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- 저자 : 김승종 (검색결과 269 건)
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김승종 한국언어문학회 2004 한국언어문학 Vol.53 No.-
This study was designed to restudy the teaching creation focused on learner and process. The teaching creation must have a strategy for learner to receive literary text positively in accordance with the curriculum VII. It is necessary that education must be composed in order to make learner more creative. To fulfill and perform the development of learners’ creativity, the brainstorming toolbox can be useful. Brainstorming toolbox is constituted with substituting, combine, modify character, narrator, setting. Parody which rearrange to rewrite fiction is one of the effective methode. Drama in education can be the scaffold for teachers who instruct writing fiction. Drama in education can generate learners’ motive to write fictions. Appearance of various media gave birth to hypertext literature and the internet literature as digital literature. It let diversity types of literature like electronic literature, visual literature, oral literature, especially computer game. Change of literary activities by the internet activity, it is possible to share appreciation of literary works. It is required to find interaction with digital media. Interactivity, elasticity, flexibleness are characteristics which digital story telling has. Teacher must design teaching creation using digital media, but also principle of digital media, process of making digital motion picture.
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블록 기반 영상압축에 있어서 방향성 보간을 이용한 에러 은닉 기법
김승종,정제창,최병욱 한국통신학회 1997 韓國通信學會論文誌 Vol.22 No.5
In this paper, we propose an error concealment technique using directional interpolation in block-based image compression. In the proposed method the edge direction is determined by finding the maximum correlation coefficients of boundary pixels of blocks neighboring the errored block in spatial domain. Then the errored block is interpolated linearly or bilinearly along the determined edge direction. The proposed method can conceal the block error, the macro block error, and the slice error adaptively. Also, the parameters for the directional interpolation are represented by closed forms. When applied to compressed images, the proposed method shows superior subjective and objective quality to conventional error concealment methods.
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웨이블릿 기반 압축영상의 화질 향상을 위한 방향성 후처리 기법
김승종,정제창 한국통신학회 2000 韓國通信學會論文誌 Vol.25 No.6
Since image data has large data amount, proper image compression is necessary to transmit and store the data efficiently. Image compression brings about bit rate reduction but results in some artifacts. This artifacts are blocking artifacts, mosquito noise, which are observed in DCT based compression image, and ringing artifacts, which is perceived around the edges in wavelet based compression image. In this paper, we propose directional postprocessing technique which improved the decoded image quality using the fact that human vision is sensible to ringing artifacts around the edges of image. First we detect the edge direction in each block. Next we perform directional postprocessing according to detected edge direction. Proposed method is that the edge direction is block. Next performed directional postprocessing according to detected edge direction. If the correlation coefficients are equivalent to each directions, postprocessing is not performed. So, time of the postproces ing brings about shorten.
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부호변환 및 비트 평면 상관도를 이용한 웨이블릿 기반 영상 압축
김승종,정제창,최병욱 한국통신학회 2000 韓國通信學會論文誌 Vol.25 No.4
본 논문에서는 선형 위상 응답 특성을 갖고 쌍직교 웨이블릿 변환(biorthogonal wavelet transform)을 이용하여 영상을 다중 해상도롤 분해하고 분해된 부 밴드들을 최대 분할 이득(maximum classificatio gain)을 이용하여 분할하고 분할된 클래스 별로 최적 비트 할당을 통해 양자화 한 후, 컨텍스트 기반 비트 평면 부호화를 이용한 영상 압축 방법을 제안한다. 제안하는 방법을 양자화 된 계수들에 대해 부호변환(shuffling)과정을 거쳐 비트 평면 부호화 시, sign 비트 평면을 제거하여 부호화 성능을 향상시키며, 컨텍스트(context)기반 비트 평면 부호화 시, 각각의 클래스 및 밴드별로 균일한(uniform)컨텍스트를 부여하지 않고 현재 비트 평면과 이전 비트 평면 사이의 상관도(correlation)를 측정하여 가장 큰 상관도를 갖는 방향으로 컨텍스트를 부여하여 보다 효율적인 부호화 성능을 얻는 방법으로 부호화를 통해 제안한 방법의 우수성을 입증하고자 한다. In this paper, we propose wavelet transform image compression method using shuffling and bit plane correlation. Proposed method is that original image decompose into multiresolutions using biorthogonal wavelet transform with linear phase response property and decomposed subbands are classified by maximum classification gain. And classified data sets in each subband are quantized using arbitrary set optimum bit allocation method. Quantized data sets in each subband are shuffled and context based bit plane arithmetic encoded .In context based bit plane arithmetic encoding, the context for each subband is not assigned uniformly, but assigned according to maximum correlation direction. Our results are comparable, or superior for some images at low rates, to published state-of-the-art coders.
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