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  • Zeki Yetgin
  • IEEE Trans. Geoscience and Remote Sensing
  • 2012
In this paper, we propose a novel technique for unsupervised change detection of multitemporal satellite images using Gaussian mixture model (GMM), local gradual descent, and k-means clustering. Data distribution of the difference image is first modeled by bimodal GMM with “changed” and “unchanged” components. The neighborhood data around each pixel form a(More)
This study focuses on the gain of using progressive download instead of legacy download for streamable media files for wireless multicasting networks. With progressive download, the media content can be played after some waiting time, while the downloading still continues in the background. We focus on 3GPP's wireless multimedia broadcast multicast system(More)
1389-1286/$ see front matter 2011 Elsevier B.V doi:10.1016/j.comnet.2011.09.017 ⇑ Corresponding author. Tel.: +90 324 3610001; fa E-mail address: zyetgin@mersin.edu.tr (Z. Yetgin The paper introduces an efficient way of delivering multimedia files over the multimedia broadcast multicast service (MBMS) and study the performance of the proposed MBMS download(More)
Most crime analysis tools used to find criminals of a particular incident or, to find the interrelations among the crime incidents, possibly over a GIS (Geographical Information System) map. The development of these tools require access to incident-level crime data. Obtaining real data is very restricted if not possible due to the official regulations. In(More)
In this paper, we propose the grey-wavelet hypothesis for colour constancy which assumes that both the average reflectance of surfaces and the average of reflectance differences in a scene are achromatic. The framework combines well-known grey-world and grey-edge hypotheses under the wavelet framework. The quality of the various instantiations of the(More)
In this paper, a QoE (quality of experience) aware player is introduced that changes the temporal characteristics of streaming according to subjective parameters to increase the QoE. With the proposed player, two contributions are provided. First, the capability of rate adaptation methods is further enhanced by the playing rate adaptation where playing some(More)
Unsupervised moving object edge segmentation in dual-tree complex wavelet transform domain is presented. The interframe change detection method with automatic thresholds in six complex wavelet subbands is used with edge map detected by Canny edge detector in the corresponding frame in order to detect moving edges. We propose automatic threshold selection(More)