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  • 2006 [11]
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Compression of remote sensing image based on Listless Zerotree Coding and DPCM - art. no. 60310H 会议论文  OAI收割
2006
Chen S. L.; Huang L. Q.
收藏  |  浏览/下载：7/0  |  提交时间：2013/03/28
Compression of remote sensing image based on Listless Zerotree Coding and DPCM (EI CONFERENCE) 会议论文  OAI收割
ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China
Chen S.-L.; Huang L.-Q.
收藏  |  浏览/下载：21/0  |  提交时间：2013/03/25
The data quantity of remote sensing image is very large. Furthermore  the lowest frequency subband contains the main energy of original image and reflects the coarse of original image after remote sensing image is transformed by wavelet  so it is very important to the reconstructed image. Therefore a hybrid image compression method based on Listless Zerotree Coding (LZC) and DPCM is presented  namely  the lowest frequency subband is compressed by DPCM and others are compressed by LZC. LZC is a kind of zerotree coding algorithm for hardware implementation  which is based on SPIHT and substitutes two significant bit maps for three lists in SPIHT algorithm. Thereby LZC significantly reduces the memory requirement and complexity during encoding and decoding procedure. But LZC doesn't recognize the significance of grandchild sets  so the PSNR values of LZC are lower than SPIHT's and the compression speed drops. It is improved by adding a significant bit map that recognizes the significance of grandchild sets. A comparison reveals that the PSNR results of the hybrid compression method are 2 dB higher than those of LZC  and the compression speed is also improved.  
A new segmentation method of CR images based on discrete wavelet transform and mathematics morphology - art. no. 60273H 会议论文  OAI收割
2006
作者:  Li Z.;  Li Z.
收藏  |  浏览/下载：7/0  |  提交时间：2013/03/28
A new segmentation method of CR images based on discrete wavelet transform and mathematics morphology (EI CONFERENCE) 会议论文  OAI收割
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
作者:  Li Z.;  Li Z.
收藏  |  浏览/下载：26/0  |  提交时间：2013/03/25
In this paper  we propose a segmentation method of CR(computed radiography) images with being rid of under-segmentation and over-segmentation. An under-segmentation occurs when pixels belonging to different objects are grouped into a single region. Such errors are the most dangerous because they can invalidate the whole segmentation process. The phenomenon always takes place when we segment CR images because of the principle of CR. In order to depressed under-segmentation  we enhance the CR images using DWT (discrete wavelet transform) to get more detail of CR image features. As we enhance the CR image  the over-segmentation maybe occurs. Compared with under-segmentation  the over-segmentation occurs when a single objects is subdivided by segmentation into several region. For the purpose of preventing from the over-segmentation  we present a scheme for enhanced CR images based on watershed algorithm that solves over-segmentation problem. We use marker-based watershed algorithm. Together with gradient image and marker image  watershed segmentation can make sure to partition CR image into meaningful object and avoid further segmentation of homogeneous regions. The result of the proposed algorithm are compared with those of other standard methods. Experiments have shown a better result and indeed solved under-segmentation and over-segmentation problems.  
An Experimental Investigation Into Turbine Flutter Characteristic at Different Tip-Clearances 会议论文  OAI收割
ASME:STRUCTURES AND DYNAMICS: UNSTEADY AERODYNAMICS, 2006
X. Q. Huang, L. He, and D. L. Bell
收藏  |  浏览/下载：4/0  |  提交时间：2011/11/28
An Experimental Investigation Into Turbine Flutter Characteristic at Different Tip-Clearances 会议论文  OAI收割
2006
X. Q. Huang, L. He, and D. L. Bell
  |  收藏  |  浏览/下载：2/0  |  提交时间：2011/11/28
behavior-based trust in wireless sensor network 会议论文  OAI收割
8th Asia-Pacific Web Conference and Workshops (APWeb 2006), Harbin, PEOPLES R CHINA, JAN 16-18,
Huang L; Li L; Tan Q
  |  收藏  |  浏览/下载：6/0  |  提交时间：2011/07/28
The Low Emittance Photoinjector in Tsinghua University 会议论文  OAI收割
Proceedings of the 23th Linear Accelerator Conference, Tennessee USA, 2006
作者:  C.-X.Tang;  Q.Du;  Y.-C.Du;  X.He;  W.-H.Huang
收藏  |  浏览/下载：17/0  |  提交时间：2016/10/09
Identifying the breeding areas of locusts in the Yellow River estuary using Landsat ETM+ imagery - art. no. 62000G 会议论文  OAI收割
Proceedings of the Society of Photo-Optical Instrumentation Engineers (Spie)
Liu Q. S.; Liu G. H.; Yang Y. Z.; Liu P.; Huang J. J.
收藏  |  浏览/下载：20/0  |  提交时间：2012/06/30
Influence of dispersive coupling coefficient in microring channel drop filters 会议论文  OAI收割
8th international conference on transparent optical networks, nottingham, england, jun 18-22, 2006
Chen Q (Chen Qin); Yang YD (Yang Yue-De); Huang YZ (Huang Yong-Zhen)
收藏  |  浏览/下载：192/39  |  提交时间：2010/03/29