image - 如何使用归一化相关查找多个匹配模式

Question

我正在使用 normxcorr2 找到与我的模式完全匹配的区域，并且我还想找到看起来像模式的其他区域（在红色矩形中）。我认为如果我能找到下一个最大值等等，并且该值不能在第一个最大区域或已检测到但我做不到的第一个最大区域中，它将是有效的。或者，如果您有任何使用 normxcorr2 查找其他区域的想法，请告诉我，我根本不知道。
这是我的代码。我从这个http://www.mathworks.com/products/demos/image/cross_correlation/imreg.html修改

onion = imread('pattern103.jpg'); %pattern image
peppers = imread('rsz_1jib-159.jpg'); %Original image

onion = rgb2gray(onion);
peppers = rgb2gray(peppers);

%imshow(onion)
%figure, imshow(peppers)

c = normxcorr2(onion,peppers);
figure, surf(c), shading flat

% offset found by correlation
[max_c, imax] = max(abs(c(:)));
[ypeak, xpeak] = ind2sub(size(c),imax(1));
corr_offset = [(xpeak-size(onion,2))
               (size(onion,1)-ypeak)]; %size of window show of max value 

offset = corr_offset;
xoffset = offset(1);
yoffset = offset(2);

xbegin = round(xoffset+1); fprintf(['xbegin = ',num2str(xbegin)]);fprintf('\n');
xend   = round(xoffset+ size(onion,2));fprintf(['xend = ',num2str(xbegin)]);fprintf('\n');
ybegin = round(yoffset+1);fprintf(['ybegin = ',num2str(ybegin)]);fprintf('\n');
yend   = round(yoffset+size(onion,1));fprintf(['yend = ',num2str(yend)]);fprintf('\n');

% extract region from peppers and compare to onion
extracted_onion = peppers(ybegin:yend,xbegin:xend,:);
if isequal(onion,extracted_onion)
   disp('pattern103.jpg was extracted from rsz_org103.jpg')
end

recovered_onion = uint8(zeros(size(peppers)));
recovered_onion(ybegin:yend,xbegin:xend,:) = onion;
figure, imshow(recovered_onion)

[m,n,p] = size(peppers);
mask = ones(m,n);
i = find(recovered_onion(:,:,1)==0);
mask(i) = .2; % try experimenting with different levels of
              % transparency

% overlay images with transparency
figure, imshow(peppers(:,:,1)) % show only red plane of peppers
hold on
h = imshow(recovered_onion); % overlay recovered_onion
set(h,'AlphaData',mask)