Took this picture of our cooking hob and noticed something weird but cool. The ring in real life is red, but in photo is bluey-purple.
Sent from my Nexus 4 using xda app-developers app
stefandunn said:
Took this picture of our cooking hob and noticed something weird but cool. The ring in real life is red, but in photo is bluey-purple.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
Does your hob get hot? If so the camera is most probably imaging the infra red radiation from the heat. Point the camera at a remote control LED while pressing a button and look at your phone's screen.
Yeah I got a light with my camera from my optical gaming mouse, but it isn't visible to the eye! Very cool (sort of)
Sent from my Nexus 4 using Tapatalk 2
What you're seeing is near-Infra-Red (nIR) radiation. CCD and CMOS image sensors are sensitive to a much wider range of EM wavelengths than the visible spectrum. Due to the size and cost of compact sensors, filters to remove these unwanted wavelengths are not perfect. The Bayer Pattern (RGBG) colour filters on the sensor itself have different band passes; ranges of wavelengths in which they will allow light to pass. The red filter will allow a small amount of nIR to pass, as red is the closest in wavelength to nIR. The green filter blocks IR fairly effectively. The blue filter's transmission spectrum blocks red and green effectively, but is fairly transparent to nIR.
That is why nIR appears purple on CCD and CMOS camera.
Related
read in night, not dazzling
Do you mean LCD?
Maybe he does mean led. The perfect blacks on amoled are excellent for reading white text in black environment. I've wanted to punch the lcd backlight many times over.
LED or LCD, turn the brightness down, no dazzling, can read at night. I don't see the
I like Doritos.
Change thread title to "how to get a locked thread"
Sent from my Nexus 7 using Tapatalk 2
Umm...what is this?
Sent from my Samsung Galaxy S2 using Tapatalk 2
raazman said:
Umm...what is this?
Sent from my Samsung Galaxy S2 using Tapatalk 2
Click to expand...
Click to collapse
That's what she said?
Slap-Yourself :) said:
raazman said:
Umm...what is this?
Sent from my Samsung Galaxy S2 using Tapatalk 2
Click to expand...
Click to collapse
That's what she said?
Click to expand...
Click to collapse
Ouch... just, ouch.
hihi
Efficiency: LEDs emit more light per watt than incandescent light bulbs.[99] Their efficiency is not affected by shape and size, unlike fluorescent light bulbs or tubes.
Color: LEDs can emit light of an intended color without using any color filters as traditional lighting methods need. This is more efficient and can lower initial costs.
Size: LEDs can be very small (smaller than 2 mm2[100]) and are easily attached to printed circuit boards.
On/Off time: LEDs light up very quickly. A typical red indicator LED will achieve full brightness in under a microsecond.[101] LEDs used in communications devices can have even faster response times.
Cycling: LEDs are ideal for uses subject to frequent on-off cycling, unlike fluorescent lamps that fail faster when cycled often, or HID lamps that require a long time before restarting.
Dimming: LEDs can very easily be dimmed either by pulse-width modulation or lowering the forward current.[102]
Cool light: In contrast to most light sources, LEDs radiate very little heat in the form of IR that can cause damage to sensitive objects or fabrics. Wasted energy is dispersed as heat through the base of the LED.
Slow failure: LEDs mostly fail by dimming over time, rather than the abrupt failure of incandescent bulbs.[103]
Lifetime: LEDs can have a relatively long useful life. One report estimates 35,000 to 50,000 hours of useful life, though time to complete failure may be longer.[104] Fluorescent tubes typically are rated at about 10,000 to 15,000 hours, depending partly on the conditions of use, and incandescent light bulbs at 1,000 to 2,000 hours. Several DOE demonstrations have shown that reduced maintenance costs from this extended lifetime, rather than energy savings, is the primary factor in determining the payback period for an LED product.[105]
Shock resistance: LEDs, being solid-state components, are difficult to damage with external shock, unlike fluorescent and incandescent bulbs, which are fragile.
Focus: The solid package of the LED can be designed to focus its light. Incandescent and fluorescent sources often require an external reflector to collect light and direct it in a usable manner. For larger LED packages total internal reflection (TIR) lenses are often used to the same effect. However, when large quantities of light is needed many light sources are usually deployed, which are difficult to focus or collimate towards the same target.
- Advantages of LED lighting
LED's talk about LCD now.......
Sent from my GT-I9450
InvalidUsername said:
- Advantages of LED lighting
Click to expand...
Click to collapse
While interesting, I don't think it is applicable, those are all talking lighting, not displays.
...wait a tic, are you just being a smartass... :silly:
There aren't LED screens, it is a marketing gimmick.
I wouldn't want a LED screen on a phone. You have to hold that against your face all the time, you might get LED poisoning.
This forums seems to attract the worst threads.
In before lock!
So I might be getting another replacement One, and I'm wondering if the new Omnivision modules that they've started using are any good.. I was reading the specs on the website (model: OV4688) and it seems that it doesn't offer OIS, it says Electronic Image Stabilization on their website. Also, I read somewhere that they're very poor in low light.. Anyone got proof to back these up? Any pictures to show the differences between these? Also, any difference in the mic audio quality between the old and new batches?
Sent from my HTC One using Tapatalk
BumP!!
Sent from my iPod touch using Tapatalk
n1234d said:
BumP!!
Sent from my iPod touch using Tapatalk
Click to expand...
Click to collapse
So I wrote about this in one of the purple camera fix threads. First I'll see I haven't noticed any puple/pink hues in any pics in lowlight. It seems to be performing well in that area. I also don't have a pink spot in the middle.
Occasionally in the outer edges I might notice some green tint in low light - particularly in rooms that have a shade of green in them already. It doesn't however grow and get worse. Its just the outer fringes. When I switch the camera from wide to regular crop it pretty much goes away. If not, its easily fixed with a quick touchup by adjusting the saturation with a custom effect in the gallery or just using aviary and the one click color fix. Also you can avoid it all together by adjusting saturation down a notch in the camera settings before taking a pic.
However.....what I have noticed is that in indoor lighting, even good lighting, the video recording frames per second maxes out at like 19-20. This is kind of a bummer. I mean I've turned on a all the lights in a really well lit room and could not achieve what I could in fps compared to the old sensor. I've tried different camera apps and they all max out at 19-20 in these light conditions, which tells me that its most likely set in the kernel. I wonder if this sensor has not been optimized fully by HTC yet. I think they've worked with three different sensors so far: ST electronics, Sharp, and Omnivision. Perhaps its hard to accomidate them all in the kernel - but I'm just speculating. there.
My compromise is to shoot indoor video at the 60fps mode, because that caps out indoors at 40fps.
I've fully tested video outdoors and even this morning indoors when there was no artificial light source and it recorded at a full 30 fps.
If what I think is true - that its not fully optimized at the kernel level it could be something HTC can push out in an update. Perhaps its hard for them to try to support 3 different sensors and find a balance...But this is just speculation on my part. Now I've lived in the same house and conditions for the past year and the old sensor had an edge up on fps than the Omni. I looked at some old videos shot indoors last night and fps was hovering around 29-30. So far this is my only gripe.
A note about the Sensor:
Early on Brian at AnandTech when he reviewed the One talked a bit about the Sensor HTC used when building the first Ones, and he also compared the ST sensor to the Omnivision sensor, because that Omni made its debut at the 2013 CES. Here is his review:
http://www.anandtech.com/show/6747/htc-one-review/5
I find it interesting that 2 companies made identical sensors, ST and Omnivision according to Brian.
Overall I'm happy I sent my device in and had the sensor replaced, because in the end, no amount of quick photo tools or photoshop would help the purple tint issue.
Hope this helps.
gustav30 said:
So I wrote about this in one of the purple camera fix threads. First I'll see I haven't noticed any puple/pink hues in any pics in lowlight. It seems to be performing well in that area. I also don't have a pink spot in the middle.
Occasionally in the outer edges I might notice some green tint in low light - particularly in rooms that have a shade of green in them already. It doesn't however grow and get worse. Its just the outer fringes. When I switch the camera from wide to regular crop it pretty much goes away. If not, its easily fixed with a quick touchup by adjusting the saturation with a custom effect in the gallery or just using aviary and the one click color fix. Also you can avoid it all together by adjusting saturation down a notch in the camera settings before taking a pic.
However.....what I have noticed is that in indoor lighting, even good lighting, the video recording frames per second maxes out at like 19-20. This is kind of a bummer. I mean I've turned on a all the lights in a really well lit room and could not achieve what I could in fps compared to the old sensor. I've tried different camera apps and they all max out at 19-20 in these light conditions, which tells me that its most likely set in the kernel. I wonder if this sensor has not been optimized fully by HTC yet. I think they've worked with three different sensors so far: ST electronics, Sharp, and Omnivision. Perhaps its hard to accomidate them all in the kernel - but I'm just speculating. there.
My compromise is to shoot indoor video at the 60fps mode, because that caps out indoors at 40fps.
I've fully tested video outdoors and even this morning indoors when there was no artificial light source and it recorded at a full 30 fps.
If what I think is true - that its not fully optimized at the kernel level it could be something HTC can push out in an update. Perhaps its hard for them to try to support 3 different sensors and find a balance...But this is just speculation on my part. Now I've lived in the same house and conditions for the past year and the old sensor had an edge up on fps than the Omni. I looked at some old videos shot indoors last night and fps was hovering around 29-30. So far this is my only gripe.
A note about the Sensor:
Early on Brian at AnandTech when he reviewed the One talked a bit about the Sensor HTC used when building the first Ones, and he also compared the ST sensor to the Omnivision sensor, because that Omni made its debut at the 2013 CES. Here is his review:
http://www.anandtech.com/show/6747/htc-one-review/5
I find it interesting that 2 companies made identical sensors, ST and Omnivision according to Brian.
Overall I'm happy I sent my device in and had the sensor replaced, because in the end, no amount of quick photo tools or photoshop would help the purple tint issue.
Hope this helps.
Click to expand...
Click to collapse
Thanks for the info!
Is it just me or the bottom ir sensors actually glow a little red in the dark?
Sent from my XT1095 using XDA Free mobile app
pulley06 said:
Is it just me or the bottom ir sensors actually glow a little red in the dark?
Sent from my XT1095 using XDA Free mobile app
Click to expand...
Click to collapse
Not just you, I can see mine too. They aren't sensors, there is only one sensor and it's on the top left. The other three (there's actually another one to the right of the ear piece) are emitters and their sole purpose is to emit IR for the sensor to pick up. So that's what you are seeing, the emitters lighting up. Was just talking about this in another thread- http://forum.xda-developers.com/moto-x-2014/help/ir-sensors-t2963401
_MetalHead_ said:
Not just you, I can see mine too. They aren't sensors, there is only one sensor and it's on the top left. The other three (there's actually another one to the right of the ear piece) are emitters and their sole purpose is to emit IR for the sensor to pick up. So that's what you are seeing, the emitters lighting up. Was just talking about this in another thread- http://forum.xda-developers.com/moto-x-2014/help/ir-sensors-t2963401
Click to expand...
Click to collapse
Alright. I was just a tad bit worried
They look like 730nm "far red" LEDs. It's a slightly past what a human eye sees well but it's compatible with visible light optics and it's reflected by skin well.
Guys I'm noticing this green tint on the glass/screen when the phone is tilted. Its green from all the angles, only when you look at the screen head on you see white. So all whites appear to be green when phone is tilted. This thing is screwing with my eye when I shift from PC to N6 or TV to N6.
Only at extreme angle the camera that I have is able to capture that green tint but to the eye it is visible at the slightest tilt.
Wanted to ask you if you'll are noticing similar issue? Can you please check, post pics from diff angle or even upload a video. It would be very helpful as I can go ahead and consider a replacement if the unit is defective.
Video (sorry about the quality)
https://www.youtube.com/watch?v=KFXjRy2sDUk&feature=youtu.be
The verge review mentioned this, mine have it but less noticeable, also didn't bother me at all, I never look the phone at that angles.
this is just a normal amoled thing i believe, my device has it too
Normal for AMOLED displays.
So what do you'll think? Should I ask for a replacement as it is more noticeable then the rest? When I'm on the PC and the phone is sitting on the desk right below the monitor from this angle the top half of the screen is green and the lower half is whitish. Is it normal in the case of amoled displays? Again this is my first device which has an amoled display, never used one before so my eyes may take time adjusting to it. I'm just worried about the unit being defective.
Check the screen for pink and yellow tint, there is a forum about it. The green/blue shift is normal as the nexus 6 uses last generation amoled screens like the ones found on the note 3 and galaxy s4
Sent from my Nexus 4 using XDA Free mobile app
Is this the yellow pink tint you speaking about? Didn't notice this thing until you mentioned. I think a replacement is needed ...what do you say?
First pic is at max brightness adaptive display setting turned off.
Second pic is the wallpaper I used
Third has brightness at 50% adaptive display setting turned off.
My Nexus has a pink patch on the screen so I'm going to get it replaced but people are saying that it is a lottery and you might get a worse device.
Give it a try, you've paid for the device and it is your right to receive a device without flaws
Sent from my Nexus 6 using XDA Free mobile app
This is better than you getting static noise when call and rattling vibrator scared to get replace it
Sent from my iPhone using Tapatalk
mustyrash said:
My Nexus has a pink patch on the screen so I'm going to get it replaced but people are saying that it is a lottery and you might get a worse device.
Give it a try, you've paid for the device and it is your right to receive a device without flaws
Sent from my Nexus 6 using XDA Free mobile app
Click to expand...
Click to collapse
does this pink or yellow spread or increased ?on mine it didn't .
tornido067 said:
does this pink or yellow spread or increased ?on mine it didn't .
Click to expand...
Click to collapse
I got the device replaced, new one didn't have any pink, I run a screen burn in app every now and then to keep it the screen fresh and even
Sent from my Nexus 6 using XDA Free mobile app
JHey guys! I just bought this phone earlier. Got some few questions
1.) Does the charger come with it is a Fast Charger? I got the "3 pronged" one
2.) Is it my eyes or the color temp of the screen is warmer? I adjusted the greens and blues so I could get the whites where my eyes are used to. Did you calibrate yours also? Do note the levels that I adjusted to "my natural white" . Took the picture with Zenfone Max
It comes with the fast charger..
The screen is as it should be imo. Will see if I can write more when I have the time ?
Sent from my F8131 using XDA-Developers mobile app
^ alright thanks. I think my reds are explosive
I noticed this if you quickly drag the brightness slider back and forth on a white screen, you do see a red tint
^ but mine is noticable even on stationary brigthness, and it is noticeable if the displayed color is white and red. My reds are way too extreme and and whites have pinkish tints. I took the sample pictures of the screen with crappy cam, but it is palpable when compare the pics side by side
lucifero13 said:
^ but mine is noticable even on stationary brigthness, and it is noticeable if the displayed color is white and red. My reds are way too extreme and and whites have pinkish tints. I took the sample pictures of the screen with crappy cam, but it is palpable when compare the pics side by side
Click to expand...
Click to collapse
You are right, the red is a bit extreme now that you mention it. but should i choose between this and Samsung and the oversaturation then I would go for this any day. It is much better than the bad displays on the older phones like the arc and z for not to mention the z1
Sent from my F8131 using XDA-Developers mobile app
HellRoot said:
You are right, the red is a bit extreme now that you mention it. but should i choose between this and Samsung and the oversaturation then I would go for this any day. It is much better than the bad displays on the older phones like the arc and z for not to mention the z1
Sent from my F8131 using XDA-Developers mobile app
Click to expand...
Click to collapse
It's an IPS LCD (according to GSMarena) and I have known that IPS is notorious for their backlight bleeding in computer monitors and I have seen a lot but idk if IPS on mobiles are reddish.