radon_t.m

用于进行车牌校正的程序

clc;
clear all

tic
Im = imread('dt666.jpg');

I = rgb2gray(Im);
imshow(I)
theta = -20:1:20;

[R,Xp] = radon(I,theta);
% figure (1)
% plot(Xp,R(:,1),'-',Xp,R(:,2),'-.',Xp,R(:,3),'--')
% legend('实线代表0度投影','点虚线代表-8度投影','虚线代表14度投影',4)
% title('对lena图像0度，-8度和14度的投影后落差对比图')
% xlabel('Radon变换中的x’坐标')
% ylabel('Radon变换中的y’坐标')

diff_R = diff(R');

abs_diff_R = abs(diff_R);
sum_diff_R = sum(diff_R,2);
sum_abs_diff_R = sum(abs_diff_R,2);


toc
figure (2)
stem(sum_abs_diff_R);