Finding Intersection Points with Template matching

Question

Sivaguru Siva 2018-7-9

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/409395-finding-intersection-points-with-template-matching

Hi Everyone,

I'm trying to perform template matching to find the all the intersection point on a checkerboard(Black and white only). The image i'm trying to use is: 3cross2.png(background), 10by10.jpg(template);(attachments).

For the background i used the value: Lion

I used the code: (The Problem is i can only get one point, how do i detect all the points)

          clc, clear all, close all 
          % Read Lion
          lion = imread('3cross2.png');
          lion =rgb2gray(lion);
          % imshow(lion); figure() 
          % Read Template 
          Template = imread('10by10t.jpg');
          template = rgb2gray(Template);
          % imshow(template)
          [RowLionT, ColLionT] = size(template) 
          sprintf('The size of letter is %dx%d.',RowLionT,ColLionT)
          [RowLion, ColLion] = size(lion) 
          sprintf('The size of letter is %dx%d.',RowLion,ColLion)
          cc=normxcorr2(template,lion);
          [val, idx] = max(cc);
          [RowCC, ColCC] = size(cc) 
          sprintf('The size of letter is %dx%d.',RowCC,ColCC)
          imshow(cc) 
          [max_cc,imax] = max(abs(cc(:))); 
          sprintf('The the highest correlation value is %f.',max_cc)
          [ypeak,xpeak] = ind2sub(size(cc),imax(1)); 
          sprintf('the row col coords of the best match in the cross corr matrix are %dx%d.',ypeak,xpeak) 
          BestRow = ypeak - (RowLionT-1); 
          BestCol = xpeak - (ColLionT-1); 
          sprintf('The Row Col coordinates of the best match in orig matrix are %d %d.',BestCol,BestRow)
          figure,imshow(lion);
          hold on
          o = plot((BestCol+((ColLionT-1)/2)), (BestRow+((RowLionT-1)/2)), 'ro', 'MarkerSize', 10);