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Korea : A Synopsis of Its History and Culture A Perspective from Kyongju
Kim, Key-Hiuk 한국동학학회 2001 동학연구 Vol.9·10 No.-
2,000년에 걸친 그 역사의 전반기에 경주(慶州)는 신라의 도읍지로 한국 고유사회와 문화의 공전절후의 발전을 보았으며 당대 중국(中國)에 비할만한 찬란한 불교문화를 이룩하였다. 통일신라(統一新羅)시대에서 유래한 오랜 유학(儒學)전통을 가졌든 경주는 조선왕조시대에는 이 지역 서원(書院)을 중심으로 하여 유학의 주요한 중심지가 되었다. 19세기후반에 동학(東學)이 발생한 배경에는 이와 같은 경주의 장구한 역사와 다양한 문화적 유산이 있었다. During the first half of its two-millenium history, Kyongju was the capital of Silla, which witnessed indigenous Korean society and culture developing to a level without parallel before and since and built a brilliant Buddhist culture rivaling that of contemporary China. During the Chos?n dynasty, Kyongju, with its long tradition in Confucian studies dating from the Unified Silla period, became a major center of Confucian scholarship, centered around local private Confucian academies. The long history and various cultural heritages of Kyongju were behind the birth of Tonghak in the late nineteenth century.
Intra Frame Decision Based on the Correlation Noise Statistics for Wyner-Ziv Video Coding
Taewon Do,Hiuk Jae Shim,Byeungwoo Jeon 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
Wyner-Ziv video coding has been intensively studied among many research groups in order to remove the complexity of the motion estimation at encoder. In this scheme, the original frame is reconstructed using a correlated source called side information. The side information is regarded as a noisy version of the original frame and used to reconstruct the original frame using channel code. The coding performance highly depends on the degree of correlation of two sources since it determines the amount of parity bits for correcting errors on side information. In this paper, we propose an intra frame coding decision method for the Wyner-Ziv coding at frame level when the amount of the estimated noise is relatively large. The proposed method gains coding efficiency by saving many parity bits compared to the conventional Wyner-Ziv coding.
Principle and applications of terahertz molecular imaging
IOP Pub 2013 Nanotechnology Vol.24 No.21
<P>The principle, characteristics and applications of molecular imaging with terahertz electromagnetic waves are reviewed herein. The terahertz molecular imaging (TMI) technique uses nanoparticle probes to achieve dramatically enhanced sensitivity compared with that of conventional terahertz imaging. Surface plasmons, induced around the nanoparticles, raise the temperature of water in biological cells, and the temperature-dependent changes in the optical properties of water, which are large in the terahertz range, are measured differentially by terahertz waves. TMI has been applied to cancer diagnosis and nanoparticle drug delivery imaging. The technique is also compared with magnetic resonance imaging by using a dual-modality nanoparticle probe.</P>
Reliability-Based Deblocking Filter for Wyner-Ziv Video Coding
Khanh Quoc Dinh,Hiuk Jae Shim,Byeungwoo Jeon 대한전자공학회 2016 IEIE Transactions on Smart Processing & Computing Vol.5 No.2
In Wyner-Ziv coding, video signals are reconstructed by correcting side information generated by block-based motion estimation/compensation at the decoder. The correction is not always accurate due to the limited number of parity bits and early stopping of low-density parity check accumulate (LDPCA) decoding in distributed video coding, or due to the limited number of measurements in distributed compressive video sensing. The blocking artifacts caused by blockbased processing are usually conspicuous in smooth areas and degrade the perceptual quality of the reconstructed video. Conventional deblocking filters try to remove the artifacts by treating both sides of the block boundary equally; however, coding errors generated by block-based processing are not necessarily the same on both sides of the block boundaries. Such a block-wise difference is exploited in this paper to improve deblocking for Wyner-Ziv frameworks by designing a filter where the deblocking strength at each block can be non-identical, depending on the reliability of the reconstructed pixels. Test results show that the proposed filter not only improves subjective quality by reducing the coding artifacts considerably, but also gains rate distortion performance.
Small-block sensing and larger-block recovery in block-based compressive sensing of images
Dinh, Khanh Quoc,Shim, Hiuk Jae,Jeon, Byeungwoo Elsevier 2017 SIGNAL PROCESSING-IMAGE COMMUNICATION - Vol.55 No.-
<P><B>Abstract</B></P> <P>In the block-based compressive sensing (CS) of images, a small block is more practical due to its low-cost sensing in terms of the required memory and the computational complexity. A large block, however, is more effective in CS recovery because of the high probability of a smaller mutual coherence and a more-compressible representation of the images. This paper proposes a block-based CS scheme that is applicable to images with a small-block sensing and larger-block recovery (SBS-LBR), whereby a block-diagonal sensing matrix is used to arbitrarily set a recovery-block size that is multiple-times larger than the sensing block size; subsequently, a more compressible transform signal is generated with large-sized sparsifying basis. The proposed SBS-LBR not only facilitates a low sampling cost, but also improves the recovered images from the larger recovery-block size. Our experiment results confirm a theoretical analysis of the scheme, and have shown the improvement from the proposed SBS-LBR with the suggested proper choices regarding the sensing- and recovery-block sizes.</P> <P><B>Highlights</B></P> <P> <UL> <LI> ACS scheme employs different block sizes in the sensing and the recovery. </LI> <LI> The scheme is analyzed with mutual coherence and compressibility of transform signal. </LI> <LI> The scheme achieves both low sampling cost and more-favorable recovery performance. </LI> </UL> </P>
고봉혁(Bonghyuck Ko),심혁재(Hiuk Jae Shim),전병우(Byeungwoo Jeon) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.11
Investigation on distributed video coding (DVC) has been carried out to make an encoder extremely simple and the Wyner-Ziv coding is one of the representative such DVC schemes. However, the frame interpolation at decoder makes erroneous side information when the basic assumption of linear motion between frames is not satisfied. In this paper, we propose a side matching in the frame interpolation to improve the side information. The noise reduction in side information allows the proposed algorithm to achieve coding improvements not only in bit-rate but also in PSNR.