How to test SfM for multiple view?

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Joe Joe
Joe Joe 2017-9-7
评论： Abdalmalek Abu-Raddaha 2022-3-3
Hello everyone, I try to test the SfM with my own data. I want to know
(1) in this command, load (fullfile(imageDir,'cameraParams.mat')) , Is it need to do camera calibration to load cameraParams.mat? If need, I already try the camera calibration toolbox in matlab, but it's not ok. So, I do the cameraParams.mat in SfM demo folder is moved to my current own image data folder. And then
(2) i use helperEstimateRelativePose , but they showed this error
Error using helperEstimateRelativePose (line 70)
Unable to compute the Essential matrix
Error in sfM_multi_own (line 39) [relativeOrient, relativeLoc, inlierIdx] = helperEstimateRelativePose(matchedPoints1, matchedPoints2, cameraParams);
I don't know how to do and I'm really confused. Please help me! I want to listen for your suggestion seriously.
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Abdalmalek Abu-Raddaha
Abdalmalek Abu-Raddaha 2022-3-3
Have you guys solved this?
I modified the helperEstimateRelativePose function decreased the confidence and increased the max distance but still getting the same error

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回答（1 个）

jhz
jhz 2018-9-20
Consider increasing the maximum distance or decreasing the desired confidence. You can do this by modifying the Matlab built-in function helperEstimateRelativePose.m: line 43. Then you can add as many images as you want. After modification, it should look like this:
[E, inlierIdx] = estimateEssentialMatrix(matchedPoints1, matchedPoints2,...
cameraParams, 'Confidence', 50, 'MaxDistance', 5);
But be careful editing the built-in functions. In my case, I modified the function and saved into another folder by another name and add that folder into path. I hope this will help someone.

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