资源简介
ART算法代码程序
代码片段和文件信息
clc;
clear all;
close all;
N = 180; %图像大小
N2 = N^2;
I = phantom(N);% 产生头模型图像
theta = linspace(0180181);
theta = theta(1:180);
%% = = = = = = 产生投影数据 = = = = = = %%
P_num = 260; %探测器通道个数
P = ParallelBeam(theta N P_num); %产生投影数据
%P = radon(Itheta);
%% = = = = = = 获取投影矩阵 = = = = = =%%
delta = 1;% 网格大小,角度增量
[W_indW_dat] = SystemMatrix(thetaNP_numdelta);
%% = = = = = = 进行ART迭代 = = = = = = %%
F = zeros(N21); %初始图像向量
lambda = 0.25; %松弛因子
c = 0; %迭代计数器
irt_num = 5;
while(c for j = 1:length(theta)
for i = 1:1:P_num
% 取得一条射线所穿过的网格编号和长度
u = W_ind((j-1)*P_num + i:); % 编号
v = W
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