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浏览/检索结果: 共7条，第1-7条 帮助 限定条件 专题：长春光学精密机械与物理研究所    第一署名单位    第一作者单位    通讯作者单位     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Red emission generation through highly efficient energy transfer from Ce3+ to Mn2+ in CaO for warm white LEDs 期刊论文 Dalton Transactions, 2016, 卷号: 45, 期号: 4 作者:  Feng, L. Y.;  Z. D. Hao;  X. Zhang;  L. L. Zhang;  G. H. Pan 收藏  |  浏览/下载：14/0  |  提交时间：2017/09/11 Fast prediction unit selection method for HEVC intra prediction based on salient regions 期刊论文 Optoelectronics Letters, 2016, 卷号: 12, 期号: 4 作者:  Feng, L.;  M. Dai;  C.-l. Zhao and J.-y. Xiong 收藏  |  浏览/下载：21/0  |  提交时间：2017/09/11 JPEG2000图像压缩关键技术研究及FPGA实现 学位论文 硕士: 中国科学院大学, 2015 作者:  陈占良 收藏  |  浏览/下载：19/0  |  提交时间：2016/04/11 图像压缩  JPEG2000  小波变换  tier2 编码  DDR3 存储器   A compression algorithm of multispectral images based on improved Karhunen-Loeve transform 期刊论文 Guangdianzi Jiguang/Journal of Optoelectronics Laser, 2015, 卷号: 26, 期号: 6, 页码: 1200-1205 作者:  Xu, D.-D.;  T.-J. Fu;  Y. Zhang;  X.-X. Zhang and J.-Y. Ren 收藏  |  浏览/下载：13/0  |  提交时间：2016/08/24 An image compression method for space multispectral time delay and integration charge coupled device camera 期刊论文 Chinese Physics B, 2013, 卷号: 22, 期号: 6 Li J.; Jin L. X.; Zhang R. F. 收藏  |  浏览/下载：11/0  |  提交时间：2014/05/14 Image coding using wavelet-based compressive sampling (EI CONFERENCE) 会议论文 2012 5th International Symposium on Computational Intelligence and Design, ISCID 2012, October 28, 2012 - October 29, 2012, Hangzhou, China Jin L.; Li J. 收藏  |  浏览/下载：34/0  |  提交时间：2013/03/25 In this paper  we proposed a novel coding scheme is proposed using wavelet-based CS framework for nature image. First  two-dimension discrete wavelet transform (DWT) is applied to a nature image for sparse representation. After multi-scale DWT  the low-frequency sub-band and high-frequency sub-bands are re-sampled separately. According to the statistical dependences among DWT coefficients  we allocate different measurements to low- and high-frequency component. Then  the measurements samples can be quantized. The quantize samples are entropy coded and forward correct coding (FEC). Finally  the compressed streams are transmitted. At the decoder  one can simply reconstruct the image via l1 minimization. Experimental results show that the proposed wavelet-based CS scheme achieves better compression performance against the relevant existing solutions.   Storage and compression design of high speed CCD (EI CONFERENCE) 会议论文 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, November 19, 2008 - November 21, 2008, Chengdu, China Cai X.; Zhai L. P. 收藏  |  浏览/下载：45/0  |  提交时间：2013/03/25 In current field of CCD measurement  large area and high resolution CCD is used to obtain big measurement image  so that  speed and capacity of CCD requires high performance of later storage and process system. The paper discusses how to use SCSI hard disk to construct storage system and use DSPs and FPGA to realize image compression. As for storage subsystem  Because CCD is divided into multiplex output  SCSI array is used in RAID0 way. The storage system is composed of high speed buffer  DMA controller  control MCU  SCSI protocol controller and SCSI hard disk. As for compression subsystem  according to requirement of communication and monitor system  the output is fixed resolution image and analog PAL signal. The compression means is JPEG2000 standard  in which  9/7 wavelets in lifting format is used. 2 DSPs and FPGA are used to compose parallel compression system. The system is composed of FPGA pre-processing module  DSP compression module  video decoder module  data buffer module and communication module. Firstly  discrete wavelet transform and quantization is realized in FPGA. Secondly  entropy coding and stream adaption is realized in DSPs. Last  analog PAL signal is output by Video decoder. Data buffer is realized in synchronous dual-port RAM and state of subsystem is transfer to controller. Through subjective and objective evaluation  the storage and compression system satisfies the requirement of system. 2009 SPIE.