seminars for cse&IT

Video impainting under constrained camera motion:

Abstract

A framework for inpainting missing parts of a video sequence recorded with a moving or stationary camera is presented in this paper. The region to be inpainted is general: It may be still or moving, in the background or in the foreground, it may occlude one object and be occluded by some other object. The algorithm consists of a simple preprocessing stage and two steps of video inpainting. In the preprocessing stage, each frame is segment into foreground and background. Segmentation is used to build three image mosaics that help to produce time consistent results and also improve the performance of the algorithm by re-ducing the search space. In the first video inpainting step, moving objects reconstruct in the foreground that are “occluded” by the region to be inpainted. To this end,gap  filled as much as possible by copying information from the moving foreground in other frames, using a priority-based scheme. In the second step, inpaint the remaining hole with the background. To accomplish this, first frames are aligned and directly copy when possible. The remaining pixels are filled in by extending spatial texture synthesis techniques to the spatiotemporal domain. The proposed framework has several advantages over state-of-the-art algorithms that deal with similar types of data and constraints. It permits some camera motion, is simple to implement, fast, does not require statistical models of background nor foreground, works well in the presence of rich and cluttered backgrounds, and the results show that there is no visible blurring or motion artifacts. A number of real examples are shown supporting these findings.

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seminars for cse&IT

                          UBIQUITOUS COMPUTING

                            

ABSTRACT

One is happy when one’s desires are fulfilled.

The highest ideal of ubicomp is to make a computer so imbedded, so fitting, so natural, that we use it without even thinking about it. Pervasive computing is referred as Ubiquitous computing through out the paper.

One of the goals of ubiquitous computing is to enable devices to sense changes in their environment and to automatically adapt and act based on these changes based on user needs and preferences. The technology required for ubiquitous computing comes in three parts: cheap, low- power computers that include equally convenient displays, a network that ties them all together, and software systems implementing ubiquitous applications. Current trends suggest that the first requirement will easily be met.

Our preliminary approach: Activate the world. Provide hundreds of wireless computing devices per person per office, of all scales. This has required network in operating systems, user interfaces, networks, wireless, displays, and many other areas. We call our work “ubiquitous computing”. This is different from PDA’s, dynabooks, or information at your fingertips. It is invisible; everywhere computing that does not live on a personal device of any sort, but is in the woodwork everywhere.

Single-room networks based on infrared or newer electromagnetic technologies have enough channel capacity for ubiquitous computers, but they can only work indoors.

Cryptographic techniques already exist to secure messages from one ubiquitous computer to another and to safeguard private information stored in networked systems.

We suggest using cell phone device available in the market for ubicomp also i.e., the handheld device will be used for both ubicomp and also as a cell phone.

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seminars for cse&IT

  Super worms and Crypto virology: a Deadly Combination

Abstract

Understanding the possible extent of the future attacks is the key to successfully protecting against them. Designers of protection mechanisms need to keep in mind the potential ferocity and sophistication of viruses that are just around the corner. That is why we think that the potential destructive capabilities of fast spreading worms like the Warhol worm, Flash worm and Curious Yellow need to be explored to the maximum extent possible. While re-visiting some techniques of viruses from the past, we can come across some that utilize cryptographic tools in their malicious activity. That alarming property, combined with the speed of the so-called “super worms”, is explored in the present work. Suggestions for countermeasures and future work are given.

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seminars for cse&IT

STAVIES: A System for Information Extraction from unknown Web Data Sources through Automatic Web Wrapper Generation Using Clustering Techniques

ABSTRACT

            In this paper a fully automated wrapper for information extraction from Web pages is presented. The motivation behind such systems lies in the emerging need for going beyond the concept of "human browsing.” The World Wide Web is today the main "all kind of information” repository and has been so far very successful in disseminating information to humans. By automating the process of information retrieval, further utilization by targeted applications is enabled. This novel presents a fully automated scheme for creating generic wrappers for structures web data sources. The key idea in this novel system is to exploit the format of the Web pages to discover the underlying structure in order to finally infer and extract pieces of information from the Web page. This system first identifies the section of the Web page that contains the information to be extracted and then extracts it by using clustering techniques and other tools of statistical origin. STAVIES can operate without human intervention and does not require any training. The main innovation and contribution of the proposed system consists of introducing a signal-wise treatment of the tag structural hierarchy and using hierarchical clustering techniques to segment the Web pages. The importance of such a treatment is significant since it permits abstracting away from the raw tag-manipulating approach. The system performance is evaluated in real-life scenarios by comparing it with two state-of-the-art existing systems, OMINI and MDR.

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