관심영역 추출을 이용한 PDA기반의 원격강의 시스템 설계 및 구현

Abstract

PDA provides an opportunity for users to study anytime and anywhere because it is portable and convenient thanks to its relatively small size. However, users may face difficulties to fully recognize the characters provided through lecture videos, due to its low resolution and small scaled screen. This thesis proposes a system of remote lecture in which the size of videos can be adjusted and transmitted on the basis of contents necessary for study, using detection of region-of- interest(ROI) image, and a method of image scaling in a bid to solve such a problem of PDAs. This proposed system prepared the opportunity to raise expandability of remote device and presented the direction about the movie service that is efficient in remote communication that provides optimized lecture contents to students and minimizes packet transmission quantity in the real-time lecture image. The experiment on 802.11b wireless network shows that the proposed system is able to provide more optimized lecture videos than in existing method.