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This paper describes acoustic and visual instruments developed to perform high resolution surveys of manganese crusts. The instruments consist of an acoustic device developed to perform in situ measurements of manganese crust thickness at depths of up to 3000m, and a vision based mapping system that generates three-dimensional colour reconstructions of the sea floor. The developed systems operate...
We develop a new perspective invariant feature space representation of remotely sensed objects, regarding the features themselves as primitive observables of the 3D objects and to estimate them from multiple sensor measurements. This is formulated as an inverse problem in the feature coefficients. Once the coefficients are estimated they may be used to derive higher level features used by machine...
The 2010 Yushu earthquake caused tremendous life and economic loss in Yushu county, Qinghai, China. More than hundred thousand buildings were totally or partially collapsed. This paper focuses on the 3D visualization of disaster environment in both coarse scale and fine scale for further disaster management. In the study area, different data resources were used in different scales for different purpose...
This paper presents an application of using geo-data from Lidar and GPS/IMU to detect overpasses. Three characteristics make it a good example of processing large point sets in real-time: a stream paradigm that exploits system parallelism and memory-access coherence, a multi-level detection strategy that distributes computational burden across different operations, and a multi-resolution data structure...
Visual surveys of the seafloor are often performed by robotic underwater vehicles and a number of methods exists for transforming photos or video into 2D or 3D reconstructions, most of which utilise navigation data. Laser profiling is a method that is widely used for bathymetry mapping with high vertical resolution, but typically no information of the actual colour is obtained. In this paper we propose...
In order to improve the visualization effects of some areas in cyber city, it's often required to reconstruct 3D model of city statues. In this paper, we present a pipeline to build 3D city statue model of high fidelity that fusing multi-resolution LIDAR data and high-resolution digital images. Firstly, the classic ICP algorithm is used to register multi-resolution LIDAR data. Secondly, the geometric...
This paper presents an original development of disparity estimation from stereo couples primarily based on the similarity of image gradient between both images. Each pixel of the left image is associated to right image pixels with same gradient and similar intensity, directly leading to a set of disparities equal to the horizontal displacement in the specific case of epipolar images. Disparity values...
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