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浏览/检索结果: 共2条，第1-2条 帮助 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 兴趣区域优先的多尺度压缩感知渐进编码算法 期刊论文 光电子·激光, 2015, 卷号: 26, 期号: 10, 页码: 2016-2022 作者:  杜梅;  赵怀慈;  赵春阳 收藏  |  浏览/下载：21/0  |  提交时间：2015/11/23 感兴趣区域(ROI)  渐进编码  多尺度压缩感知(CS)  基于小波的轮廓变换(WBCT)  边界平滑   Efficient rate control technique for CCSDS image encoding (EI CONFERENCE) 会议论文 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：86/0  |  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.