摘要
通过对非下采样Contourlet变换(NSCT)滤波器组合及图像融合规则性能的研究,比较了不同条件得到的融合结果,全面分析了各种融合规则对融合性能的影响。提出低通子带区域能量取大,高频子带方差加权取大和绝对值取大相结合的融合算法。相比基于传统规则的NSCT算法,所提出算法的融合质量及各项指标都有明显提高。实验结果表明,选取合适的滤波器组合和融合规则,即使分解层数较少,方向数不大,也能够获得理想的融合效果,同时还可有效减少融合算法的复杂度。
Effects of the nonsubsampled contourlet transform（NSCT） were analysed and the fusion results using different filters and fusion rules were compared.An efficient fusion method was proposed fusing the low-frequency coefficients based on region energy rule and the directional high-frequency coefficients based on region variance or weighted region variance and coefficient absolute value rules.Experimental results showed the improved fusion quality compared with the traditional NSCT algorithm.Appropriate filter combination and fusion rules could bring a satisfying fusion result even with less decomposing levels and directional banks.Besides,the proposed method could reduce the fusion algorithms complexity.
出处
《中国生物医学工程学报》
CAS
CSCD
北大核心
2010年第4期509-516,共8页
Chinese Journal of Biomedical Engineering
基金
江苏省高校科技成果转化项目(JHZD09-22)
徐州市科技计划项目(XM09B070)
