How to align two images together automatically: Round 2

Question

Frank 2011-5-18

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/7703-how-to-align-two-images-together-automatically-round-2

Hello!

I have my images closely aligned, but not close enough. Is there anyway I can improve object selection in an image or getting the centroid more accurately/ consistently? I have been using this script to locate the centroid of both images and Sean De's imtranslate to modify the image.

Thanks

-Frank

Image

Code

%First Image
i = imread('343TESTA.tif');
j = size(i);
imtool(i);
for k = 1:j(1)
    for l = 1:j(2)
        if i(k,l) > 160 & i(k,l) > 160
            d(k,l) = 1;
        else
       d(k,l) = 0;
        end
    end
end
imtool(d);
labela = bwlabel(d);
imagesc(labela);
[labela,num] = bwlabel(d,4);
stats = regionprops(labela,'basic');
stats(1).Area
stats(1).Centroid
max_area = max([stats.Area]);
biggrain = find([stats.Area]== max_area);
p = stats(biggrain).Centroid
%Second Image
a = imread('343TESTB.tif');
b = size(a);
imtool(a);
for c = 1:b(1)
    for l = 1:b(2)
        if i(c,l) > 160 & a(c,l) > 160
            e(c,l) = 1;
        else
       e(c,l) = 0;
        end
    end
end
imtool(e);
labelb = bwlabel(e);
imagesc(labelb);
[labelb,num] = bwlabel(e,4);
stats = regionprops(labelb,'basic');
stats(1).Area
stats(1).Centroid
max_area = max([stats.Area]);
biggrain = find([stats.Area]== max_area);
o = stats(biggrain).Centroid
%Calculates the differences in the centroid
displacement = p -o
%IM Translate
v = imread('343TESTA.tif');
u = imread('343TESTB.tif');
u2 = imtranslate(u, [0 -1.0376]); %Note: [y x] for imtranslate
subplot(1,2,1), imshow(v)
subplot(1,2,2), imshow(u2)
imwrite(u2, '343TESTC','tif');

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Frank 2011-5-18

I'm using Fiji (ImageJ variant) to see how this script aligns the images. Stackreg isn't good because it moves the image up and down, I only want left and right alignment.

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