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庄越挺 《浙江大学学报(A卷英文版)》2005,6(11):1201-1203
INTRODUCTION One of the greatest attractions of a digital library is its multimedia resources humans can use for informa- tion retrieval to knowledge discovery and information integration. A problem of multimedia researchers is to find a so-called killer-Apps which can demonstrate well the potentials of research topics such as video sum- marization, semantic annotation, multimedia cross indexing and retrieval, etc. Deeper research and wider ap- plications of digital libraries revealed the… 相似文献
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Classes are key software components in an object-oriented software system. In many industrial OO software systems,there are some classes that have complicated structure and relationships. So in the processes of software maintenance,testing,software reengineering,software reuse and software restructure,it is a challenge for software engineers to understand these classes thoroughly. This paper proposes a class comprehension model based on constructivist learning theory,and implements a software visualization tool(MFV-Class)to help in the comprehension of a class. The tool provides multiple views of class to uncover manifold facets of class contents. It enables visualizing three object-oriented metrics of classes to help users focus on the understanding process. A case study was conducted to evaluate our approach and the toolkit. 相似文献
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Adaptive audio watermarking based on SNR in localized regions 总被引：4，自引：0，他引：4
In this paper, a novel localized audio watermarking scheme based on signal to noise ratio （SNR） to determine a scaling parameter a is proposed. The basic idea is to embed watermark in selected high inflexion regions, and the intensity of embedded watermarks are modified by adaptively adjusting a. As these high inflexion local regions usually correspond to music edges like sound of percussion instruments, explosion or transition of mixed music, which represent the music rhythm or tempo and are very important to human auditory perception, the embedded watermark is especially expected to escape the distortions caused by time domain synchronization attacks. Taking advantage of localization and SNR, the method shows strong robustness against common problems in audio signal processing, random cropping, time scale modification, etc. 相似文献
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INTRODUCTION The increasingly complex and large number ofsoftware products in today’s software industrymakes the tasks of software maintenance, softwarereuse and software restructuring more and moredifficult. With the popularity of the object-orientedprogramming paradigm, the ability to reverse en-gineer and understand object-oriented legacy sys-tems has become an important problem to be ad-dressed. In the object-oriented reverse engineering(OORE) research area, most researchers f… 相似文献
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MOTIVATION Iris recognition, widely accepted as one of the best biometrics recognition methods in the world because of its stability, uniqueness and noninvasive-ness (Adler, 1965; Daugman, 1993; Ma et al., 2002; Wildes, 1997), has the potential of applications in very wide areas. As a kind of pattern recognition to classify the iris correctly by comparing the similarity between irises, two major works are: (1) to find the appropriate features to represent iris properly; and (2) to classi… 相似文献
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