摘要
对JPEG-LS图像压缩方案的编码特性进行数据分析,提出一阶码率控制策略与二阶码率控制策略,有效地实现了近无损图像编码过程中的码率动态调整。实验证明,该码率控制解决方案运算量小、收敛性好,能够有效抑制码率的大幅波动,在目标码率下可以稳定输出压缩码流,保证了编码图像的质量。
This paper proposes coding performance of JPEG-LS image compression algorithm. One-rank rate control scheme and two-rank rate control scheme are proposed to perform dynamic rate control efficiently during the near lossless coding procedure. Experimental results show that these rate-control solutions have low operation requirement and good property of convergence. The fluctuation of bit-rate is effectively reduced. The compressed bit-stream is outputted stably under target bit-rate, and image compression quality is promoted.
出处
《计算机工程》
CAS
CSCD
北大核心
2008年第7期238-239,271,共3页
Computer Engineering
基金
国家部委基金资助项目
关键词
图像
码率
控制
image
rate
control
