This paper presents a practical epipolarity model for high-resolution linear pushbroom satellite images acquired in either along-track or cross-track mode, based on the projection reference plane in object space. A new method for epipolar resampling of satellite stereo imagery based on this model is then developed. In this method, the pixel-to-pixel relationship between the original image and t...

The key contribution of this paper is a novel submapping technique for RGB-D-based bundle adjustment. Our approach significantly speeds up 3D object reconstruction with respect to full bundle adjustment while generating visually compelling 3D models of high metric accuracy. While submapping has been explored previously for mono and stereo cameras, we are the first to transfer and adapt this con...

This paper presents a novel concept of real-time catadioptric stereo tracking using a single ultrafast mirror-drive pan-tilt active vision system that can simultaneously switch between hundreds of different views in a second. By accelerating video-shooting, computation, and actuation at the millisecond-granularity level for time-division multithreaded processing in ultrafast gaze control, the a...

Introduction: In this abstract we report on our initial experiences performing stereotopographic mapping of Mars with high-resolution images from the Mars Global Surveyor Mars Orbiter Camera Narrow-Angle subsystem (MGS MOC-NA; [1]). Accurate topog-raphic information, and, in particular, high-resolution digital elevation models (DEMs) are of intense interest at all phases of Mars exploration and...

Recently the 3D-MATIC Research Laboratory has developed techniques for the generation of 25 3D models per second of captured data. Our aim is to use these series of 3D models to study deformations of the human body. However since the 3D models have different topologies, they cannot be used directly for analyses of non-rigid motions. Therefore the generation of range flows is a prerequisite to f...

The registration and geometric recti cation of airborne scanner imagery is an essential prerequisite for the processing and analysis of this type of images. The Digital Photogrammetric Assembly (DPA) is an airborne camera consisting of three pan-chromatic line arrays for stereo imaging and four line arrays for multi-spectral imaging. For georeferencing the sensor system is completed by a module...

Here, a TMS320C6416 DSK board is integrated with two CMOS color image sensors to construct a new stereovision platform instead of current PC based or multi-CPU combination structures for detecting moving objects. A novel moving object detecting strategy is proposed by combining the image temporal differencing and the sum of absolute difference (SAD) matching schemes. This system can detect and ...

OBJECTIVE To measure and compensate for soft tissue deformation during image-guided neurosurgery, we have developed a novel approach to estimate the three-dimensional (3-D) topology of the cortical surface and track its motion over time. METHODS We use stereopsis to estimate the 3-D cortical topology during neurosurgical procedures. To facilitate this process, two charge-coupled device camera...

This paper presents a marker free computer vision based system for tracking the articulated movement of hands in order to measure surgical skill. Tracking is achieved with a fast level set evolution method for active contours based on edge information. The spatial positions of anatomical features like the middle of the arm and of the wrist are computed from stereo images. Our first measurements...