week 5 summaries [Aurelien Bonnafont]
Kinectfusion; real time 3D Reconstruction and Interaction using a Moving Depth Camera
This article deals with the kinectfusion camera which recreates real 3D object quickly and with low cost. Compare to the other system kinect fusion is supporting both real time tracking and reconstruction, is faster, more accurate, infrastructure less and allow interaction of objects with the scene.
This system enables users to reconstruct the scene and accurately segment a small object of the scene. Furthermore the interaction of the objects with the scene or peoples can be compute and this provides a rendering very close to the reality.
To perform the system computes the position of particules (voxel), and the GPU compute the collision between the moving particules to render the interaction of objects.
The Kinect fusion provides also a way to detect and compute moving people in a static background and completely represent dynamic scenes.
A Motion-Stabilized Outdoor Augmented reality system
Built outdoor application is hard. Many AR systems for indoor purposes have been developed, but outdoor AR systems can provide location in the real world instead of just looking on a map. But outdoor tracking systems face the limitations of environment control, energy, and changing light.
This article explain how use several sensors to perform a good outdoor AR. The system described use one sensor for positioning and two other sensors for the orientation. The sensors and gyroscopes need to be calibrated since the local magnetic field’s earth distortion and the gyroscope bias. A sensor fusion estimate the head orientation from the input of the TCM2 and 3 gyroscopes, the position is extrapolated in the future, since the head is rotating, to get the right image. For a rendering of 60 Hz update, the threads which execute it, need to have high priority. The rendering is made with OPENGL, DirectDraw and frame buffer management.
The system was tested in different environments, with moderate head rotation it is relatively accurate but when near metal sources the compass drift with time. To see the effects of each component, 3 different modes are tried. The use with all the component give better result.
This system has proven its efficiency but still heavy and large, more over we need a system which can function longer and in bigger land
Comments are closed.