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Your search keyword '"Wang, Yike"' showing total 15 results
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15 results on '"Wang, Yike"'

7. Edge selection on gradients based on dome extraction

Author

Cai Shijie, Wang Yike, Zhang Xi-Wen, and Dou Wanchun

Subjects
business.industry, Computation, Iterative reconstruction, Grayscale, Deriche edge detector, Edge detection, Dome (geology), Canny edge detector, Computer vision, Artificial intelligence, business, Algorithm, Image gradient, Mathematics
Abstract

The phenomenon of multiple responses to a single edge often occurs in detecting noisy ramp edges. This paper investigates three properties of dome extracted by grayscale reconstruction and then presents a novel approach to select edges from gradients suppressing the multiplicity of response. The approach extracts domes in gradients, and then threshold them to get edges. Its computation time and memory requirements are not more than the nonmaxima suppression algorithm obviously. Experiment results show that our approach suppresses the multiplicity of response effectively.

Published
2005

14. Time-Spectrum Consecutiveness Based Scheduling With Advance Reservation in Elastic Optical Networks.

Author

Chen, Haoran, Zhao, Yongli, Zhang, Jie, He, Ruiying, Wang, Wei, Wu, Jialin, Wang, Yike, Ji, Yuefeng, Zheng, Haomian, Lin, Yi, and Hou, Baogang

Abstract

Novel advance reservation (AR) requests, such as user data replication and grid computing, which are different from immediate reservation requests, allow certain initial-delay during setting up, as long as the resources are allocated before a preset deadline. Empowered by the optical orthogonal frequency-division multiplexing (O-OFDM) technology, the elastic optical networks (EON) support channels operating at heterogeneous line rates by allocating spectral resources in a flexible and dynamic manner. However, in a dynamic traffic scenario, dynamic path setup and teardown operation will inevitably lead to spectral fragmentation. In this paper, to effectively allocate the spectrum in a suitable duration along a better route, we introduce a notion of available time-spectrum consecutiveness (TSC) to describe the spectrum fragmentations along frequency axis and time axis. Based on TSC, three time-aware routing and spectrum assignment (RSA) algorithms are proposed. The novel algorithms retain the TSC as much as possible when establishing a lightpath and reduce the spectrum fragmentation. Simulation results indicate three proposed algorithms achieve lower blocking probability and higher spectrum efficiency. [ABSTRACT FROM PUBLISHER]

Published
2015
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