• Title/Summary/Keyword: coding region

Search Result 723, Processing Time 0.036 seconds

Coding of Remotely Sensed Satellite Image with Edge Region Compensation (에지 영역을 보상한 원격 센싱된 인공위성 화상의 부호화)

  • Kim, Young-Choon;Lee, Kuhn-Il
    • Journal of Sensor Science and Technology
    • /
    • v.6 no.5
    • /
    • pp.376-384
    • /
    • 1997
  • In this paper, we propose a coding method of remotely sensed satellite image with edge region compensation. This method classifies each pixel vector considering spectral reflection characteristics of satellite image data. For each class, we perform classified intraband VQ and classified interband prediction to remove intraband and interband redundancies, respectively. In edge region case, edge region is compensated using class information of neighboring blocks and gray value of quantized reference bands. Then we perform classified interband prediction using compensated class information to remove interband redundancy, effectively. Experiments on LANDSAT-TM satellite images show that coding efficiency of the proposed method is better than that of the conventional methods.

  • PDF

Identification of chromosomal translocation causing inactivation of the gene encoding anthocyanidin synthase in white pomegranate (Punica granatum L.) and development of a molecular marker for genotypic selection of fruit colors

  • Jeong, Hyeon-ju;Park, Moon-Young;Kim, Sunggil
    • Horticulture, Environment, and Biotechnology : HEB
    • /
    • v.59 no.6
    • /
    • pp.857-864
    • /
    • 2018
  • Previous studies have not detected transcripts of the gene encoding anthocyanidin synthase (ANS) in white pomegranates (Punica granatum L.) and suggest that a large-sized insertion in the coding region of the ANS gene might be the causal mutation. To elucidate the identity of the putative insertion, 3887-bp 5' and 3392-bp 3' partial sequences of the insertion site were obtained by genome walking and a gene coding for an expansin-like protein was identified in these genome-walked sequences. An identical protein (GenBank accession OWM71963) isolated from pomegranate was identified from BLAST search. Based on information of OWM71963, a 5.8-Mb scaffold sequence with genes coding for the expansin-like protein and ANS were identified. The scaffold sequence assembled from a red pomegranate cultivar also contained all genome-walked sequences. Analysis of positions and orientations of these genes and genome-walked sequences revealed that the 27,786-bp region, including the 88-bp 5' partial sequences of the ANS gene, might be translocated into an approximately 22-kb upstream region in an inverted orientation. Borders of the translocated region were confirmed by PCR amplification and sequencing. Based on the translocation mutation, a simple PCR codominant marker was developed for efficient genotyping of the ANS gene. This molecular marker could serve as a useful tool for selecting desirable plants at young seedling stages in pomegranate breeding programs.

Localization of Bacillus CMCase gene in pBSl cloned in Escherichia coli

  • 박승환;박무영
    • Proceedings of the Korean Society for Applied Microbiology Conference
    • /
    • 1986.12a
    • /
    • pp.524.2-524
    • /
    • 1986
  • The Bacillus CMCase gene we have previously cloned in E. coli is contained in the 3.2 Kb chromosomal insert of the 7.5 Kb pBSl plasmid. We have also found that the CMCase produced by this gene has molecular weight of about 32,000 suggesting that the CMCase coding region lies on about 0.3 Kb fragment. The present report deals with a series of subclonings to localize more precisely the region coding for the CMCase production.

  • PDF

A New Interior-Filling Algorithm Based on Binary Boundary Coding (이진 경계 코드를 이용한 새로운 영역채움 알고리듬)

  • 심재창;조석제;하영호
    • Journal of the Korean Institute of Telematics and Electronics
    • /
    • v.26 no.11
    • /
    • pp.1867-1871
    • /
    • 1989
  • One of the most common problems in pattern recognition and image processing is filling the interior of a region when its contour is given. The existing algorithms of the filling are parity check technique, seeding technique, and technique based on chain coding the boundaries. In this paper, a very simple but effective technique for filling the interior of bounded region is proposed. This algorithm is based on the information of binary-coded boundary direction and covers some of the drawbacks reported in the earlier relevant works.

  • PDF

Image segmentation based on hierarchical structure and region merging using contrast for very low bit rate coding (초저속 부호화를 위한 계층적 구조와 대조를 이용한 영역 병합에 의한 영상 분할)

  • 송근원;김기석;박영식;이호영;하영호
    • Journal of the Korean Institute of Telematics and Electronics S
    • /
    • v.34S no.11
    • /
    • pp.102-113
    • /
    • 1997
  • In this paepr, a new image segmentation method reducing efficiently contour information causing bottleneck problem at segmentatio-based very low bit rate codingis proposed, while preserving objective and subjective quality. It consists of 4-level hierarchical image segmentation based on mathematical morphology and 1-leve region merging structure using contast of two adjacent regions. For two adjacent region pairs at the fourth level included in each region of the thid level, contrast is calculated. Among the pairs of two adjacent regions with less value than threshold, two adjacent regions having the minimum contrast are merged first. After region merging, texture of the merged region is updated. The procedure is performed recursively for all the adjacent region pairs at the fourth level included in each region of the third level. Compared with the previous method, the objective and subjective image qualities are similar. But it reduces 46.65% texture information on the average by decreasing total region number to be tansmitted. Specially, it shows reduction of the 23.95% contour information of the average. Thus, it can improve efficiently the bottleneck problem at segementation-based very low bit rate coding.

  • PDF

Fast Coding Unit Decision Algorithm Based on Region of Interest by Motion Vector in HEVC (움직임 벡터에 의한 관심영역 기반의 HEVC 고속 부호화 유닛 결정 방법)

  • Hwang, In Seo;Sunwoo, Myung Hoon
    • Journal of the Institute of Electronics and Information Engineers
    • /
    • v.53 no.11
    • /
    • pp.41-47
    • /
    • 2016
  • High efficiency video coding (HEVC) employs a coding tree unit (CTU) to improve the coding efficiency. A CTU consists of coding units (CU), prediction units (PU), and transform units (TU). All possible block partitions should be performed on each depth level to obtain the best combination of CUs, PUs, and TUs. To reduce the complexity of block partitioning process, this paper proposes the PU mode skip algorithm with region of interest (RoI) selection using motion vector. In addition, this paper presents the CU depth level skip algorithm using the co-located block information in the previously encoded frames. First, the RoI selection algorithm distinguishes between dynamic CTUs and static CTUs and then, asymmetric motion partitioning (AMP) blocks are skipped in the static CTUs. Second, the depth level skip algorithm predicts the most probable target depth level from average depth in one CTU. The experimental results show that the proposed fast CU decision algorithm can reduce the total encoding time up to 44.8% compared to the HEVC test model (HM) 14.0 reference software encoder. Moreover, the proposed algorithm shows only 2.5% Bjontegaard delta bit rate (BDBR) loss.

The Region-of-Interest Based Pixel Domain Distributed Video Coding With Low Decoding Complexity (관심 영역 기반의 픽셀 도메인 분산 비디오 부호)

  • Jung, Chun-Sung;Kim, Ung-Hwan;Jun, Dong-San;Park, Hyun-Wook;Ha, Jeong-Seok
    • Journal of the Institute of Electronics Engineers of Korea SP
    • /
    • v.47 no.4
    • /
    • pp.79-89
    • /
    • 2010
  • Recently, distributed video coding (DVC) has been actively studied for low complexity video encoder. The complexity of the encoder in DVC is much simpler than that of traditional video coding schemes such as H.264/AVC, but the complexity of the decoder in DVC increases. In this paper, we propose the Region-Of-Interest (ROI) based DVC with low decoding complexity. The proposed scheme uses the ROI, the region the motion of objects is quickly moving as the input of the Wyner-Ziv (WZ) encoder instead of the whole WZ frame. In this case, the complexity of encoder and decoder is reduced, and the bite rate decreases. Experimental results show that the proposed scheme obtain 0.95 dB as the maximum PSNR gain in Hall Monitor sequence and 1.87 dB in Salesman sequence. Moreover, the complexity of encoder and decoder in the proposed scheme is significantly reduced by 73.7% and 63.3% over the traditional DVC scheme, respectively. In addition, we employ the layered belief propagation (LBP) algorithm whose decoding convergence speed is 1.73 times faster than belief propagation algorithm as the Low-Density Parity-Check (LDPC) decoder for low decoding complexity.

Characterization of the Genes of Salmonella typhimurium conferring the penetration of cultured HEp-2 and Chinese hamster cells

  • Park, Jeong-Uk;Jeong, Mi-Yeon;Kim, Mi-Rim;Jeong, Yeong-Gi;Ju, U-Hong
    • 한국생물공학회:학술대회논문집
    • /
    • 2000.04a
    • /
    • pp.584-587
    • /
    • 2000
  • The invasion genes from Salmonella typhimurium were identified by the construction of a cosmid library and subcloning genes into a plasmid vector, pGEM-7Z. The 4.65 kb fragment of the invasion-conferring genomic region of the subclone, pSV6235 was sequenced in both direction. The three open reading frames, which were located at downstream of a promoter region, were designated as sir (Salmonella invasion region)A coding for the 36 amino acids, sirB coding for the 132 amino acids and sirC for the 82 amino acids, respectively. Interesingly, the genomic region of pSV6235 was highly homologous to Yersinia enterocolitica genomic DNA for a high pathogenicity island and Salmonella enteritidis insertion element IS1351 and IS200 DNA. These results show that there could be a significant relationship between S. typhimurium, Y. enterocolitica and S. enteritidis with respect to horizontal evolution process and acquisition of virulence determinants by means of transposon, plasmid or bacteriophage.

  • PDF

Adaptive subband vector quantization using motion vector (움직임 벡터를 이용한 적응적 부대역 벡터 양자화)

  • 이성학;이법기;이경환;김덕규
    • Proceedings of the IEEK Conference
    • /
    • 1998.06a
    • /
    • pp.677-680
    • /
    • 1998
  • In this paper, we proposed a lwo bit rate subband coding with adaptive vector quantization using the correlation between motion vector and block energy in subband. In this method, the difference between the input signal and the motion compensated interframe prediction signal is decomposed into several narrow bands using quadrature mirror filter (QMF) structure. The subband signals are then quantized by adaptive vector quantizers. In the codebook generating process, each classified region closer to the block value in the same region after the classification of region by the magnitude of motion vector and the variance values of subband block. Because codebook is genrated considering energy distribution of each region classified by motion vector and variance of subband block, this technique gives a very good visual quality at low bit rate coding.

  • PDF

Medical Image Data Compression Based on the Region Segmentation (영역분할을 기반으로 한 의료영상 데이타 압축)

  • 김진태;두경수
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.3 no.3
    • /
    • pp.597-605
    • /
    • 1999
  • In this paper, we propose a cardioangiography sequence image coding scheme which use a subtraction between initial image and current frame inserted contrast dye. Stable regions are obtained by the multithreshold and meaningful region is extracted by the images with stable region. The image with meaningful region is classified into contour and texture information. Contour information is coded by contour coding. And texture information is approximated by two-dimensional polynomial function and each coefficients is coded. Experimental results confirm that the sequence of cardioangiography are well reconstructed at the low bit rate (0.02∼0.04 bpp) and high compression ratio.

  • PDF