How to find the displacement in the vertical and horizontal directions( delta x and delta y) and find the angular displacement(ɸ) for image correlation.

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Vishnu Satheedevi
Vishnu Satheedevi 2021-7-20
评论： Marcel Kreuzberg 2021-7-20
As we have found the correlation between two images. And also found the maximum point of correlation..
But dont know how to find the displacement in the vertical and horizontal directions( delta x and delta y)
And find the angular displacement(ɸ)? If any knows, please let me know. Thanks in advance.
The program is as per below...
Img1 = imread('C:\Users\DELL\Desktop\Natures\Nature1.jpg');
Img2 = imread('C:\Users\DELL\Desktop\Natures\Nature2.jpg');
N = 500; range = 1:N;
da = [0 20];
db = [30 30];
dc = [0 20];
dd = [30 30];
A=Img1(da(1) + range, da(2) + range);
B=Img1(db(1) + range, db(2) + range);
C=Img2(dc(1) + range, dc(2) + range);
D=Img2(dd(1) + range, dd(2) + range);
X = normxcorr2(A, B);
m = max(X(:));
[i,j] = find(X == m);
Y = normxcorr2(C, D);
m = max(Y(:));
[k,l] = find(Y == m);
R = zeros(2*N, 2*N);
R(N + range, N + range) = B;
R(i + range, j + range) = A;
R(N + range, N + range) = D;
R(k + range, l + range) = C;
figure
subplot(2,2,1), imagesc(A)
subplot(2,2,2), imagesc(B)
subplot(2,2,3), imagesc(X)
rectangle('Position', [j-1 i-1 2 2]), line([N j], [N i])
subplot(2,2,4), imagesc(R);
subplot(2,2,1), imagesc(C)
subplot(2,2,2), imagesc(D)
subplot(2,2,3), imagesc(Y)
rectangle('Position', [l-1 k-1 2 2]), line([N l], [N k])
subplot(2,2,4), imagesc(S);
delta_orig1 = da - db
%--> [30 10]
delta_recovered = [i - N, j - N]
%--> [30 10]
delta_orig2 = dc - dd
%--> [30 10]
delta_recovered = [k - N, l - N]
%--> [30 10]
Output:

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