The function rectifyStereoImages can't return reprojectionMatrix.with an error "Error using rectifyStereoImages Too many output arguments."

Input data:

to_reg e rif contain 2 images converted in grey level, I tried to attach but mages are bigger than 5 Mb

ptsreg = detectSURFFeatures(to_reg);

ptsrif = detectSURFFeatures(rif);

[featreg,validPtsreg] = extractFeatures(to_reg,ptsreg);

[featrif,validPtsrif] = extractFeatures(rif,ptsrif);

index_pairs = matchFeatures(featrif,featreg,'MatchThreshold',sogliaMatch);

matchedPtsrif = validPtsrif(index_pairs(:,1));

matchedPtsreg = validPtsreg(index_pairs(:,2));

[fund,inlierF] = estimateFundamentalMatrix(matchedPtsrif, matchedPtsreg,Method=tipostimaF);

figure;

showMatchedFeatures(rif,to_reg,matchedPtsrif(inlierF,:),matchedPtsreg(inlierF,:),"montage",PlotOptions=["ro","go","y--"]);

title("Point Matches After Outliers Are Removed");

This is the figure

[t1, t2] = estimateUncalibratedRectification(fund,matchedPtsrif(inlierF,:),matchedPtsreg(inlierF,:),size(to_reg));

Now, the problem is in next command line. If I run this

[rifRect,to_regRect] = rectifyStereoImages(rif,to_reg,t1,t2, OutputView='full');

figure;

imshow(stereoAnaglyph(rifRect,to_regRect));

the program correctly run.

If I run this

[rifRect,to_regRect,reprojectionMatrix] = rectifyStereoImages(rif,to_reg,t1,t2, OutputView='full');

the program gives me the error:

Error using rectifyStereoImages

Too many output arguments.

Error in ObjectExtraction_v0 (line 75)

[rifRect,to_regRect,reprojectionMatrix] = rectifyStereoImages(rif,to_reg,t1,t2, OutputView='full');

I need the reprojectionMatrix because I want to generate apply the function reconstructScene

Answer 1

[Varun]

Hello!

I believe the error is due to improper syntax while calling the rectifyStereoImages function. When using the syntax for getting a reprojectionMatrix, the function call must be in the format:

[rifRect,to_regRect,reprojectionMatrix] = rectifyStereoImages(rif,to_reg,stereoParams);

To know more, please refer to https://www.mathworks.com/help/vision/ref/rectifystereoimages.html#d124e243545 for documentation on rectifyStereoImages and https://www.mathworks.com/help/releases/R2022b/vision/ref/reconstructscene.html#d124e242860 for documentation and examples on reconstructScene.

Hope this helps!