改进的正交匹配追踪超声图像重构算法

摘要

For problems of longer time and poor quality of ultrasonic image reconstruction in the orthogonal matching pursuit (OMP) algorithm,with the idea of SP algorithm the conjugate gradient method is replaced by the least square method to calculate the estimated value and further get reconstruction image in simulation experiment.It uses PSNR value and reconstruction time to analyze the quality.The results show that the improved algorithm can effectively reduce the reconstruction time and improve the quality of image.%针对正交匹配追踪(OMP)算法中超声图像重构时间较长、重构质量不佳的问题,通过结合SP算法的思想,采用共轭梯度算法替换OMP算法中的最小二乘法求取估计值进行图像重构的仿真实验,采用图像的PSNR值以及重构时间进行质量分析,实验结果表明:改进算法能够有效减少重构时间,提高图像的重构质量.