hi,
i need document of heartbeat in android
What exactly do you mean by heartbeat in android?
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boggartfly said:
What exactly do you mean by heartbeat in android?
Sent from my Nexus 4 using XDA Premium 4 mobile app
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heartbeat app in android like this app
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nadine01 said:
heartbeat app in android like this app
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What you are looking out for is a Photoplethysmograph.
It's the term for what your phone is acting as.
Basically, your blood vessels rhythmically dilate and contract with every heart beat. This is measurable as either a change in reflectance or transmittance (depending on how the photoplethysmograph is configured. In the case of your phone, it's measuring reflectance, as the light is adjacent to the camera.
In medical instruments, it's generally done with infrared light, because blood absorbs shortwave infrared more then red or white light, and your tissue is more transparent to infrared. However, there is no reason it wouldn't work with a phone camera.
If done properly, it should as or more accurate then manual measurement. However, a phone is not a proper photoplethysmograph, so the realistic achievable accuracy is likely dependent on a number of factors, including camera performance, proximity of the illuminating LED to the camera lens, and the algorithm used to extract the pulse from the video return.
However, you need to be aware that all photoplethysmographs are very sensitive to mechanical movement. It is essential that you hold your finger as still as possible, and avoid moving the phone relative to the finger.
But for all speculations it's mostly a scam cause mobile devices ain't that good yet....
Related
Does anyone know if the lumen sensor on the Diamond is accurate enough to make a good light meter application for use in photography?
I would assume no, but I certantly dont know for sure.
found this one it wil be possible http://www.clickapps.com/moreinfo.htm?pid=18788§ion=
imperitus said:
Does anyone know if the lumen sensor on the Diamond is accurate enough to make a good light meter application for use in Try this one
Waterlevel
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it has light meter build in
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I'll have a play and see - I've got WaterLevel installed which gives an indication of brightness on the sensor, and I've got a Sekonic lightmeter which i can use to compare the two.
I suspect that the TD's meter is nowhere near accurate enough over the whole spectrum...
Let us know the results, would be interesting.
The water level light meter is what inspired me to ask. It seems fairly consistent, but have no real way to see if it's accurate.
If it is a light meter application that also included stuff like DOF calculators etc... would be slick.
I bought the one that WvanWaas had linked. It workes great on my Onmia i910 thanks guys
Light Meter Accuracy for Diamond
There is an app - Water Level - that I use that is reasonably accurate at measuring lumens, but very directional using the small front camera - but it works well enough for OHSE evaluations. Whether its good enough for photographic use I don't know - and then you still have to develop the translation from lumens to ISO's f-stops etc
I am writing one.
The app is called Light Meter, Vesion 1.01a is currently available on the market.
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Word on the street has it that T-Mobile’s branding has been seen on the SGH-T699 somewhere in the wild, where some have speculated that this is actually a T-Mobile variant of the Samsung Galaxy Nexus. Of course, this sort of speculation not too healthy at all, since what you see above reveals something very important – since the SGH-T699 comes with a slide-out QWERTY keyboard from the side, which is something the Galaxy Nexus does not have. It is further discovered that the SGH-T699 will come with a 5-megapixel camera at the back, in addition to a front-facing camera for all of your video call needs, in addition to an LED notification light that ought to come in handy, letting you know whether there is an incoming text message or email waiting for you to attend to it.
Apart from that, a User Agent Profile which was discovered just last month pointed out to a Qualcomm Snapdragon S3 or S4 processor underneath the hood, with a display resolution of 720 x 1280 pixels. No idea on the kind of tactile feedback that the QWERTY keyboard offers, but it does seem to shape up nicely from initial leaked shots.
T-Mobile-branded SGH-T699 spotted in the wild?
It's not a nexus
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masaidjet said:
It's not a nexus
Sent from my SPH-D700 using XDA Premium App
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Oh? Then what is it?
Hey can we keep all these new phone discussions in the new phone discussion thread?
Thanks
FNM
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Your Note as you've never seen it...
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You can see the S-pen ont he right with its spring, the wacom digitizer, antennas on the top corners, etc.
compare with the pictures in this page: http://galaxynote2root.com/galaxy-note-2-repair/how-to-disassembleassemble-galaxy-note-2-for-screen-repair/
Too many voids in the solderings on the left, but the BGAs look fine.
Cool
dproldan said:
Your Note as you've never seen it...
You can see the S-pen ont he right with its spring, the wacom digitizer, antennas on the top corners, etc.
compare with the pictures in this page: http://galaxynote2root.com/galaxy-note-2-repair/how-to-disassembleassemble-galaxy-note-2-for-screen-repair/
Too many voids in the solderings on the left, but the BGAs look fine.
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Gives me all sorts of geek tingles..
This should be deleted and you should be banned. This porn is filthy! I like...
Part of me feels like I should be paying you money for this...
Good thing my wife isn't looking...
So is All that little thing what costs all that big amount of money. Mmmm
Sent from my GT-I9100 using xda premium
I believe that is "The Sex"
i always wished, with a phone of our size, that they could put an equally ridiculously large phone antenna.
pretty cool. my first thinking of the title actually was the x-ray photo token by N2 .......
Quite impressive to see how little technology there is in there considering how much this device can do. That's some serious engineering done by Samsung. Too bad they are not advertising this just like their worst competitor is doing when they have obviously done such an great job.
/ Magnus
This is an ultimative strip-tease
- Barney Stinson on XRay
This is what i call..Beauty & the Beast!!
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COOL
It's really cool !!!
There is an LED at the bottom of the phone, but there is a dearth of photos showing how bright it is or whether it can emit various colors. Any other comments out there?
Wow if there was led notifications it would be the perfect phone.
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I'm really interested about this feature ! If anyone have an information tell us!
Pretty sure it's a similar RBG LED as the Galaxy Nexus, you can see it's at the bottom of the phone below the screen. At the vert least we know it's there as the manual says it is!
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Take it for what it's worth.
I think the GNex set the standard on this one, the ED will be a part of the bottom bezel.
http://www.engadget.com/2012/10/29/google-nexus-4-hands-on/
2nd paragraph neat the bottom they state its RGB but I will look more.
CJHolderUK said:
I think the GNex set the standard on this one, the ED will be a part of the bottom bezel.
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I don't understand either clause above. Can you explain? Thanks...
I also read somewhere that it is indeed RGB. Thank god we have LightFlow
EddyOS said:
Pretty sure it's a similar RBG LED as the Galaxy Nexus, you can see it's at the bottom of the phone below the screen. At the vert least we know it's there as the manual says it is!
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Bummer. I wish more people would center the FFC. Or at least angle the camera so you don't have to offset the phone while video chatting or taking pictures. The FFC on the Nexus 4 is all the way on the right.
Just wanted to say I'm really impressed with control of brightness in different environments. I had numerous amounts of devices and this one is the most instantaneous to change and accurately fix it to wether inside or outside. LG nailed it there for me. ?
witeboy07 said:
Just wanted to say I'm really impressed with control of brightness in different environments. I had numerous amounts of devices and this one is the most instantaneous to change and accurately fix it to wether inside or outside. LG nailed it there for me. ?
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I hope that's true, the phone I've been using the past 2 and a half years has worthless autobrightness. I always manually adjust it.
witeboy07 said:
Just wanted to say I'm really impressed with control of brightness in different environments. I had numerous amounts of devices and this one is the most instantaneous to change and accurately fix it to wether inside or outside. LG nailed it there for me. ?
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+1, it is quite impressive. On a screen related note, interestingly the G3 screen is viewable while using polarized sunglasses to view it where my One M8 isn't. Also, for those wondering about it, in my opinion this screen is EASILY viewable in sunny environments. I'm very impressed with how bright it cranks. [emoji106]
Use this thread here - http://forum.xda-developers.com/showthread.php?t=2782251
Closed
Thanks