Direct positioning and data acquisition system, composed of global positioning system (GPS), inertial navigation system (INS), laser ranging technique and digital photogrammetry, is a fast data acquiring technique developed in the field of surveying and mapping in recent years. Focusing on data acquisition based on vehicle-borne mobile mapping system integrated with GPS/INS/CCD cameras, this pa...

Limits of stereo processing in photogrammetry using image matching techniques are often due to very low capabilities of those procedures regarding aspects of interpretation. For example, if matching aims at recovering terrain surface it would be very helpful to know whether the processed area belongs to an urban area, agricultural land, forest region or other thematic object classes. This is on...

At the heart of every stereo vision algorithm is a solution to the matching problem the problem of finding points in the right and left image that correspond to a single point in the real world. Applying assumptions regarding the epipolar rectification and color similarity between two frames is often not possible for real-world image capture systems, like those used rescue robots. More flexible...

An important research topic in image processing is stereo vision. The objective is to compute a 3-dimensional representation of some scenery from two 2-dimensional digital images. Constructing a 3-dimensional representation involves finding pairs of pixels from the two images which correspond to the same point in space. Several stereo matching algorithms are developed to find matching pairs. Hi...

Navigation Assistance for Visually Impaired (NAVI) is a vision substitute system designed to assist blind people for autonomous navigation. NAVI working concept is based on ‘image to sound’ conversion. The vision sensor, which is mounted on a sunglass, captures the image infront of blind user. NAVI processing unit processes the captured image and enhances the significant vision data by employin...

Due to the increasing costs of high resolution satellite image data with stereo capabilities, products like accurate DSMs are becoming attractive for more and more users and applications. The Japanese optical sensor ALOS/PRISM which was launched in January 2006 has stereo capabilities by providing a simultaneous acquired image triplet. We have published several results of our evaluation of the ...

Oriented lters are useful in many early vision and image processing tasks. One often needs to apply the same lter, rotated to di erent angles under adaptive control, or wishes to calculate the lter response at various orientations. We present an e cient architecture to synthesize lters of arbitrary orientations from linear combinations of basis lters, allowing one to adaptively \steer" a lter t...

In this paper, a computational optimized 3D reconstruction system for airborne image sequences is described and tested. The onboard system is designed to generate automatically and continuously the Digital Elevation Model (DEM) for large observation areas during the flight. The aim is to provide near real-time applications such as supporting rescue teams for prompt evaluation and timely reactio...

Stereoscopic analysis of target images is the primary and conventional method for photogrammetric 3D range data construction. For object detection in high resolution satellite images, it is advantageous if the processing method can exploit a stereo derived DEM so that the technique can be applied anywhere in the world. Central to this is the need for a very reliable stereo matching algorithm an...