Problem figuring out shift in image

harshil meena

2016 6 13

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4 次查看（30 天）

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I have shifted the first image (scroll_init) slightly to scroll_fin and am using 2-D cross correlation to figure out the difference.

My code is :

sc_in = imread('C:\Users\Harshil\Desktop\SURA\Resources\scroll_init.png');
sc_in = double(rgb2gray(sc_in));
sc_fin = imread('C:\Users\Harshil\Desktop\SURA\Resources\scroll_fin.png');
sc_fin = double(rgb2gray(sc_fin));
cc = xcorr2(sc_fin,sc_in);
[max_cc, imax] = max(abs(cc(:)));
[ypeak, xpeak] = ind2sub(size(cc),imax(1));
figure
plot(cc(:))
title('Cross-Correlation')
hold on
plot(imax,max_cc,'or')
hold off
text(imax*1.05,max_cc,'Maximum')
corr_offset = [(ypeak-size(sc_in,1)) (xpeak-size(sc_in,2))];
disp(corr_offset);