[HTML][HTML] U-Th dated speleothem recorded geomagnetic excursions in the Lower Brunhes

…, G Mahieux, P Deschamps, Q Shao, D Kachi… - Scientific Reports, 2019 - nature.com
The study of geomagnetic excursions is key for understanding the behavior of the magnetic
field of the Earth. In this paper, we present the geomagnetic record in a 2.29-m-long …

Too much information: Does the internet dig too deep?

D Kachhi, MW Link - Journal of Advertising …, 2009 - journalofadvertisingresearch.com
A lot of attention has been focused on the array of digital measurement tools; relatively less
consideration has been given to people's acceptance of these devices. There is no limitation …

Validating respondents' identity in online samples

R Baker, C Miller, D Kachhi, K Lange… - Online Panel …, 2014 - Wiley Online Library
Despite the widespread use of online panels in contemporary survey research there remain
ongoing concerns that the incentivized nature of panels may encourage some people to go …

Obstacle detection in a road scene based on motion analysis

…, A Potelle, D Kachi-Akkouche - IEEE Transactions on …, 2004 - ieeexplore.ieee.org
… Our goal is to obtain a reliable 3-D shape of the road in order … In order to obtain a precise
3-D road reconstruction step for all … [6] demonstrate that the 3-D coordinates of an axial point of …

Spherical edge detector: Application to omnidirectional imaging

S Bigot, D Kachi, S Durand - … on Advanced Concepts for Intelligent Vision …, 2008 - Springer
In this paper, we present an efficient approach to detect edges in omnidirectional images. The
main problem with such images, is that resolution is very high in the periphery and poor in …

Robust obstacle detection with monocular vision based on motion analysis

…, D Kachi-Akkouche - IEEE Intelligent Vehicles …, 2004 - ieeexplore.ieee.org
This paper deals with the problem of obstacle detection from a single camera mounted on a
vehicle. We define an obstacle as any object that obstructs the vehicle's driving path. The …

An adapted block-matching method for optical flow estimation in catadioptric images

D Alouache, Z Ameur, D Kachi - 2014 International Conference …, 2014 - ieeexplore.ieee.org
Optical flow estimation is one of the basic problems in computer vision. It is largely discussed
in the case of perspective images. The omnidirectional cameras provide images with large …

Optical flow estimation in omnidirectional images using wavelet approach

…, D Kachi-Akkouche - 2003 Conference on …, 2003 - ieeexplore.ieee.org
The motion estimation computation in the image sequences is a significant problem in image
processing. Many researches were carried out on this subject in the image sequences with …

[PDF][PDF] Spherical image denoising and its application to omnidirectional imaging.

S Bigot, D Kachi, S Durand, EM Mouaddib - VISAPP (1), 2007 - scitepress.org
This paper addresses the problem of spherical image processing. Thanks to projective
geometry, the omnidirectional image can be presented as a function on sphere S2. The target …

Motion detection using wavelet analysis and hierarchical Markov models

C Demonceaux, D Kachi-Akkouche - International Workshop on Spatial …, 2004 - Springer
This paper deals with the motion detection problem. This issue is of key importance in many
application fields. To solve this problem, we compute the dominant motion in the sequence …