2DT conical wavelet with high aperture selectivity for directional speed capture in video sequences

Cauchy and conical wavelets have been constructed as a response to the lack of aperture selectivity of the Morlet wavelet. Furthermore, they allow a very simple adjustment of their angular selectivity. On the other hand, the Morlet wavelet has been tuned to speed in the 90s by Duval-Destin and its efficiency has been demonstrated for psychovisual analysis. It has also been used in a powerful aerial target tracking algorithm by Mujica. These two interesting developments have been used here to build a new, highly directional, speed-tuned wavelet called Gaussian-conical Morlet(GCM). Like the Morlet wavelet, it presents very good characteristics in motion estimation and tracking, namely, long temporal dependence, robustness to noise and to occlusions. But for aperture selectivity and directional speed-capture, GCM easily outperforms Morlet. This paper describes the GCM construction, utilization and aperture performances

2DT Conical Wavelet With High Aperture-Selectivity For Directional Speed Capture In Video Sequences

International audienceCauchy and conical wavelets have been constructed as a response to the lack of aperture selectivity of the Morlet wavelet [1, 2]. Furthermore, they allow a very simple adjustment of their angular selectivity. On the other hand, the Morlet wavelet has been tuned to speed in the 90s [7] and its efficiency has been demonstrated for psychovisual analysis. It has also been used in a powerful aerial target tracking algorithm in [10]. These two interesting developments have been used here to build a new, highly directional, speed-tuned wavelet called Gaussian-conical Morlet (GCM). Like the Morlet wavelet, it presents very good characteristics in motion estimation and tracking, namely, long temporal dependence, robustness to noise and to occlusions. But for aperture selectivity and directional speed-capture, GCM easily outperforms Morlet. This paper describes the GCM construction, utilization and aperture performances

2DT Conical Wavelet With High Aperture-Selectivity For Directional Speed Capture In Video Sequences

International audienceCauchy and conical wavelets have been constructed as a response to the lack of aperture selectivity of the Morlet wavelet [1, 2]. Furthermore, they allow a very simple adjustment of their angular selectivity. On the other hand, the Morlet wavelet has been tuned to speed in the 90s [7] and its efficiency has been demonstrated for psychovisual analysis. It has also been used in a powerful aerial target tracking algorithm in [10]. These two interesting developments have been used here to build a new, highly directional, speed-tuned wavelet called Gaussian-conical Morlet (GCM). Like the Morlet wavelet, it presents very good characteristics in motion estimation and tracking, namely, long temporal dependence, robustness to noise and to occlusions. But for aperture selectivity and directional speed-capture, GCM easily outperforms Morlet. This paper describes the GCM construction, utilization and aperture performances

11th International Coral Reef Symposium Proceedings

A defining theme of the 11th International Coral Reef Symposium was that the news for coral reef ecosystems are far from encouraging. Climate change happens now much faster than in an ice-age transition, and coral reefs continue to suffer fever-high temperatures as well as sour ocean conditions. Corals may be falling behind, and there appears to be no special silver bullet remedy. Nevertheless, there are hopeful signs that we should not despair. Reef ecosystems respond vigorously to protective measures and alleviation of stress. For concerned scientists, managers, conservationists, stakeholders, students, and citizens, there is a great role to play in continuing to report on the extreme threat that climate change represents to earth’s natural systems. Urgent action is needed to reduce CO2 emissions. In the interim, we can and must buy time for coral reefs through increased protection from sewage, sediment, pollutants, overfishing, development, and other stressors, all of which we know can damage coral health. The time to act is now. The canary in the coral-coal mine is dead, but we still have time to save the miners. We need effective management rooted in solid interdisciplinary science and coupled with stakeholder buy in, working at local, regional, and international scales alongside global efforts to give reefs a chance.https://nsuworks.nova.edu/occ_icrs/1000/thumbnail.jp