机构

• 软件研究所 [2]
• 长春光学精密机械与物... [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

• 2014 [1]
• 2011 [1]
• 2010 [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 基于有向图构造的卫星遥感图像认证算法 期刊论文  OAI收割 宇航学报, 2014, 卷号: 35, 期号: 5, 页码: 581-589 易小伟; 马恒太; 郑昌文; 胡晓惠; 郑刚   |  收藏  |  浏览/下载：35/0  |  提交时间：2014/12/16 图像认证  CCSDS图像数据压缩  码流特征  认证图  丢包鲁棒  Image authentication  CCSDS image data compression  Codestream characteristics  Authentication graph  Robustness to packet loss   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：95/0  |  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.   a scalable encryption scheme for ccsds image data compression standard 会议论文  OAI收割 2010 IEEE International Conference on Information Theory and Information Security, ICITIS 2010, Beijing, 40878 Mingyu Li; Xiaowei Yi; Hengtai Ma   |  收藏  |  浏览/下载：26/0  |  提交时间：2011/03/31 CCSDS image data compression standard  ciphertext bitstream  end-to-end security  low-complexity transparent transcoding  near rate-distortion  packet header  scalable encryption scheme  truncation points  cryptography  data compression  image coding  transcoding