Filter results

Results (108)

Sort by:

Select all Select all

Page 1

Marco Munderloh - Detection of Moving Objects for Aerial Surveillance of Arbitrary Terrain

Partial access

Select

Marco Munderloh

Detection of Moving Objects for Aerial Surveillance of Arbitrary Terrain

Series: Informatik/ Kommunikation

Volume 847 2016

Results in this title

Introduction S. 1-9

„… . something is moving in a specific area, unusual behavior of people, or abandoned objects. In a static camera …” „… background is not static anymore but changes with the camera movement. To cope with this, a global motion …” „… frames directly to generate a quasi-static camera scenario for background subtraction algorithms. Herby …”

Planar Landscape Error Model S. 34-57

„… different camera positions The previous examination was only done for the static case (a single vertical …” „… motion error with a non-tilted camera is independent of the ground position P0 but dependent on the …” „… non-linear if the camera is tilted. In this first step, only a rotation around the Y-axis by an angle θ is …”

Titelei/Inhaltsverzeichnis S. I-XII

„… environmental monitoring. The challenge is the non-static camera, which is moving together with an aerial …” „… non-static camera which is attached to and moves together with an aerial vehicle. To be able to detect local …” „… . Keywords: Aerial Surveillance – Motion Detection – Motion Segmentation – Non-planar Motion Compensation …”

Experiments S. 73-92

„… buildings and non-static motion such as moving objects or false tracks on a feature basis. The feature …” „… , changes of locally moving objects are still visible. This enables the usage of static camera based motion …” „… detection algorithms within a moving camera setup. The performance of the static motion detection algorithms …”

Basic Principles S. 10-33

„… correspondences result from non-planar static objects and that the camera translation between the frames is large …” „… into n on the image plane in image coordinates. In this work, a non-distorting camera lens is assumed …” „… be compensated prior to computing the model. This allows (within limits) static camera motion …”

Summary and Conclusions S. 93-96

„… non-tilted camera, the relief displacement increases mostly with the angle, except for larger distances of …” „… on a static camera scenario which was not possible with the state-of-the-art homography model due to …” „… cluster filter does not require calibrated cameras or the positions of the camera during recording …”

Multi-Planar Landscape Model based on Triangle Meshes S. 58-72

„… suppress the relief displacements of non-planar ground structure during motion compensation for the use in …” „… camera center (different heights from the ground plane). The best possible solution to construct the mesh …” „… displacements are extrapolated from known feature displacements nearby. This can be done by a (non …”

doi.org/10.51202/9783186847102

Sascha Steyer - Grid-Based Object Tracking

Partial access

Select

Sascha Steyer

Grid-Based Object Tracking

Series: Mess-, Steuerungs- und Regelungstechnik

Volume 1272 2021

Results in this title

Dynamic Grid Mapping and Particle Tracking S. 39-78

„… radar- and camera-specific measurements for improving the static/dynamic occupancy classification as …” „… camera measurement data are not evaluated in detail for improving the static/dynamic occupancy …” „… camera classification accuracy of the corresponding class. The first group Kstatic of static classes …”

Evaluation S. 127-164

„… . Note that for the camera classification, the static environment is based on the detection 142 6.2 …” „… velocity information. (d) Results with camera classification (top: only static obstacles, bottom: camera …” „… modeled as part of the static environment. This is further discussed in the next scenario. If no camera …”

Conclusion S. 165-168

„… camera sensors further improves the static/dynamic occupancy differentiation as well as the object …” „… camera-detected pedestrians and cyclists due to their generally high dynamic and vulnerability, but also for the …” „… environment model is required that properly represents moving objects, static obstacles, and passable …”

Introduction S. 1-12

„… guardrails or buildings? For large static obstacles, in particular when they are curved or non-convex, an …” „… measurements, camera-based object detection methods require semantic image processing with class-specific …” „… measurement data of different kinds of sensors, in particular the three types lidar, radar, and camera, to …”

Measurement Grid Representation and Fusion S. 13-38

„… classification strategy is directly applied for the camera-based obstacle detections of the static environment …” „… classification grid of static detections (red cells). (h) Camera classification grid of objects with additional …” „… . The camera classification information of both the static detections, only available in the front area …”

Titelei/Inhaltsverzeichnis S. I-XII

„… - and Camera-Based Occupancy Classification . . 58 3.4.4 Adapted Occupancy Convergence by Object …” „… Occupancy-Based Number of Desired Particles . . . . . . 64 3.5.2 Radar- and Camera-Based Particle Velocity …” „… combines tracking moving objects and mapping the static environment. The basic idea is to fuse and …”

Object Extraction and Association S. 79-100

„… environments including a differentiation of static and dynamic occupancy. The applied particlebased estimation …” „… objects thereby have to be extracted from different sensor data, such as camera images, range-based …” „… object detection or abstraction. In this work, measurement data of lidar, radar, and camera are modeled …”

Object State Estimation S. 101-126

„… radar velocity measurements and camera classification information are evaluated to further improve the …” „… Bayes classifier. Thereby the histogram-based representation enables to model non-Gaussian distributions …” „… and no static/dynamic classification is used. The object shape can also be estimated using an object …”

Bibliography S. 170-186

„… . Velocity and shape from tightly-coupled LiDAR and camera. In Proc. IEEE Intell. Veh. Symp., pages 60–67 …” „… Systems and Control, pages 411–413. Springer London, London, 2015. [33] P. Del Moral. Non-linear filtering …” „… . Danzer, and K. Dietmayer. Fusion of laser and monocular camera data in object grid maps for vehicle …”

doi.org/10.51202/9783186272089

Holger Meuel - Analysis of Affine Motion Compensated Prediction and its Application in Aerial Video Coding

Partial access

Select

Holger Meuel

Analysis of Affine Motion Compensated Prediction and its Application in Aerial Video Coding

Series: Informatik/ Kommunikation

Volume 865 2019

Results in this title

ROI-based System for Low Bit Rate Coding of Aerial Videos S. 65-86

„… non-ROI areas (static background) of the scene [75, 79], e. g. in a mosaic (Section 4.4) or in a …” „… camera-plane onto a projection plane. If prede ned thresholds are not reached, the feature positions are …” „… Video Reconstruction from ROI-Encoded Videos 85 (a) Mosaic generated from the camera-captured video …”

Basics S. 11-36

„… ed camera and lens model [90]. and description of [90], the non-linear projection between the …” „… applied. If the camera is not static as assumed in the previously mentioned approaches, the ego-motion of …” „… the camera center C in world coordinates [90]. 2.2 Camera Model 13 2.2 CameraModel ¿e camera model in …”

Introduction S. 1-10

„… based methods like [31] can be applied only for known cameras. In aerial surveillance, the camera type …” „… Sample Consensus (RANSAC) for noise robustness of camera-captured signals [61]. However, for image …” „… upcoming camera sensors (4K and above), the demand for multiple or multi-view video streams, and the …”

doi.org/10.51202/9783186865106

Thomas Guthier - Visual Motion Processing

Partial access

Select

Thomas Guthier

Visual Motion Processing

Series: Mess-, Steuerungs- und Regelungstechnik

Volume 1251 2016

Results in this title

Conclusion S. 126-131

„… chapter 3, with its focus on a direction selective, strict non-negative representation, sparse activations …” „… and inhibition. The basic idea, that the non-negativity constraints results in meaningful, thus …” „… decomposition. 128 7 Conclusion Following the idea of a non-negative, sparse, direction-selective …”

Human Action Recognition S. 116-125

„… a static camera and no view-point variations and the actions are performed by the different persons …” „… . The influence of the two feature types, i.e. the static (gradient amplitude) and dynamic (optical flow …” „… [88]. calculated with the correlation method eq. (5.4) including the non-linear refinement eq. (5.6 …”

doi.org/10.51202/9783186251084

Timo von Marcard - Human Motion Capture with Sparse Inertial Sensors and Video

Partial access

Select

Timo von Marcard

Human Motion Capture with Sparse Inertial Sensors and Video

Series: Informatik/ Kommunikation

Volume 866 2020

Results in this title

Titelei/Inhaltsverzeichnis S. I-XII

„… : Human Pose Estimation – Inertial Sensors – Video – Non-static Camera – Modelbased Optimization – Sparse …” „… , Inertial Sensors, Video, Non-static Camera, Model-based Optimization, Sparse Sensors X Kurzfassung Diese …” „… with a small number of sensors. Conventional methods either use a large number of static cameras, which …”

Introduction S. 5-21

„… the static 3D point coordinates and the temporally varying rigid body motion of a single camera …” „… improves IMU-based motion capture using sparse visual information, rather than extending a static camera …” „… Cameras Multi-camera approaches recover the depth information by using a set of cameras to triangulate the …”

Video Inertial Poser S. 74-102

„… rigidly mounted to the building and are not equipped with an IMU. Hence we assume a static camera with …” „… in the wild. Previous methods rely on multiple static cameras, which limits the operational area and …” „… camera. Using multiple cameras requires time consuming set-up and calibration [88]. Most importantly, the …”

Sparse Inertial Poser S. 49-73

„… less accurate than motion capture systems. A common limitation of all camera-based systems is that they …” „… typically involves multi-camera calibrated systems, which again limit applicability. Also, methods for …” „… occlusions, baggy clothing or where tracking with a dedicated camera is simply not possible. However …”

Fundamentals S. 22-48

„… external camera parameters as well as radial distortion coefficients [71]. To synchronize the cameras with …” „… subjects, respectively. The dataset is recorded using eight calibrated, static RGB-cameras and 13 IMUs …” „… point of the human body moves over time t. However, due to the complex and non-rigid structure of the …”

doi.org/10.51202/9783186866103

1

2 3 ... 22