[ptx] Even more SIFT successes

[Pablo d'Angelo]

On Sun, 18 Jan 2004, Sebastian Nowozin wrote:

> Btw, Pablo, I found a nice criterion for the suitability of a match:
> 
>  w(dist1, dist2) = dist1^e1 * (1 / (dist2 - dist1))^e2

I've just used the criterion from the sift paper, and accept a match
if dist2 < dist1 * 0.6

ciao
  Pablo
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