CT滤波反投影图像重建算法的反投影计算量问题-CT filtered back projection back-projection image reconstruction algorithm computational problems

线性反投影算法（Linear Back Projection，简称 LBP）又称累加法，是最早使用的一种简单（ECT图像重建）成像算法。它将通过某点的所有投影射线进行累加，再反向估算出该点的密度值。从成像观点分析，它是不完全的雷登逆变换（完整的雷登逆变换包括微分、希尔伯特变换、反投影和归一化等步骤）。-Linear back projection algorithm (Linear Back Projection, referred LBP), also known as cumulative

距离驱动投影反投影算法，GE公司推崇的CT算法-Distance driven projection back projection algorithm, GE company respected CT algorithm

This paper introduces a new object tracking method which combines two algorithms working in parallel, and based on low-level observations (colour and gradient orientation): the Generalised Hough Transform, using a pixel-based descr iption, and