中国科学院机构知识库网格系统: 检索

基于自适应补偿的电子稳像方法 期刊论文 OAI收割
激光与红外, 2017, 期号: 11, 页码: 1438-1445
作者: 尹丽华; 李范鸣; 刘士建

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收藏 | 浏览/下载：41/0 | 提交时间：2018/11/20

电子稳像自适应参数迭代图像镶嵌 PSNR

基于GPU的JPEG2000图像压缩编码技术的研究 学位论文 OAI收割
硕士, 北京: 中国科学院大学, 2016
作者: 白兆峰

收藏 | 浏览/下载：30/0 | 提交时间：2016/05/26

图像压缩技术 JPEG2000标准 GPU CUDA 并行计算编码耗时 PSNR

Image quality assessment based on complex representation of structure information (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electrical, Information Engineering and Mechatronics, EIEM 2011, December 23, 2011 - December 25, 2011, Jiaozuo, Henan, China
作者: Wang Y.; Wang Y.; Wang Y.; Wang Y.; Wang Y.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

Local variance and single pixel value are combined to describe image structure information using complex method in this paper in order to improve the consistency of objective image assessment result with that of subjective method. The effect of the detail structure information on the image quality was emphasized by this method accordingly. Singular value decomposition was performed on local variance distribution complex matrix. The angle between the singular value vectors of the reference image and the disturbed image was used to measure their structural similarity. Then the quality assessment process was achieved. Results from experiments show that the proposed method is better consistent with human visual system characteristics than MSE PSNR and SSIM. 2012 Springer-Verlag London Limited.

Image quality assessment based on gradient complex matrix (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Systems and Informatics, ICSAI 2012, May 19, 2012 - May 20, 2012, Yantai, China
作者: Wang Y.; Wang Y.; Wang Y.; Wang Y.; Wang Y.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

An image quality assessment model based on gradient complex matrix is proposed. The vertical and horizontal gradient information of grayscale image is calculated. Complex number is used to construct the measuring matrix. Singular value decomposition is performed in order to obtain the main structure information of the image. The singular value feature vectors of the image gradient complex matrices corresponding to the reference image and the distorted image are used to measure the structural similarity of the two images. PSNR is taken as a tool to evaluate the gradient distribution similarity. Their properties are analyzed by using LIVE database and nonlinearity regression function. 2012 IEEE.

Hyperspectral Image Compression Technology Research Based on EZW 期刊论文 OAI收割
spectroscopy and spectral analysis, 2011, 卷号: 31, 期号: 8, 页码: 2283-2286
作者: Wei Jun-xia; Xiangli Bin; Duan Xiao-feng; Xu Zhao-hui; Xue Li-jun

收藏 | 浏览/下载：27/0 | 提交时间：2012/06/29

Hyperspectral EZW PSNR MSE

Efficient rate control technique for CCSDS image encoding (EI CONFERENCE) 会议论文 OAI收割
IEEE 2nd International Conference on Computing, Control and Industrial Engineering, CCIE 2011, August 20, 2011 - August 21, 2011, Wuhan, China
Jin L.

收藏 | 浏览/下载：91/0 | 提交时间：2013/03/25

For the limitation of data transmission bandwidth and real time transmission demand generally image compression is required to implement the precise and flexible rate control algorithm. Rate control is an important issue in the image compression field. This paper considers the problem of rate allocation to each encoded segment for CCSDS image compression. One straightforward method is to allocate an equal amount of rate to each segment based on the average of the total number of compressed bytes. The obvious drawback of this method is that different segment will be reconstructed to different quality so the overall quality of the reconstructed image will not be optimized. For the shortage of the original rate control method as to improve the overall quality of the reconstructed image an improved rate control algorithm is proposed for CCSDS image encoding. The key component of the proposed rate control method is the appropriate rate allocation. Experiments on the test images show that the PSNR can be increased at about 0.3dB on average compared to the original algorithm. Therefore experimental results confirm the effectiveness of the proposed algorithm in terms of objective evaluation and the rate-distortion performance of the reconstructed image is improved. 2011 IEEE.

Image compression algorithm of high-speed SPIHT for aerial applications (EI CONFERENCE) 会议论文 OAI收割
2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011, May 27, 2011 - May 29, 2011, Xi'an, China
作者: Zhang K.; Zhang K.; Zhang K.; Zhang K.

收藏 | 浏览/下载：38/0 | 提交时间：2013/03/25

SPIHT and NLS (Not List SPIHT) are efficient compression algorithms but the algorithms application is limited by the shortcomings of the poor error resistance and slow compression speed in the aviation and other areas requiring high-speed compression. In this paper the error resilience and the compression speed are improved. The remote sensing images are decomposed by Le Gall5/3 wavelet and wavelet coefficients are indexed scanned and allocated by the means of family blocks. The bit-plane importance is predicted by bitwise OR so the N bit-planes can be encoded at the same time. Compared with the SPIHT algorithm this modified algorithm is easy implemented by hardware and the compression speed is improved. The PSNR of reconstructed images encoded by high-speed SPIHT is slightly lower than SPIHT at rate 1bpp but the speed is 4.5-6 times faster than SPIHT encoding process. The algorithm meets the high speed and reliability requirements of aerial applications. 2011 IEEE.

New time dependent pretreat models based on total variational image restoration 期刊论文 OAI收割
ACTA MATHEMATICAE APPLICATAE SINICA-ENGLISH SERIES, 2011, 卷号: 27, 期号: 1, 页码: 129-140
作者: Xu, Jing; Chang, Qian-shun

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收藏 | 浏览/下载：20/0 | 提交时间：2018/07/30

Total variation image restoration level set motion anisotropic diffusion PSNR

A novel de-noising method based on Independent Component Analysis(ICA) for DMD based Hadamard Transform Spectral Imager 会议论文 OAI收割
2011 cross strait quad-regional radio science and wireless technology conference, csqrwc 2011, harbin, china, july 27, 2011 - july 30, 2011
作者: HuBingLiang; LiuCaiFang; QianQingMing; TanXiaoBing

收藏 | 浏览/下载：16/0 | 提交时间：2012/07/09

De-Noising leA DMD Hadamard Transform PSNR

Image compression based on contourlet and no lists SPIHT (EI CONFERENCE) 会议论文 OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
作者: Zhang S.

收藏 | 浏览/下载：45/0 | 提交时间：2013/03/25

The volume of raw image data captured by the high resolution camera is extremely huge. Thus the efficient image compression method should be used to decrease the bit rate. The image compression method based on wavelet is used more widely nowadays. However two dimensional wavelet is only the tensor product of the one dimensional wavelet whose support region of basis function is extended from interval to square. Contourlet is an image multiscale geometric analysis tool which could represent image sparsely and has strong capability of nonlinear approximation. The basis function of contourlet is multidirectional and anisotropic. Nevertheless contourlet is redundant. So the non-redundant Wavelet Based Contourlet Transform (WBCT) is used in this paper. The SPIHT algorithm is very efficient way to coding the significant coefficients. And the improved no lists SPIHT is more easy to implemented by hardware. Image compression method based on the combination of both wavelet based contourlet transform and no lists SPIHT coding is proposed in the paper. Experiment shows that compared to wavelet based scheme the contourlet scheme can reserve the texture of the image. For barbara test image when coding at low bit rate the PSNR can improve about 0.2dB. 2010 IEEE.