About the Harris determinant

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diane
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Registriert: 21. Jun 2009 17:33

About the Harris determinant

Beitrag von diane »

A question I had today:
Why is the determinant of the matrix not 0 in the Harris detector?

If you look at the interest points slides, slide 17, you can see that you need to apply the Gaussian convolution to the 2x2 matrix before extracting the determinant.
The illustrations on the same slide already give a good intuition that g(Ix²)g(Iy²) and g(IxIy)² will produce different results.
At the end, the cornerness function is given below, and terms don't cancel.

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