How can I detect small (less than 1° ) rotations using FFT phase correlation?

조회 수: 3 (최근 30일)
Dana
Dana 2014년 3월 18일
편집: Alex Taylor 2014년 3월 19일
Hi, I'm trying to detect sub-pixel differences between 2 images. All working so far with translation. The rotation method however isn't so accurate with small angles esp the ones that really inteerst me (0.1~ 3). I also upsample my images for better results but still not so accurate. Any advice on what I should edit : log-polar interpolation.. add a filter .. ? Thanks Dana

이 질문에 답변하려면 로그인하십시오.

답변 (2개)

Matt J
Matt J 2014년 3월 18일
Rotation in image space induces translation in radon space. Take the RADON transform of your image and apply the phase correlator to that.
Alex Taylor
Alex Taylor 2014년 3월 19일
편집: Alex Taylor 2014년 3월 19일
If you have R2014a and the Image Processing Toolbox? You should look at imregcorr. It implements phase correlation based registration.
http://www.mathworks.com/help/images/ref/imregcorr.html

카테고리

Help Center 및 File Exchange에서 Geometric Transformation and Image Registration에 대해 자세히 알아보기

태그

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by