Is that possible to make an app that control the laser sensor in the LG g4 and make it read fingerprint and because the laser is used to measure distances so it may also measure the distance in our finger
Abdelrahman tarek said:
Is that possible to make an app that control the laser sensor in the LG g4 and make it read fingerprint and because the laser is used to measure distances so it may also measure the distance in our finger
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nope because we don't have the api of the laser.
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I don't know if anyone knows of a way, or not as the case may be, to access the laser autofocus sensor for use in developing an app.
I'm personally assuming that the sensor records distance data in order to change the focus of the camera. I want to be able to access that distance data for use in a Range Finder app. Any help in this would be greatly appreciated! And if this isn't in the right forum, do let me know
+1
Sent from my VS985 4G using XDA Premium 4 mobile app
+1
Would love to see this!
contraryrhombus said:
I don't know if anyone knows of a way, or not as the case may be, to access the laser autofocus sensor for use in developing an app.
I'm personally assuming that the sensor records distance data in order to change the focus of the camera. I want to be able to access that distance data for use in a Range Finder app. Any help in this would be greatly appreciated! And if this isn't in the right forum, do let me know
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+1
PS: I tried the autofocus laser...
and i find it really strange...
The first time i tried it without covering the laser sensor, and i got a fast and precise focus.
Then the second time i tried to cover (with a finger) the autofocus sensor and i still got a fast and precise focus...
(the test was done on a low light ambient)
Can someone explain this?
Sent from from my LG-D855
EpicChineseTime said:
+1
PS: I tried the autofocus laser...
and i find it really strange...
The first time i tried it without covering the laser sensor, and i got a fast and precise focus.
Then the second time i tried to cover (with a finger) the autofocus sensor and i still got a fast and precise focus...
(the test was done on a low light ambient)
Can someone explain this?
Sent from from my LG-D855
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The camera falls back on software in situations where the laser can't get an accurate reading similar to how the S5 and all other phones focus normally. It's possible that our wasn't using the laser for this reason when you tested it even though its on.
Sent from my LG-D850 using XDA Premium 4 mobile app
Question I think this would be possible but it's above my skills and that is to turn the laser auto focus from the camera into a laser range finder lg say the laser measures the distance to focus so I don't see how it can't be used as a laser range finder maybe there's an app out there that does it but I couldn't find one I think it would be a cool add on app for the g3
I know there are a lot of range finder apps it there but I think using the g3s laser would make the app much more accurate
Robshr said:
Question I think this would be possible but it's above my skills and that is to turn the laser auto focus from the camera into a laser range finder lg say the laser measures the distance to focus so I don't see how it can't be used as a laser range finder maybe there's an app out there that does it but I couldn't find one I think it would be a cool add on app for the g3
I know there are a lot of range finder apps it there but I think using the g3s laser would make the app much more accurate
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It's only effective up to a certain short distance unlike the commercial range finders. Its possible but I think it only works for fairly close objects.
I was applying my tempered glass screen protector and after everything was done, I did a thorough check to realize that my laser sensor has hairline scratches. Will it affect the focus or performance? It's my first LG phone..
Thank you in advance!
My laser appears to have a few tiny scratches as well.
Highly doubt it will hurt anything. My g3 laser was scratched up and it seemed fine.
I was thinking of polishing the plastic and applying a film protector to get it protected. Any idea if a film would affect the focus? Thank you for the reply.
Sent from my LG-H815 using XDA Free mobile app
Anyone got preventive measures to prevent laser focus plastic cover from getting scratches further? Mine is quite scratched up and I'm pretty annoyed by it. I believe it won't affect the focusing speed but it's a flagship phone from LG and yet such thing happens..
Sent from my LG-H815 using XDA Free mobile app
The laser cover is soft, cheap plastic. Nothing you can do about it. No, it won't affect the focusing unless you put a giant gash in it that will deflect the beam. Same thing was happening on the G3. Just be careful about it.
---------- Post added at 14:02 ---------- Previous post was at 14:02 ----------
brysonwong said:
Anyone got preventive measures to prevent laser focus plastic cover from getting scratches further? Mine is quite scratched up and I'm pretty annoyed by it. I believe it won't affect the focusing speed but it's a flagship phone from LG and yet such thing happens..
Sent from my LG-H815 using XDA Free mobile app
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Polish it with ABS polishing compound, then put a drop of optical hard lacuqer on it. More trouble than it's worth, IMHO.
Although LG brands it as "laser" it's nothing more than a ray of infrared shot and measured after it bounces off obstacles. So unless the emitter/receptor is REALLY weak, there will be likely no effect on the focus.
Double that with the fact that the camera uses both the "laser" and phase detection to focus, if the "laser" fails to provide focus information the phase detection will do (slower).
Think of it that way: Do you care that much about the scratches on your TV's remote infrared emitter?
Don't worry, your "laser" is fine
AnteusFogg said:
Although LG brands it as "laser" it's nothing more than a ray of infrared shot and measured after it bounces off obstacles. So unless the emitter/receptor is REALLY weak, there will be likely no effect on the focus.
Double that with the fact that the camera uses both the "laser" and phase detection to focus, if the "laser" fails to provide focus information the phase detection will do (slower).
Think of it that way: Do you care that much about the scratches on your TV's remote infrared emitter?
Don't worry, your "laser" is fine
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I don't think you really know what a laser actually is.
The whole point of the laser-assisted autofocus is to project a tightly focused, coherent beam of light shining in a single direction so that it reflects off the photo subject and nothing else. A non-laser IR diode projects light in a "cone" in all directions, which is useless for focusing the camera. It is a laser by all means, otherwise it would not work at all.
Scratching the cover might diffuse the beam slightly but only a major gash will actually impair it to the point of uselessness (since it will scatter the light in many directions).
Here's a more thorough explanation: http://www.androidauthority.com/lg-g3-laser-auto-focus-386896/
siraltus said:
I don't think you really know what a laser actually is.
The whole point of the laser-assisted autofocus is to project a tightly focused, coherent beam of light shining in a single direction so that it reflects off the photo subject and nothing else. A non-laser IR diode projects light in a "cone" in all directions, which is useless for focusing the camera. It is a laser by all means, otherwise it would not work at all.
Scratching the cover might diffuse the beam slightly but only a major gash will actually impair it to the point of uselessness (since it will scatter the light in many directions).
Here's a more thorough explanation: http://www.androidauthority.com/lg-g3-laser-auto-focus-386896/
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I know very well what a laser is, thank you very much
http://www.anandtech.com/show/8062/a-closer-look-at-the-g3s-ir-laser-auto-focus-system
A "perfect" laser would be actually counter-productive, for unless you have a sort of "crosshair" on your viewfinder to mark the focusing point, you may very well have your phone focus on the tree behind your beautiful significant other, just because your subject is not in the laser's line of sight.
It is actually necessary for this concept to work that the beam is conic. Here, see this image from LG's own keynote: http://androidspin.com/wp-content/uploads/2014/05/LG-G3-Laser-Autofocus.png
If it was a super-focus laser, would they represent it as a conic, albeit very narrow, beam?
They don't need a "perfect" laser emitter to work out their concept. Granted, they need a narrow beam to avoid interference and allow an accurate measure of the scene being captured but a perfect laser beam (perfectly coherent, single direction light) would just do more harm than good. This is not used for sniper rifle or whatever, it's used for focusing on a scene.
Scratches will maybe deviate a portion of the beam a little but the majority of it, unless the window is completely buffed, will still serve its purpose. I'm strongly guessing that the way it works is: Send a burst, receive reflectionS (plural because there will be more than one) and apply some algorithm that'll define the most appropriate distance to focus on, based on the collection of durations from the receiver.
So I have a question on this topic. Since its supposed to be infrared, on a remote, you cant see anything being emitted unless you look at the emitters through a camera or something. When I have my camera on my G4 on, I can see a tiny red red light shining. Can anyone else actually see the red light being emitted? Just making sure mine's not defective.
rustypie said:
So I have a question on this topic. Since its supposed to be infrared, on a remote, you cant see anything being emitted unless you look at the emitters through a camera or something. When I have my camera on my G4 on, I can see a tiny red red light shining. Can anyone else actually see the red light being emitted? Just making sure mine's not defective.
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I can see it too. Very much like you can see the IR emitter of your TV remote, except it's more focused here so even more noticable. Your device's fine
More on why we can "see" infrared in certain conditions even though it's out of the visible spectrum: http://phys.org/news/2014-12-human-eye-invisible-infrared.html
You'll notice that the "laser" is pulsing rapidly, which is the required condition to trick the eye into "seeing" the beam.
HEY Guys ! Im wonder if it is posible to make an app which cam use OIS sensor as a thermal vision ? how do you think ? isnt it good ?
I think you don't really know what OIS really means...
OIS is Optical Image Stabilization, the sensor just moves opposite to your movement to stabilize the picture, that's it.
For thermal vision, you need a thermal sensor, which is not available... end of story.
davebugyi said:
For thermal vision, you need a thermal sensor, which is not available... end of story.
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But you never know what extra features there will be in smartphones in the near future. I'm hoping for a helipad. [emoji12]
[Written by my thumbs on a state-of-the-art Nokia 3110.]
(Check The Video What is that Laser Light Actived On your LG G7 Frontal Glass)
Hello everybody!
I am a person who all the time is looking for how to be more efficient with the battery of your phone I really like to disable GPS and disable the most things you can do and I just bought this LG G7 ThinkYou and I just realize that there is a laser invisible light powered on all the time on your frontal glass of your LGg7 check the video please:
note: THIS LASER LIGHT IS ONLY NOTICIABLE WHEN YOU SEE IT THROUGHT A CAMERA
VIDEO (YOUTUBE): watch?v=HAWa7vrp0Bk
And as you know I am caring if would that consume my battery and how to disable it (1), would that damage my eye vision (2), maybe it will finish life time soon because its all time on (3), what is that used for (4) my others mobiles don't have that (Galaxy Nexus, Sony Z5).
Sandro
sandronejm said:
(Check The Video What is that Laser Light Actived On your LG G7 Frontal Glass)
Hello everybody!
I am a person who all the time is looking for how to be more efficient with the battery of your phone I really like to disable GPS and disable the most things you can do and I just bought this LG G7 ThinkYou and I just realize that there is a laser invisible light powered on all the time on your frontal glass of your LGg7 check the video please:
note: THIS LASER LIGHT IS ONLY NOTICIABLE WHEN YOU SEE IT THROUGHT A CAMERA
VIDEO (YOUTUBE): watch?v=HAWa7vrp0Bk
And as you know I am caring if would that consume my battery and how to disable it (1), would that damage my eye vision (2), maybe it will finish life time soon because its all time on (3), what is that used for (4) my others mobiles don't have that (Galaxy Nexus, Sony Z5).
Sandro
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That should be the proximity sensor that checks if the phone is in a pocket so I can't disable the screen off gestures.
Yes, it's a proximity sensor, and it's important against unwanted control and activation of the display during calls or if is in pocket. It's an IR LED that detect the distance to +-5cm. Battery consumption is basically zero. About 10mA thanks to IR. And lifetime is hundreds thousand hours.
On a similar principle works TV control remote (you can see light with camera too if you press button) so it's safe to live.
https://www.youtube.com/watch?v=RO1P8jGYU78 more info about proximity.
Oh, I see. When it is in my pocket it should keep unlocked right? Currently I did disable this resource and it keeps flashing for what kind of proximity reason?
Hey I think its about the frontal camera maybe?
Yeah it is similar to the remote control of my TV launching laser when I press a button.
I notice when the back camera is recording also there is a laser light on the back glass.
No, its should be locked. Simple test: cover sensor with finger and do knock knock wake up. Display must stay off.
Laser on Back side Is focus for camera.