공간 주파수 해석에 의한 이미지 평가에 대하여

문영득 부산 외국어 대학교 1999 外大論叢 Vol.19 No.3

Digital halftoning is the presentation technique with gray or color the image by using visual characteristics in spartial frequence domain. Digital printer is printing the image with AM or FM halftoning, or error diffusion halftoning method, and quality of the printed image is spatial frequence characteristics of halftoning filter. The power spectrum of cluster type is concenturated in the low frequency domain and that of dispersed type is dispursed between low and medium. As results, 45。 halftone screen is more pleaser then 90。 with human visual in AM screen.

영상 복잡도에 기반한 GOP구조의 동적 제어 알고리즘

문영득,최금수 대한전기학회 2004 전기학회논문지 D Vol.53 No.7

This paper propose a method that GOP structure based on the picture complexity change realtime adaptive without pre-analysis or time delay. Proposed algorithm calculates the complexity of pictures at first, and the ratio of the complexity( X$\sub$p/ /X$\sub$i/) between P picture and I picture is calculated. The suitable M value for the three picture select by comparing with predetermined threshold. Used bit and vbv_delay the value of GOP is calculated according to selected M. Experimental results show that the prediction error is reduce than the fixed GOP structure. Since the complexity distribution of the sequence is different, applied limits of threshold value is changed, also.

JPEG2000 정지 영상 압축 표준에서의 효율적인 관심 영역 코딩에 관한 연구

문영득 부산 외국어 대학교 2003 外大論叢 Vol.27 No.-

Region of Interest is more important than other image in compressed image. Region of Interest is demanded high compression and high quality. Maxshift method and Scaling based method have problems in JPEG 2000 proposed that increase bit rate and need extra decoder. We propose Region of Interest scaling method based Maxshift method of JPEG 2000 part Ⅰ for improving the problems. It could reconstruct some degree background region by proposed method before lossless reconstruct Region of Interest. Also, could satisfactorly reconstruct Region of Interest and background region that don't transmit the full image when low bit transmission is demanded.

영상 복잡도에 기반한 GOP구조의 동적 제어 알고리즘

문영득,최금수 대한전기학회 2004 전기학회논문지 D Vol.53 No.4(D)

This paper propose a method that GOP structure based on the picture complexity change realtime adaptive without pre-analysis or time delay. Proposed algorithm calculates the complexity of pictures at first, and the ratio of the complexity() between P picture and I picture is calculated. The suitable M value for the three picture select by comparing with predetermined threshold. Used bit and vbv_delay the value of GOP is calculated according to selected M. Experimental results show that the prediction error is reduce than the fixed GOP structure. Since the complexity distribution of the sequence is different, applied limits of threshold value is changed, also.

영상압축을 위한 효율적인 관심영역 부호화 알고리즘

문영득,최금수 정보과학연구소부산외국어대학교 2002 情報科學論集 Vol.4 No.-

Region of Interest is more important than other image in compressed image. Region of Interest is demanded high compression and high quality. Maxshift method and Scaling based method have problems in JPEG 2000 proposed that increase bit rate and need extra decoder. We propose Region of Interest scaling method based Maxshift method of JPEG 2000 part I for improving the problems. It could reconstruct some degree background region by proposed method before lossless reconstruct Region of Interest. Also, could satisfactorly reconstruct Region of Interest and background region that don't transmit the full image when low bit transmission is demanded.

멀티미디어 콘텐츠 영상의 효율적 압축

문영득 부산 외국어 대학교 2004 外大論叢 Vol.28 No.-

There are many interest on person or face of person when doing the digital photograph or web browse the image. When code ROI including the face is coded the background region also. In this paper , proposed new method based Maxshift method using in JPEG2000. Generally, before region of interest is reconstructed fully don't fully reconstruct background region. It solve these weak points and increase the efficiency and reduce to use memory numbers. It was effective region of interest coding method. By using the proposed method can effective construct region of interest and background region and efficiency image quality and reduce the memory numbers.

한정적 선형 선택에 의한 프로그램 구축에 관하여

문영득 釜山 外國語 大學校 1996 外大論叢 Vol.14 No.1

For the Solving of problem, it is useful that change with clausal-form after initializing in first-order logic because the transfering with set of clause algorithm is simple. Set of syntax and logical implication between each syntax are the most importance for the solving of problam. Machanism of problem solving in logic programming is the proof of theory, it is that specialize the computing by knowledge inference. New clauses about the results are derived by using resolution of definite linear selection. Searching for the proof of resolution procedure, consider the effectivity, aimed at deciding how it limit the selection don't sacrifice the completion.

압축알고리즘에 의한 영상복원에 관하여

문영득 부산 외국어 대학교 2000 外大論叢 Vol.20 No.1

In order to provide high level image with low cost, we need to compress the image by removing the spatial and time prolixity. We choose Huffman coding and DCT for source coding method. Those assined the low bit value for the frequently generated data and the high bit value for the small quantity data and they have variable length. According to our result, more efficience for the color tome image compression, and in general compressed image loss appear nearly more than 4.0 though people have slightly different view when our team look at the resulting image.

선형등화기를 이용한 다중-사용자 복조 혼합 TDMA/CDMA 시스템

문영득,김상규 부산 외국어 대학교 2002 外大論叢 Vol.24 No.-

In this paper, we studied for multi-user detection system, which hold the merit of CDMA system and can enhance the system capacity. We designed actually realizable quasi-optimal multiuser detection system by use of linear equalizer on the concept that multiuser detection algorithm can be reduced by combination TDMA with CDMA, we call this the hybrid TDMA/CDMA system. And we proposed multiuser detection system, which can use PSAD and MSDD channel estimation method. As a result of performance analysis, we acquired equal or much better performance by use of linear multichannel equalizer in the case of not so many user. And on the occasion of many user within cell we can also acquired much better performance in comparison with conventional single user detection system by use of hybrid TDMA/CDMA system.

새로운 폰트 개발에 의한 효과적인 멀티미디어 콘텐츠 디자인

문영득(Young-Deuk Moon) 한국정보기술학회 2013 한국정보기술학회논문지 Vol.11 No.7

According to develop multimedia contents construction circumstances, the method of font expression on display have developed variously. Fonts of various design have developed for difference contents design of developer and requirement satisfaction of user. On this paper propose the effective method of fonts used web and multimedia satisfied needs of developer and user and method for construction the contents circumstance of good quality. As Korean digital font include Hangul, Latin alpabet and Chinese characters, tend to lack unity, and Hangul and other characters identity are a little ambivalent when they used together. In order to solve these problems, this paper attempts to use same serif and descender shape on Hangul and Latin alphabet design to make unified identity.