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基于选择子带提升位平面的ROI编码方法研究 被引量：1

ROI Coding Method Based on Selecting Subband and Bitplane Shift
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摘要 首先分析了JPEG2000中两种ROI编码机制的优缺点,然后对图像小波变换后各子带内ROI系数的能量情况进行统计分析,提出了基于小波变换后的ROI掩膜能量选取提升重要子带,同时对重要子带采用适应小波"零树"特性的子带扩充,进而提出了一种基于选择子带提升位平面的ROI编码方法。该算法有以下优点:(1)能够控制ROI和ROB的相对压缩质量;(2)可以获得同一图像中多ROI的不同压缩率;(3)允许定义任意形状的ROI且无须在码流中包含形状信息。实验结果验证了所提方法的有效性。 Through carefully analyzing both the advantages and disadvantages of the two kinds of ROI coding methods in JPEG2000, and then statistically analyzing the energy of ROI coefficients of wavelet transform in each subband, we proposed selecting and shifting important subband by ROI mask and the energy based on the wavelet transform, simul-taneously expanding the important subband which should meet the the “Zero-tree” characteristic, a new region of interest（ROI） coding method based on selecting subband and bitplane shift was proposed. This scheme has several novel-ties： （1） flexibly adjust the compression quality of the ROI and the ROB; （2） code multiple ROIs at various degrees of interest,（3） arbitrarily shape ROI coding without coding the shape. Experimental results validate the validity of proposed algorithm.
作者 夏春宇 王相海
机构地区 辽宁师范大学计算机与信息技术学院 南京大学计算机软件新技术国家重点实验室
出处 《计算机科学》 CSCD 北大核心 2009年第12期272-277,共6页 Computer Science
基金 辽宁省自然基金项目(20072156) 辽宁省教育厅科学技术研究项目(20060486) 辽宁"百千万人才工程"培养经费 南京邮电学院图像处理与图像通信江苏省重点实验室开放基金(ZK207008)资助
关键词 最大位移法 感兴趣区 小波系数掩模 嵌入式零树小波 JPEG2000 Maxshift method, Region of interest （ROI）, Wavelet coefficient mask, Embedded zero-tree wavelet,JPEG2000
分类号 TP391 [自动化与计算机技术—计算机应用技术]
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参考文献9

  • 1ISO/IECJTC 1/SC2 9/WG1 ( ITU- TSG 8 ) JPEG2 00 0 Part Ⅰ Number15444-1,2000(3).
  • 2ISO/IECJTC 1/SC 29/WG 1 (ITU-T SGS)JPEG2000 Part Ⅱ Final Committee Draft Version 1.0,2000(12).
  • 3Christopoulos C,Askelf J, Larsson M. Efficient methods for encoding regions of interest in the upcoming JPEG2000 .still image coding standard [J]. IEEE Signal Processing Letters, 2000, 7 (9) :247- 249.
  • 4Wang Zhou, Bovik A C. Bitplane-by-bitplane shift (BbBShift)-A suggestion for JPEG2000 region of interest image coding[J]. IEEE Signal Processing Letters,2002,9(5) :160-162.
  • 5Liu Lijie, Fan Guoliang. A new JEG2000 region-of-interest image coding method: partial significant bitplanes shift [J]. IEEE Signal Processing Letters, 2003,10(2) : 35-38.
  • 6Shapiro J M. Embedded image coding using zero trees of wavelet coefficients[J]. IEEE Transactions on Signal Processing, 1993, 41 (12) : 3445-3463.
  • 7Said A, Pearlman W. An new , fast and efficient image codec based on set partitioning in hierarchical trees[J]. IEEE Transactions Circ. Sys. Video Tech. , 1996,6(3):243-249.
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  • 9Tahoees P G, et al. Image compression: maxshift ROI encoding options in JPEG2000[J]. Computer Vision and Image Understanding, 2008,109 : 139-14.

同被引文献8

  • 1HUANG XL, WANG G, LIAO QR, et al. Information synthesis algorithm based on ROI coding method of JPEG2000 [A]. Beijing: 2009 5th international conference on wireless communications, networking, and mobile computing [C]. 2009, 1(8): 2228-2230.
  • 2MUNEYASU M, ODANI S, KITAURA Y, et al. An implementation of privacy protection for a surveillance camera using ROI coding of JPEG2000 with face detection [J]. IEICE transactions on fundamentals of electronics communications and computer sciences, 2009, E92A(11): 2858-2861.
  • 3TAHOCES PGI, VARELA JR, LADO MJ, et al. Image compression: maxshift ROI encoding options in JPEG2000 [J]. Computer vision and image understanding, 2008, 109(2): 139-145.
  • 4L LIU, G FAN. A new JPEG2000 region-of-interest image coding method:partial significant bitplanes shift [J]. IEEE signal processing letters, 2003, 10(2): 35-38.
  • 5Z WANG, C BOVIK. Bitplane-by-bitplane shift (bbbshift)-a suggestion for JPEG2000 region of interest image coding [J]. IEEE signal processing letters, 2002, 9(5): 160-162.
  • 6LI JX, ZHU RH, DING XX. Region of interest coding based on multiple bitplanes interleaving [J]. Chongqing: International Computer Congress on Wavelet Analysis and Its Applications and Active Media Technology, 2004, 1 (2): 851-856.
  • 7JOAN BR, JOAN SS, FRANCESC AL. JPEG2000 ROI coding with fine-grain accuracy through rate-distortion optimization techniques [J]. IEEE signal proeessing letters, 2009, 16(1): 45-48.
  • 8田冬庚.JPEG2000标准中的ROI编码方法研究[M].西安电子科技大学,2006.

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计算机科学
2009年 第12期

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