Results 1 - 10 of 109

BIOINFORMATICS INSPIRED ALGORITHM FOR STEREO CORRESPONDENCE

by Romain Dieny, Jerome Thevenon, Jesus Martinez-del-rincon, Jean-christophe Nebel
"... Stereo correspondence, dynamics programming, sequence alignment, bioinformatics, parameter estimation. In this paper, we exploit the analogy between protein sequence alignment and image pair correspondence to design a bioinformatics-inspired framework for stereo matching based on dynamic programming ..."
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and quantitatively using a standard benchmarking dataset and by conducting stereo matching experiments between images captured at different resolutions. Results confirm the validity of the computer vision/bioinformatics analogy to develop a versatile and accurate low complexity stereo matching algorithm. 1

A Layered Stereo Matching Algorithm using Image Segmentation and Global Visibility Constraints,”

by Michael Bleyer , Margrit Gelautz - ISPRS Journal of Photogrammetry and Remote Sensing, , 2005
"... Abstract This work describes a stereo algorithm that takes advantage of image segmentation, assuming that disparity varies smoothly inside a segment of homogeneous colour and depth discontinuities coincide with segment borders. Image segmentation allows our method to generate correct disparity esti ..."
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extraction and assignment are alternately applied. Qualitative and quantitative results obtained for benchmark image pairs show that the proposed algorithm outperforms most state-of-the-art matching algorithms currently listed on the Middlebury stereo evaluation website. The technique achieves particularly

A correlation-based model prior for stereo

by Yanghai Tsin, Takeo Kanade - In Int. Conf. on Computer Vision and Pattern Recognition
"... All non-trivial stereo problems need model priors to deal with ambiguities and noise perturbations. To meet requirements of increasingly demanding tasks such as modeling for rendering, a proper model prior should impose preference on the true scene structure, while avoiding artificial bias such as f ..."
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in renderable, very smooth and accurate depth map. The results are evaluated both qualitatively by view synthesis and quantitatively by error analysis. 1.

Limiting the Search Range of Correlation Stereo Using Silhouettes

by Geoffrey Egnal , Max Mintz, Kostas Daniilidis
"... We present a new approach to combine two approaches to three-dimensional reconstruction: silhouette-based and correspondence-based approaches. The two approaches have complementary costs and benefits. Silhouette-based approaches deliver volumetric descriptions which often have very few outliers, but ..."
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specific implementation uses the silhouette reconstruction as prior data to center and bound a stereo search process. We explore the different performance characteristics of the combination and its two component methods qualitatively and quantitatively using real imagery.

Spatiotemporal oriented energies for spacetime stereo

by Mikhail Sizintsev, Richard P. Wildes - In ICCV , 2011
"... This paper presents a novel approach to recovering tem-porally coherent estimates of 3D structure of a dynamic scene from a sequence of binocular stereo images. The approach is based on matching spatiotemporal orientation distributions between left and right temporal image streams, which encapsulate ..."
Abstract - Cited by 4 (1 self) - Add to MetaCart
This paper presents a novel approach to recovering tem-porally coherent estimates of 3D structure of a dynamic scene from a sequence of binocular stereo images. The approach is based on matching spatiotemporal orientation distributions between left and right temporal image streams, which

Quasi-dense 3D reconstruction using tensor-based multiview stereo

by Tai-pang Wu, Sai-kit Yeung, Jiaya Jia, Chi-keung Tang - Institute, University Medical Center Utrecht, Netherlands , 2010
"... We propose tensor-based multiview stereo (TMVS) for quasi-dense 3D reconstruction from uncalibrated images. Our work is inspired by the patch-based multiview stereo (PMVS), a state-of-the-art technique in multiview stereo reconstruction. The effectiveness of PMVS is attributed to the use of 3D patch ..."
Abstract - Cited by 4 (1 self) - Add to MetaCart
in MVS via the use of 3D tensors, where our closed-form solution to tensor voting provides a unified approach to implement the matchpropagate-filter pipeline. Using PMVS as the implementation backbone where TMVS is built, we provide qualitative and quantitative evaluation to demonstrate how TMVS

Evaluating Retina Image Fusion Based on Quantitative Approaches

by Zhengmao Ye, Hua Cao, Sitharama Iyengar, Habib Mohamadian
"... Abstract:- Image registration and fusion are conducted using an automated approach, which applies the automatic adaptation from frame to frame with the threshold parameters. Rather than qualitative approach, quantitative measures have been proposed to evaluate outcomes of retina image fusion. Concep ..."
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Abstract:- Image registration and fusion are conducted using an automated approach, which applies the automatic adaptation from frame to frame with the threshold parameters. Rather than qualitative approach, quantitative measures have been proposed to evaluate outcomes of retina image fusion

Autonomous Landing of an UAV with a Ground-Based Actuated Infrared Stereo Vision System

by Weiwei Kong, Daibing Zhang, Xun Wang, Zhiwen Xian, Jianwei Zhang
"... Abstract — In this study, we focus on how to land an un-manned aerial vehicle (UAV) in unknown and GPS-denied environments based on an infrared stereo vision system. The vision system is fixed on the ground and used to track the UAV’s position during the landing process. In order to enlarge the sear ..."
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quadrotor and a fixed-wing unmanned aircraft, with both qualitative and quantitative evaluations. The results demonstrate that our system can track UAVs without artificial markers and is sufficient to complement for or replace the GPS-based localization in GPS-denied environment or where its information

QUALITE DES MODELES NUMERIQUES DE TERRAIN DERVIES PAR CORRELATION AUTOMATIQUE

by M. Ettarid, H. Hadfat, A. Zaza, A. Khaldi
"... Digital Terrain Models are plying an important role as information layer, mainly with the development of geographic information systems, since they describe the topographic surface of the terrain and hence it constitutes a valuable support for the study of variety of geographical and environmental e ..."
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scanned to 20, 25, 32 and 42 microns pixel sizes and digital terrain models were derived using ViruoZo software from Supresoft. The assessment of the derived DTMs quality was based on qualitative (visual comparisons of contours) and quantitative ( RMS computed from residuals on ground check points

Implementation and Comparison of Four Different Boundary Detection Algorithms for Quantitative Ultrasonic Measurements of the

by Human Carotid Artery, T. Gustavsson, R. Abu-gharbieh, G. Hamarneh, Q. Liang
"... In this paper we examine four algorithms for automated ultrasonic boundary detection, and describe the application of these algorithms to the quantification of the intima-media thickness (IMT) in the human carotid artery. The first algorithm uses a dynamic programming approach to identify the bounda ..."
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representing the intensity profile across a boundary and applying a matched filter procedure to find the image region that best matches it. We also present a quantitative and qualitative comparison between the four algorithms examined. It is shown that the dynamic programming algorithm provides superior
Results 1 - 10 of 109