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1answer
30 views

Moravec, Harris noisy window

Harris and Stephens writes about the interest window of Moravec: "The response is noisy because the window is binary and rectangular", and suggests applying a Gaussian window. My Question: Why is the ...
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0answers
41 views

Using FAST corner detector to extract rectangles

I try to make some modifications to "ArUco" augmented reality library to make it faster in real time. They are using Canny edge detector to detect fiducial markers, which have rectangular shape. My ...
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0answers
124 views

Corner detection of image in Matlab

I'm trying to detect the corner of a binary image(boundary image)Function using Freeman Chain Code algorithm.Code for corner detection is taken from Matlab Central(function name is "chaincode") I ...
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1answer
442 views

How to understand relationships between ellipse and second moment matrix of Harris corner detector?

guys. I am really lacking in knowledge of linear algebra. I am reading slides of Harris corner. But I am really confused about one of them. I know that I can find corners by two large eigenvalues but ...
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2answers
163 views

Harris Corner Detection

In Harris Corner detection, is there any particular reason why this function is chosen: $R=det(M)-k*trace(M)^2$ We want to a function to evaluate how fast E(u,v) fluctuate accross different ...
3
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1answer
87 views

Keypoint detection with color images

Are there any known methods to use existing keypoint detectors (which generally work on grayscale images) on color images? of course, one could always add the results of the detector on all three ...
3
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1answer
479 views

Keypoint orientation with the oFAST from Rublee's ORB

I've just read the papers from Rublee et al. (ORB: an ef´Čücient alternative to SIFT or SURF) and Rosten et al. (Machine learning for high-speed corner detection) (=fast-detector). Rublee tries to ...
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0answers
96 views

Filtering Corners Detected on Multiple Scales

I made a multi-scale Harris corner detector (inspired by MOPS) which is simply a Harris corner detector performed on several scales (i.e. subsampled versions of the same image). This effectively make ...
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1answer
1k views

Understanding Integration Scale in Multi-Scale Harris Corner Detector

I would like to improve a simple Harris corner detector by adding more scales. I don't need scale-invariant interest points, just to detect more points by processing more scales. The Wikipedia says ...