Wikipedia defines hessian of Difference of Gaussians as(adsbygoogle = window.adsbygoogle || []).push({});

and earlier in the page uses D for difference of gaussians,

So do i just need D(x,y) or do i need d/dx D(x,y) for the elements? If so how does one go about differentiating DoG?

Any help appreciated

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# SIFT is derivative of DoG needed for Hessian or just DoG?

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