As part of the research activities of DFKI Augmented Vision in the VIZTA project (https://www.vizta-ecsel.eu/), we have published the open-source dataset for automotive in-cabin monitoring with a wide-angle time-of-flight depth sensor. The TiCAM dataset represents a variety of in-car person behavior scenarios and is annotated with 2D/3D bounding boxes, segmentation masks and person activity labels. The dataset is available here https://vizta-tof.kl.dfki.de/. The publication describing the dataset in detail is available as a preprint here: https://arxiv.org/pdf/2103.11719.pdf
We are delighted to announce that our paper “PlaneSegNet: Fast and Robust Plane Estimation Using a Single-stage Instance Segmentation CNN” has been accepted for publication at the ICRA 2021 IEEE International Conference on Robotics and Automation which will take place from May 30 to June 5, 2021 at Xi’an, China.
Abstract: Instance segmentation of planar regions in indoor scenes benefits visual SLAM and other applications such as augmented reality (AR) where scene understanding is required. Existing methods built upon two-stage frameworks show satisfactory accuracy but are limited by low frame rates. In this work, we propose a real-time deep neural architecture that estimates piece-wise planar regions from a single RGB image. Our model employs a variant of a fast single-stage CNN architecture to segment plane instances. Considering the particularity of the target detected, we propose Fast Feature Non-maximum Suppression (FF-NMS) to reduce the suppression errors resulted from overlapping bounding boxes of planes. We also utilize a Residual Feature Augmentation module in the Feature Pyramid Network (FPN) . Our method achieves significantly higher frame-rates and comparable segmentation accuracy against two-stage methods. We automatically label over 70,000 images as ground truth from the Stanford 2D-3D-Semantics dataset. Moreover, we incorporate our method with a state-of-the-art planar SLAM and validate its benefits.
On March 4th, 2021, Dr. Jason Rambach gave a talk on Machine Learning and Computer Vision at the GIZ (Deutsche Gesellschaft für Internationale Zusammenarbeit) workshop on Machine Learning and Computer Vision for Earth Observation organized by the DFKI MLT department. In the talk, the foundations of Computer Vision, Machine Learning and Deep Learning as well as current Research and Implementation challenges were presented.
DFKI participates in the VIZTA project, coordinated by ST Micrelectronics, aiming at developing innovative technologies in the field of optical sensors and laser sources for short to long-range 3D-imaging and to demonstrate their value in several key applications including automotive, security, smart buildings, mobile robotics for smart cities, and industry4.0. The 18-month public summary of the project was released, including updates from DFKI Augmented Vision on time-of-flight camera dataset recording and deep learning algorithm development for car in-cabin monitoring and smart building person counting and anomaly detection applications.
Please click here to check out the complete summary.
We are excited to announce that the Augmented Vision group will present 3 papers in the upcoming VISAPP 2021 Conference, February 8th-10th, 2021:
The International Conference on Computer Vision Theory and Applications (VISAPP) is part of VISIGRAPP, the 16th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications. VISAPP aims at becoming a major point of contact between researchers, engineers and practitioners on the area of computer vision application systems. Homepage: http://www.visapp.visigrapp.org/
The 3 accepted papers are:
1. An Adversarial Training based Framework for Depth Domain Adaptation
Jigyasa Singh Katrolia, Lars Krämer, Jason Raphael Rambach, Bruno Mirbach, Didier Stricker
One sentence summary: The paper presents a GAN-based method for domain adaptation between depth images.
2. OFFSED: Off-Road Semantic Segmentation Dataset
Peter Neigel, Jason Raphael Rambach, Didier Stricker
One sentence summary: A dataset for semantic segmentation in off-road scenes for automotive applications is made publically available.
3. SALT: A Semi-automatic Labeling Tool for RGB-D Video Sequences
Dennis Stumpf, Stephan Krauß, Gerd Reis, Oliver Wasenmüller, Didier Stricker
One sentence summary: SALT proposes a simple and effective tool to facilitate the annotation process for segmentation and detection ground truth data in RGB-D video sequences.
We are happy to announce that our paper “SynPo-Net–Accurate and Fast CNN-Based 6DoF Object Pose Estimation Using Synthetic Training” has been accepted for publication at the MDPI Sensors journal, Special Issue Object Tracking and Motion Analysis. Sensors (ISSN 1424-8220; CODEN: SENSC9) is the leading international peer-reviewed open access journal on the science and technology of sensors.
Abstract: Estimation and
tracking of 6DoF poses of objects in images is a challenging problem of great
importance for robotic interaction and augmented reality. Recent approaches
applying deep neural networks for pose estimation have shown encouraging
results. However, most of them rely on training with real images of objects
with severe limitations concerning ground truth pose acquisition, full coverage
of possible poses, and training dataset scaling and generalization capability.
This paper presents a novel approach using a Convolutional Neural Network (CNN)
trained exclusively on single-channel Synthetic images of objects to regress
6DoF object Poses directly (SynPo-Net). The proposed SynPo-Net is a network
architecture specifically designed for pose regression and a proposed domain
adaptation scheme transforming real and synthetic images into an intermediate
domain that is better fit for establishing correspondences. The extensive
evaluation shows that our approach significantly outperforms the
state-of-the-art using synthetic training in terms of both accuracy and speed.
Our system can be used to estimate the 6DoF pose from a single frame, or be
integrated into a tracking system to provide the initial pose.
Authors: Yongzhi Su, Jason Raphael Rambach, Alain Pagani, Didier Stricker
The Winter Conference on Applications of Computer Vision (WACV 2021) is IEEE’s and the PAMI-TC’s premier meeting on applications of computer vision. With its high quality and low cost, it provides an exceptional value for students, academics and industry researchers. In 2021, the conference is organized as a virtual online event from January 5th till 9th, 2021.
The four accepted papers are:
1. SSGP: Sparse Spatial Guided Propagation for Robust and Generic Interpolation
René Schuster, Oliver Wasenmüller, Christian Unger, Didier Stricker
Q/A Session: Oral 1B, January 6th, 7 pm CET.
2. A Deep Temporal Fusion Framework for Scene Flow Using a Learnable Motion Model and Occlusions
René Schuster, Christian Unger, Didier Stricker
Q/A Session: Oral 1C, January 6th, 7 pm CET.
Abstract: This paper demonstrates a system capable of combining a sparse, indirect, monocular visual SLAM, with both offline and real-time Multi-View Stereo (MVS) reconstruction algorithms. This combination overcomes many obstacles encountered by autonomous vehicles or robots employed in agricultural environments, such as overly repetitive patterns, need for very detailed reconstructions, and abrupt movements caused by uneven roads. Furthermore, the use of a monocular SLAM makes our system much easier to integrate with an existing device, as we do not rely on a LiDAR (which is expensive and power consuming), or stereo camera (whose calibration is sensitive to external perturbation e.g. camera being displaced). To the best of our knowledge, this paper presents the first evaluation results for monocular SLAM, and our work further explores unsupervised depth estimation on this specific application scenario by simulating RGB-D SLAM to tackle the scale ambiguity, and shows our approach produces econstructions that are helpful to various agricultural tasks. Moreover, we highlight that our experiments provide meaningful insight to improve monocular SLAM systems under agricultural settings.
Abstract: Images recorded during the lifetime of computer vision based systems undergo a wide range of illumination and environmental conditions affecting the reliability of previously trained machine learning models. Image normalization is hence a valuable preprocessing component to enhance the models’ robustness. To this end, we introduce a new strategy for the cost function formulation of encoder-decoder networks to average out all the unimportant information in the input images (e.g. environmental features and illumination changes) to focus on the reconstruction of the salient features (e.g. class instances). Our method exploits the availability of identical sceneries under different illumination and environmental conditions for which we formulate a partially impossible reconstruction target: the input image will not convey enough information to reconstruct the target in its entirety. Its applicability is assessed on three publicly available datasets. We combine the triplet loss as a regularizer in the latent space representation and a nearest neighbour search to improve the generalization to unseen illuminations and class instances. The importance of the aforementioned post-processing is highlighted on an automotive application. To this end, we release a synthetic dataset of sceneries from three different passenger compartments where each scenery is rendered under ten different illumination and environmental conditions: https://sviro.kl.dfki.de