SURF percentage point options

Question

I want to give alternative points of interest as input to SURF using the -p1 command (I use the authors implementation: http://www.vision.ee.ethz.ch/~surf/download.html ). But I'm not sure what to do with the parameters.

I need to give x,y,a,b,cfor each point of interest both according to README, a=cand radius= 1/a^2(at the same time they [a,b;b,c]are entries of the second matrix of the moment). But when I look at the network intrusion detection output file, the parameter a, c is always very small (for example, 0.003). If radius=1/a^2, then this will give the radius of the 1/(0.003^2) > 100.000pixel region . Am I misinterpreting the README file or parameters a,cthat believe incorrectly?

Answer 1

I think the README file is misleading. If you see the code. its actually a = 1 / radius ^ 2. This will put a radius of about 20 pixels in your example. go through main.cpp in the library to find out how a is calculated.

Answer 2

Krish is probably right about the radius. Unfortunately, I do not remember. About other options you can use.

: -d , , , 3D-. , -d ( , ).

: -ms 3 . , .

: -oc 4 , . , .

: -ss 2 . , .

U-SURF ( ): -u . . , , , .

(SURF-128): -e , 3D- . , . OR.

: -in 4 / ( 4x4). , , 2, 16- , .

, .