机构

• 长春光学精密机械与物... [2]
• 沈阳自动化研究所 [1]

采集方式

• OAI收割 [3]

内容类型

• 会议论文 [2]
• 期刊论文 [1]

发表日期

• 2020 [1]
• 2007 [1]
• 2005 [1]

学科主题

筛选

浏览/检索结果: 共3条，第1-3条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Effect of point spread function position bias in wavefront coding infrared imaging system 期刊论文  OAI收割 Journal of Optics (United Kingdom), 2020, 卷号: 22, 期号: 2, 页码: 1-10 作者:  Feng B(冯斌);  Shi ZL(史泽林);  Liu HZ(刘海峥);  Zhao YH(赵耀宏);  Zhang, Jianlei   |  收藏  |  浏览/下载：20/0  |  提交时间：2020/03/22 wavefront coding  infrared imaging  PSF  position bias  decoded image   High speed, low memory image coding using zero blocks of wavelet coefficients (EI CONFERENCE) 会议论文  OAI收割 4th International Conference on Image and Graphics, ICIG 2007, August 22, 2007 - August 24, 2007, Chengdu, China 作者:  Zhang T.;  Yang W.-G. 收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25 We propose a new high speed  low memory SPECK image coder based on the form of block-unit states  called LBUS-SPECK  which uses the form of block-unit states and the form of block exponents to substitute LIS and LSP of SPECK. A form of block-unit states is introduced to store the significance flag of coefficients and the value of the block-unit exponents. A form of block exponents is introduced to store the block exponents which are used to represent the max coefficient in a decomposed block. A new block depth-finding strategy is developed for searching insignificant sets at sorting stage. Experimental results show that the obtained PSNR values for the decoded images are very close to those of SPECK algorithm and the memory consumption is reduced by 9 times  the encoding timing is saved about 15%. Comparing with SPECK algorithm  this algorithm not only has better performance of the decoded images  but also is easy to implement  especially  it provides an efficient way for hardware implementation of wavelet embedded block coding. 2007 IEEE.   The improving speed post-processing technique for blocking artifact in transform coded images (EI CONFERENCE) 会议论文  OAI收割 Seventh IASTED International Conference on Signal and Image Processing, SIP 2005, August 15, 2005 - August 17, 2005, Honolulu, HI, United states 作者:  Wang H.;  He B.;  Wang H. 收藏  |  浏览/下载：21/0  |  提交时间：2013/03/25 Based on the technique [1] and the gradient continuity of natural image  an improving speed post-processing technique for the blocking artifact in transform coded image at low bit rate is presented. Moreover  the detecting function is applied to extract the adjacent two blocks with the blocking artifact and is combined with the DCT-based adaptive post-processing technique [1] for reducing the blocking artifacts of the decoded image. The new technique is used to process JPEG compressed image and results show improvement in both effective DCT operation and peak-signal to noise ratio (PSNR) with preserving the image quality.