Which Is invariant to rotation, SiftFeatureDetector or SiftDescriptorExtractor?

asked 2018-06-23 16:02:31 -0600

Brainabilgh
1 ●1 ●1

updated 2018-06-24 07:58:34 -0600

I am using OpenCV for image recognition and I want to know whether the rotation invariance of cv::SIFT is achieved due to it's detector cv::SiftFeatureDetector or due to it's descriptor cv::SiftDescriptorExtractor. Same thing for cv::SURF.

answered 2018-06-23 19:00:05 -0600

Eduardo
3589 ●1 ●15 ●41

See the following references for accurate information:

Distinctive Image Features from Scale-Invariant Keypoints, SIFT paper
The SIFT (Scale Invariant Feature Transform) Detector and Descriptor, Washington course
SIFT detector and descriptor, VLFeat library

And the following images:

image description

Descriptors are computed with respect to a dominant keypoint orientation.

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Thanks, but I just need to know if invariant to rotation is achieved due to cv::SiftFeatureDetector or it's achieved due to cv::DescriptorExtractor ?

Brainabilgh ( 2018-06-24 07:53:34 -0600 )edit

It's generally a good idea to try to understand what tools you are using. If you clicked any of the links given above you could answer your own question. With the attitude you are expressing, no one will want to help you.

Der Luftmensch ( 2018-06-24 18:26:25 -0600 )edit

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