聚类有效性函数：熵公式

依据香农信息熵理论。本文引入了一个新的划分熵公式。结合Ｊ．Ｃ．Ｂｅｚｄｅｋ给出的划分熵，定义了一个新的聚类有效性函数。通过四组数据对该聚类有效性函数的判决功能和鲁棒性进行了研究。     

Multisensor long distance target detection using support vector machine

Multisensor image fusion could improve system performances such as detection,tracking,and identification greatly.In this paper,a long distance target detection approach is presented based on multisensor image features fusion.This method extracts two different features from visual and infrared(IR)image sequences respectively to detect regions of motion information content.Temporal change feature is extracted from the visual image sequence using temporal decomposition based on wavelet,which reflects the dynamical content variation at a pixel at any time.And correlation features between local regions are extracted from IR image sequence to distinguish regions with potential moving targets.All these features are merged into a multi-dimensional space and the support vector machine is trained to select regions that have the potential target at each pixel location.The method is robust and feasible to detect long distance targets in clutter background scene.     

Image registration by maximization of mutual information based on edge width matching using particle swarm optimization

Registration of multimodal medical images is the firstimportant step in successful fusion of multimodal med-ical images, which produces different information. Themutual information (MI) between two images can be re-garded as a statistical tool to measure the degree to whichan image can be predicted from the other. It has beenfound to be an appropriate similarity measure for manymultimodal images's registration problems[1,2]. However,the local maxima of MI make it difficult to register im-age…     

Improvement of bandwidth in a 100 kHz swept laser source with phase controllable signal driving

Swept source optical coherence tomography(SS-OCT) is a new noninvasive technique for assessing tissue. Although it has advantages, such as being label-free, noninvasive, and with high resolution, it also has drawbacks: there has been no indepth research into identifying the driving of swept source. Based on preliminary research, we demonstrate a novel driving modulation method of a fiber Fabry–Perot tunable filter ranging phase adjustable as a tool for making bandwidth compensation of a swept la...