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maemo.org - Talk (https://talk.maemo.org/index.php)
-   Nokia N900 (https://talk.maemo.org/forumdisplay.php?f=44)
-   -   Use camera for control rather than touch screen. (https://talk.maemo.org/showthread.php?t=41966)

abbra 2010-01-24 06:09
Re: Use camera for control rather than touch screen.
 
Resolution of frontend camera is 640x480 (VGA), this is not much different from many of USB cameras. Most of face recognition/face tracking algorithms work on QVGA/VGA frame size to be fast and successful. That is if you could get noise level down to a reasonal degree.

However, camera consumes energy while it operates. Running it for long time is substantial power drain. Same goes for many other sensors like proximity, accelerometer and touch screen itself. Screen and touch screen consume majority of energy in N900 when they are active, btw.

herix1 2010-01-24 06:25
Re: Use camera for control rather than touch screen.
 
Just curios, what kind of knowledge is required to progrram this kind of app? I have never programmed any app that interact with a camera let alone recognize image patterns. So i'd like to know where to look. I might work on this app :P

somekeystrokes 2010-01-24 07:04
Re: Use camera for control rather than touch screen.
 
Quote:
Originally Posted by lynxus (Post 490911)
Hi Guys,

Being linux n all and considering our N900's have a front facing camera.

What do you think about the chances would be of a cool feature where the camera was on and to move desktops etc you could use hand gestures?

IE: wave your hand from right to left and the screen would slide right to left?

Just wondered if it would be possible or if anyone has seen talk about this before?

That would really PISS off the apple monkeys saying that their touchscreen is better.

We could turn round and say, well.. we dotn even need to touch ours!

/Giggity
yes.!
i hv seen this. I had n95 8gb bfre n900....and thre was an app which does exactly the same. It workd with gallery, music player, and every other menu.!
i just had to wave my hand frm right to left fr the next image, or from top to bottom for the next track..!

Catacylsm 2010-01-24 11:01
Re: Use camera for control rather than touch screen.
 
Quote:
Originally Posted by DarkPand0r (Post 491236)
The res on the camera can barely recognise a human head let alone the lines on a finger.......

Correct about the poor resolution making any useful application worthless.......Most of the other applications that could be used are covered by the proximity sensor.

But still, would be a cool application to have and if set up it Could be of some use maybe in later applications.
Hmm thats a shame, what about putting a big black dot on your thumb?

(Im also quite serious about this..lol).

I'd imagine the camera quality would be mainly effected by lighting if its very low res?

Helmuth 2010-01-24 11:25
Re: Use camera for control rather than touch screen.
 
Hmm... mostly useless... okay... except, we could use it for fast scrolling in the webbrowser. (up and down)

Activate the "Sensor" with press and hold the camera button (only focus) and swipe over the camera up or down with your finger. It should be very easy to recognise such a gestue. :)

AlexDT 2010-01-24 11:35
Re: Use camera for control rather than touch screen.
 
Will it be possible to ever replace the front camera?

Catacylsm 2010-01-24 19:42
Re: Use camera for control rather than touch screen.
 
Quote:
Originally Posted by Helmuth (Post 491691)
Hmm... mostly useless... okay... except, we could use it for fast scrolling in the webbrowser. (up and down)

Activate the "Sensor" with press and hold the camera button (only focus) and swipe over the camera up or down with your finger. It should be very easy to recognise such a gestue. :)
Now thats an idea i would actually like to see happen :).
Although having the camera on for rediculously long periods of time would be silly, we'd have to fix it to apps.

It'd work with left or right most likely too (If browser pages are outside of the screen etc.) even on strategy games it may be worth it (As ports progress that is :) ).

I would definately make apps if i knew how but at the moment im a linux virgin until i get the device! Then i will study thoughrilly the guides! :D.

nilchak 2010-01-25 03:49
Re: Use camera for control rather than touch screen.
 
I had seen the video - where a hand gesture in fromt of the front-facing camera can stop the music player or start it, open a new task or close a task etc - all with hand gestures.

I think you are talking about this implementation
http://www.symbian-addict.com/2008/0...with-hand.html

Ps: The video seems to have been removed.


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