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FingerIO: Using Active Sonar for Fine-Grained Finger Tracking

fingerio.cs.washington.edu

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Re: FingerIO: Using Active Sonar for Fine-Grained Finger Tracking

#71

Post by fudged71 »

jgrahamc wrote: post #70
magic_man wrote: post #14

I work with sonar and the physical positioning of the sensors is important in trying to get useful results. Why is it these academic types don't release the apks or software? Just publications and maybe a video.

Did you ask? Many years ago I decided to reproduce an algorithm used to detect copy/paste image modification. http://blog.jgc.org/2008/02/tonight-im-going-to-write-myself... The researcher was happy to provide me with their test images to verify that my implementation worked. Try asking.

Have you considered providing this tool as a service? It would be great to easily detect forgeries without CLI experience.

Re: FingerIO: Using Active Sonar for Fine-Grained Finger Tracking

#75

Post by tobr »

foobarqux wrote: post #67
Mithaldu wrote: post #63

Earlier quoted context omitted.

This is correct. The movements match up just fine, but the reaction time there is something above 2 seconds.

They need to buffer to get a Fourier transform and to do the autocorrelation.

They say they use an "inaudible high frequency soundwave", so that should be > 20kHz. Shouldn't a buffer of a few milliseconds be more than enough then?

Re: FingerIO: Using Active Sonar for Fine-Grained Finger Tracking

#76

Post by hga »

k_bx wrote: post #38

We need to immediately improve on PIN-code protection upon cash-withdrawal in ATMs. The problem has been there for a while, but man, it gets easier and easier.

Or be (not, it would seem) overly paranoid like me, my PIN patterns and entering do not involve moving my fingers horizontally, I put my hand down on the pad with my fingers on set keys, cover it with my wallet, and type it in. I also always double one key to make it that much harder to get by observation, a trick I learned from a sysadmin with major access to my school's systems back when we all had to use public terminals a lot.

Re: FingerIO: Using Active Sonar for Fine-Grained Finger Tracking

#77

Post by saulrh »

magic_man wrote: post #14

I work with sonar and the physical positioning of the sensors is important in trying to get useful results. Why is it these academic types don't release the apks or software? Just publications and maybe a video.

Having been in this kind of situation before: because the software isn't ready for any kind of release. They probably spent a week gathering and tuning the parameters on the DSP for each individual phone they ran it on, and without their knowledge of the system it'd take you a month and a half to get it working on your phone.
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