track and the stereo track. Each track contains 16 trajectories, which is further divided into easy and hard categories. We also provide a large set of training data collected in 18 different environments with multiple ground truth labels including camera pose, disparity, segmentation, and optical flow.

## TartanAir Dataset

This benchmark is based on the TartanAir dataset, which is collected in photo-realistic simulation environments based on the AirSim project. A special goal of this dataset is to focus on the challenging environments with changing light conditions, adverse weather, and dynamic objects. The four most important features of our dataset are:

• Large size diverse realistic data. We collect the data in diverse environments with different styles, covering indoor/outdoor, different weather, different seasons, urban/rural.
• Multimodal ground truth labels. We provide RGB stereo, depth, optical flow, and semantic segmentation images, which facilitates the training and evaluation of various visual SLAM methods.
• Diversity of motion patterns. The existing popular datasets such as KITTI and Cityscapes only cover very limited motion patterns, which are mostly moving straight forward plus small left or right turns. This regular motion is too simple to sufficiently test a visual SLAM algorithm. Our dataset covers much more diverse motion combinations in 3D space, which is significantly more difficult than existing datasets.
• Challenging Scenes. We include challenging scenes with difficult lighting conditions, day-night alternating, low illumination, weather effects (rain, snow, wind and fog) and seasonal changes.

## Get Started

Click here to download the testing data for the monocular track. (Size: 7.65 GB)
MD5 hash: 009b52e7d7b224ffb8a203db294ac9fb

File structure:

mono
|
--- ME000                             # monocular easy trajectory 0
|       |
|       ---- 000000.png          # RGB image 000000
|       ---- 000001.png          # RGB image 000001
|       .
|       .
|       ---- 000xxx.png           # RGB image 000xxx
|
+-- ME001                             # monocular easy trajectory 1
.
.
+-- ME007                            # monocular easy trajectory 7
|
+-- MH000                            # monocular hard trajectory 0
.
.
|
+-- MH007                            # monocular hard trajectory 7

3. (Optional) Training data.

There are two ways to access the training data.

4. Submit the results.

For each of the 16 trajectories (ME00X or MH00X) in the testing data, compute the camera poses, and save them in the text file with the name ME00X.txt or MH00X.txt. Put all 16 files into a zip file with the following structure:

FILENAME.zip
|
--- ME000.txt                             # result file for the trajectory ME000
--- ME001.txt                             # result file for the trajectory ME001
|          ..
|          ..
--- ME007.txt                             # result file for the trajectory ME007
|
--- MH000.txt                             # result file for the trajectory MH000
--- MH001.txt                             # result file for the trajectory MH001
|          ..
|          ..
--- MH007.txt                             # result file for the trajectory MH007

The camera pose file should have the same format as the ground truth file in the training data. It is a text file containing the translation and orientation of the camera in a fixed coordinate frame. Note that our automatic evaluation tool expects the estimated trajectory to be in this format.

• Each line in the text file contains a single pose.

• The number of lines/poses must be the same as the number of image frames in that trajectory.

• The format of each line is 'tx ty tz qx qy qz qw'.

• tx ty tz (3 floats) give the position of the optical center of the color camera with respect to the world origin in the world frame.

• qx qy qz qw (4 floats) give the orientation of the optical center of the color camera in the form of a unit quaternion with respect to the world frame.

• The trajectory can have an arbitrary initial position and orientation. However, we are using the NED frame to define the camera motion. That is to say, the x-axis is pointing to the camera's forward, the y-axis is pointing to the camera's right, the z-axis is pointing to the camera's downward.

## Evaluation Criteria

For a known ground truth trajectory ME000_gt.txt and an estimated trajectory ME000_est.txt, we calculate the translation and rotation error based on the normalized Relative Pose Error similar to the KITTI dataset. Different from KITTI, we compute translational and rotational errors for all possible subsequences of length (5, 10, 15, ...,40) meters.  The translational error and rotational error are then combined to the final score: $$E = {E_{rot} + \beta E_{trans} }$$ , where we use $$\beta=7$$ to balance the two errors, because the average rotation speed (in degree) is 7 times bigger than the average translation speed on our dataset.

Due to the scale ambiguity of the monocular image, a global scale factor is calculated before the error computation.

## Competition Tracks and Prizes

Monocular Track

• The prize for the winner:
• $1500 USD • The prize for the runner up:$1000 USD

Stereo Track

• The prize for the winner:
• $1500 USD • The prize for the runner up:$1000 USD

## Timeline

• Deadline of the submission: Aug 15th, 2020.
• Winners announcement: TBD