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How to read fingerprints using any android touch screen phone?

A

anupdesai1248

Lurker
Hi:

I want to read finger prints by using android touch screen phone. So is this possible?


Can any body help me in that?

Thank You,
Anup Desai
 
This currently isn't possible. Or if it is, I really doubt it. Most touch screen phones use a capacitive touch. Which means, since our fingers conduct electricity, we disturb the electric fields infront of the phone's screen. While it does support multitouch, I really doubt it's so precise that it detects the ridges on our fingers.

You would need more of a heat sensitive touch screen. Which I don't think they use in most new generation touch screens.
 
there is one fingerprint scanner / screen lock app i tried once but it just locked the screen ;( had to uninstall it then
 
barqers said:
This currently isn't possible. Or if it is, I really doubt it. Most touch screen phones use a capacitive touch. Which means, since our fingers conduct electricity, we disturb the electric fields infront of the phone's screen. While it does support multitouch, I really doubt it's so precise that it detects the ridges on our fingers.

You would need more of a heat sensitive touch screen. Which I don't think they use in most new generation touch screens.
Click to expand...

wait thought wasnt there a fingerprint scanner on the very first tmobile G1 android phone? or am I dreaming that lol
 
deanshep85 said:
wait thought wasnt there a fingerprint scanner on the very first tmobile G1 android phone? or am I dreaming that lol
Click to expand...


The fingerprint scanners on phones right now aren't real scanners. you place your finger on the phone and release it after a certain # of scans. If you release at the right moment the phone will unlock, giving the illusion (to spectators) that it "scanned" your fingerprint.
 
Our screens work way differently than people think (well, people that think we can do a true fingerprint scan on your android device). Our screens only pick up the electrical charges in our fingertips. This is the reason that a powered stylus (designed for such screens) also works.
 
My IPAQ 5555 had a fingerprint scanner that I used to unlock the phone. Its certainly something that could be incorporated into these devices, but I doubt it could be part of the "current" style of screens.

Just FYI in case anyone wondered :-)
 
There are devices coming out that have fingerprint scanners in them. These are hardware components though. Current phones on the market don't have this capability.
 
lordofthereef said:
Our screens work way differently than people think (well, people that think we can do a true fingerprint scan on your android device). Our screens only pick up the electrical charges in our fingertips. This is the reason that a powered stylus (designed for such screens) also works.
Click to expand...

Yes, that's what I was saying too. That our fingers disrupt the electrical signals in the phones screen. That's why we don't have to push hard on the screen for it to acknowledge our input.

That being said, I doubt their as precise as the individual ridges on our fingerprints. Maybe one day the phone will have this capability, but currently I think most fingerprint readers use some form of laser ray, probably red, but blue could be a possibility for more accuracy.
 
As most everyone in here has said, it is simply not possible with the hardware that we have in our phones. Period. (unless you have a phone that has a dedicated fingerprint scanner on it, like you can find on some laptops)

But, my goal with this post was not to simply reiterate what others have already said. I simply wanted to say that technology is on the way! Example: Microsofts Second-generation Surface that was recently shown off at CES. The screen of the second-gen Surface has Infrared sensors that are built within each pixel of the screen, giving it the ability to do things like fingerprinting/scanning of documents. However, you wont be seeing this technology in phones anytime soon, as right now, the thinnest they are able to make a screen with that technology is 4-inches thick. Not exactly something you'd want to carry around in your pocket.
 
admile3 said:
As most everyone in here has said, it is simply not possible with the hardware that we have in our phones. Period. (unless you have a phone that has a dedicated fingerprint scanner on it, like you can find on some laptops)

But, my goal with this post was not to simply reiterate what others have already said. I simply wanted to say that technology is on the way! Example: Microsofts Second-generation Surface that was recently shown off at CES. The screen of the second-gen Surface has Infrared sensors that are built within each pixel of the screen, giving it the ability to do things like fingerprinting/scanning of documents. However, you wont be seeing this technology in phones anytime soon, as right now, the thinnest they are able to make a screen with that technology is 4-inches thick. Not exactly something you'd want to carry around in your pocket.
Click to expand...

the new motorola atrix has a lil scanner on the back of the phone for just the job of unlocking...
 
admile3 said:
As most everyone in here has said, it is simply not possible with the hardware that we have in our phones. Period. (unless you have a phone that has a dedicated fingerprint scanner on it, like you can find on some laptops)

But, my goal with this post was not to simply reiterate what others have already said. I simply wanted to say that technology is on the way! Example: Microsofts Second-generation Surface that was recently shown off at CES. The screen of the second-gen Surface has Infrared sensors that are built within each pixel of the screen, giving it the ability to do things like fingerprinting/scanning of documents. However, you wont be seeing this technology in phones anytime soon, as right now, the thinnest they are able to make a screen with that technology is 4-inches thick. Not exactly something you'd want to carry around in your pocket.
Click to expand...

That is really cool. I would love to have this built into my phone, minus the extra thickness. I would wonder how much extra battery consumption would occur because of the infrared sensors though?
 
admile3 said:
Which is exactly why I put "unless you have a phone that has a dedicated fingerprint scanner on it" in my original post...
Click to expand...

I know...I was just stating it because...well...its a pretty nice looking phone...

sorry I just watched the video on it again just before posting that..its quite an impressive looking piece of kit...I didn't mean to sound anything by that post lol :p

sorry...I'll go now lol
 
I have an HTC Desire Z (Also known as T-Mobile G2), and using an app called Fingerprint Screensaver, I'm able to unlock with a fingerprint scanner. I have no idea how it works, and before installing it I heavily doubted it could work, but it really does the job.

I gave it 3 sample scans of my thumb, and now when I press the power button to unlock the phone, it shows me a fingerprint scanner, which will scan my thumb print, and let me in. It will not unlock for any of my other fingers, or for anyone else's thumb.

And no, it doesn't work on how long you old it in or anything like that. You stick your thumb on it, and the green bar goes by twice, then it lets you in or not.

(Still very insecure, because I can just hold the home button to bring up the recent applications menu, and switch to my homescreen, but it's cool regardless)
 
Grundoko said:
I have an HTC Desire Z (Also known as T-Mobile G2), and using an app called Fingerprint Screensaver, I'm able to unlock with a fingerprint scanner. I have no idea how it works, and before installing it I heavily doubted it could work, but it really does the job.

I gave it 3 sample scans of my thumb, and now when I press the power button to unlock the phone, it shows me a fingerprint scanner, which will scan my thumb print, and let me in. It will not unlock for any of my other fingers, or for anyone else's thumb.

And no, it doesn't work on how long you old it in or anything like that. You stick your thumb on it, and the green bar goes by twice, then it lets you in or not.

(Still very insecure, because I can just hold the home button to bring up the recent applications menu, and switch to my homescreen, but it's cool regardless)
Click to expand...
Reading comprehension fail much? Even in the description for that app it says it is just for fun.
https://market.android.com/details?id=com.gau.screenguru.finger&feature=search_result
 
drdoom said:
Reading comprehension fail much? Even in the description for that app it says it is just for fun.
https://market.android.com/details?id=com.gau.screenguru.finger&feature=search_result
Click to expand...

I was ROFLMAO when I read this

lolcopter.gif
 
Grundoko said:
I have an HTC Desire Z (Also known as T-Mobile G2), and using an app called Fingerprint Screensaver, I'm able to unlock with a fingerprint scanner. I have no idea how it works, and before installing it I heavily doubted it could work, but it really does the job.

I gave it 3 sample scans of my thumb, and now when I press the power button to unlock the phone, it shows me a fingerprint scanner, which will scan my thumb print, and let me in. It will not unlock for any of my other fingers, or for anyone else's thumb.

And no, it doesn't work on how long you old it in or anything like that. You stick your thumb on it, and the green bar goes by twice, then it lets you in or not.

(Still very insecure, because I can just hold the home button to bring up the recent applications menu, and switch to my homescreen, but it's cool regardless)
Click to expand...

+1 for that...just....that is win :D
 
I didn't say it actually scanned my fingerprint. It's quite obvious the images displayed are fake, but it does do something. I don't know if it just gets how hard you're pressing or what, but if I use any of my other fingers it will always fail.

I'm not sure how it was a reading comprehension fail, I knew the images were not from my actual thumb, but regardless of how well it works, it does something.
 
Grundoko said:
I didn't say it actually scanned my fingerprint. It's quite obvious the images displayed are fake, but it does do something. I don't know if it just gets how hard you're pressing or what, but if I use any of my other fingers it will always fail.

I'm not sure how it was a reading comprehension fail, I knew the images were not from my actual thumb, but regardless of how well it works, it does something.
Click to expand...

im gonna download it just for the basis of proving how this 'joke' app works

EDIT: After having a 2 minute stupid play with it...its obviously not scanning (like you REALLY needed to be told that lol) and its not working on how many fingers or pressure etc....

its a simple "place your finger dead centre of the box" its location aware on the screen....much like using the sliders on vanilla android or the sense unlock on HTC or similar style unlocks....try anywhere else on the screen an it fails to work....try just your finger tip and it mostly fails....

bit of silly fun really....well...uninstall that and back on with widgetlocker :D
 
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