Interference pattern on camera with fluorescent lighting - Galaxy S II Q&A, Help & Troubleshooting

Note: THIS IS NOT A PINK SPOT POST
I noticed by accident that my camera generates what seems to be a interference pattern under fluorescent lighting. This interference pattern appears as vertical bars if the phone is held in portrait orientation or horizontal bars if held in landscape:
I then changed my light to incandescent and still saw the pattern:
'
With light off:
These pictures were taken of an off-white wall lit by a combination incandescent/fluorescent light using the back camera of my i9100.
Furthermore, the bars gradually progress from the left of the screen to the right (held in portrait).
In summary:
Vertical pattern of evenly-spaced alternation between dark and light
Pattern progresses (moves) from left to right.
Pattern is augmented by fluorescent lighting, but is present under incandescent as well.
PDA: I9100XXKG3
Phone/Camera firmware: TBEC28/OCEE09
Bonus points for noticing the dead fruit fly in both pics

Absolutely nothing extraordinary or strange. CFL lights flicker at mains frequency. If your camera's shutter hits a similar frequency, you'll get patterns such as the ones demonstrated.
It's an electronic (progressive) shutter. Get used to it
(PS: try it on a rotating bike wheel)
Sent from my GT-I9100 using XDA Premium App

I've noticed this when I first got the phone. It's as orcinus says it. The some lights flicker in a frequency that is made visible on the camera.
When taking a picture, turning Anti-Shake ON reduces seeing it on screen but it's pretty much not noticeable when you view the resulting picture after taking it. When taking a video i've noticed its more prominent when resolution are 720 or 1080p but much less when below those resolution.

I've noticed this too, I think this is pretty much expected on mobile phone camera.. Some DSLR's even have get this effect, I also get pretty badly saturated images under the said lighting conditions.

Is there any settings you can change on the phone to stop this from happening??

ljettinger said:
Is there any settings you can change on the phone to stop this from happening??
Click to expand...
Click to collapse
No there is no setting for it, All u have to do is avoid fluroscent light

@b1ind
I tested my samsung galaxy s II / beloved s advance on different light sources (magnetic ballast) :
-Fluorescenc lamp
-HPS (High Pressure Sodium street lamp)
-Mercury street lamp
-Metalhalide
-Polish metalhalide's prototype (LRJ).
This lines were there all the time. It is caused by phisical rights of electricity. Every light source is blinking but suuuuuuuper fast. We cant notice that , but cameras can. And this is the result.
Wysłane z Cyano-fonika 11 nightly...

Related

[Q] Camera pink hue :( anyone else?? - SOLVED (AUTO WB/INADEQUATE LIGHTING)

Auto WB issue! Video Link showing dynamic changing in light sources: http://www.youtube.com/watch?v=0F0x1wkt5EU
This ones to all you SGS2 owners...
Today whilst takin' pics of my son, i noticed whilst pointing the camera down at my cream coloured carpet a pink hue was clearly visible in the centre of the shot. I took a snap and the hue was on definitely there... this was during the day time with only ambient light from my large bay windows...
slowly panning up across the room towards the window it seems to fade away, but directly at the light surface its unmissable...
I double checked the shot on my partners DHD, her shot was completely pink, very poor camera!!
Anyone elses S2 suffering from this? a quick google search shows this has also been an issue on other handsets such as the Nexus One and Samsung Focus...
Cheers,
Dickie
This is very important.
Can you make some photos and upload it?
if someone more have the classic tint pink of cheap cameras like other HTCs I am going to cancel my order inmediately.
Here are some untouched Macro shots taken in my backyard in fading light with the Galaxy S II, was a bit windy so the flowers kept moving:
Click for full sized image
I don't know of any sansung Focus.
Can anyone shoot to white walls or cloudy sky?
It is the faster way to see if the camera have the pink tint.
Intratech said:
I don't know of any sansung Focus.
Click to expand...
Click to collapse
lol alright smart arse, edited
The shot! 8mp default settings
http://postimage.org/image/7zd9ak9w/
Dickie
just to add, this has been the only time ive noticed this issue, shots taken across the room show no visible signs of this, just the straight shot...
tbh, with the quality of all the other shots ive taken, its not a deal breaker for me, this phone still blows away any other ive used, and i don't find blank white walls/carpets interesting enough to take photos of...
Dickie
That sure looks like something I read about some HTC phone a while back. I'll need to check my phone to see. I wonder if it's software or hardware related.
after some testing i believe this is a software issue, specifically with the AUTO White Balance setting, as i point it to the cloudy sky out the window it looks perfect and when switched to incandescent it goes away!!
like i said before, i don't make a habit of shooting my carpet or my white walls very often!
Dickie
EDIT: when switched to Daylight mode, it also goes away, although it makes the carpet look orange for obvious reasons... Definitely a White Balance issue, the lighting and colour of the carpet requires the correct setting as opposed to the Auto mode, outside or with good lighting the Auto setting is fine! as far as i'm concerned, panic over! lol
dickie2007 said:
after some testing i believe this is a software issue, specifically with the AUTO White Balance setting, as i point it to the cloudy sky out the window it looks perfect and when switched to incandescent it goes away!!
like i said before, i don't make a habit of shooting my carpet or my white walls very often!
Dickie
EDIT: when switched to Daylight mode, it also goes away, although it makes the carpet look orange for obvious reasons... Definitely a White Balance issue, the lighting and colour of the carpet requires the correct setting as opposed to the Auto mode, outside or with good lighting the Auto setting is fine! as far as i'm concerned, panic over! lol
Click to expand...
Click to collapse
That it isn't a white balance issue, it is a hardware problem. HTC got the same problems on a lot of devices before, and they tried to hide it tweaking the colors, but that doesnt solve the real problem.
If I were you I will return the phone for another one.
kersh said:
That it isn't a white balance issue, it is a hardware problem. HTC got the same problems on a lot of devices before, and they tried to hide it tweaking the colors, but that doesnt solve the real problem.
If I were you I will return the phone for another one.
Click to expand...
Click to collapse
then why when i switch to the correct WB setting for the lighting i'm in does the issue disappear?? the issue only arrises in Auto mode under certain lighting conditions. just took a white sheet outside on Auto - No issue!
Dickie
Maybe in a non-auto mode they know the color temperature that software will apply to the image and then they can tweak the pink tint of the image, but with an auto mode that changes dinamically the color grade they cant adjust the pink tint.
I really dont know, but all of the pink tints problems in all other phones are hardware related issues, I don't know why this is going to be different.
i get exactly what you are saying, but i'm only going by what i'm working out on my device...
at the end of the day, like i said before, its not a deal breaker for me, and ive not had a single issue with it in other lighting conditions...
Also, ive just walked around my room allowing the camera to adjust dynamically, and it does disappear!! i have a standing lamp on, a small window on the opposite wall, and the large bay window at the front of the room, the pink hue is not permanent and is just the Auto WB not being perfect.
Its even visible on video, so i'll upload a vid of the pink disappearing as i walk around the room and the light changes dynamically! Auto WB issue for sure!!
Dickie
Just registered after seeing this...
A pink hue like you describe usually means infrared contamination, and happens on any camera to varying degree. Some black clothing in direct sunlight suffers the most.
Edit: Extreme Example: vimeo (dot) com/5637250
Regards, Matt
I'm just uploading a video to Youtube 720p - WB AUTO
You can clearly see the pink hue fading in and out as the phone auto adjusts to the varying lighting in my home, namely Incandescent light fittings, Fluorecent light fittings and daylight outside.
If i set the camera to a setting for one of those lighting conditions specifically, there is no issue in said condition.
I will update this post when its uploaded with the link - THIS IS NOT A PERMANENT HUE CAUSED BY HARDWARE - ITS SOFTWARE STRUGGLING WITH THE LIGHTING CONDITION!! - phew!!
Dickie
EDIT: the hue becomes very apparent after pointing the camera and any of the light sources directly then quickly moving to a white surface, it then gradually adjusts away...
LINK: http://www.youtube.com/watch?v=0F0x1wkt5EU
kersh said:
Maybe in a non-auto mode they know the color temperature that software will apply to the image and then they can tweak the pink tint of the image, but with an auto mode that changes dinamically the color grade they cant adjust the pink tint.
I really dont know, but all of the pink tints problems in all other phones are hardware related issues, I don't know why this is going to be different.
Click to expand...
Click to collapse
I doubt Samsung will use the low quality camera sensor that HTC uses buddy.
ScepticMatt said:
Just registered after seeing this...
A pink hue like you describe usually means infrared contamination, and happens on any camera to varying degree. Some black clothing in direct sunlight suffers the most.
Edit: Extreme Example: vimeo (dot) com/5637250
Regards, Matt
Click to expand...
Click to collapse
not sure its the same buddy, it appears in the centre of the image and fades out, i'm 100% certain that this issue is WB/lighting condition related, 10mins and the link will be up if your interested...
Dickie
Intratech said:
I doubt Samsung will use the low quality camera sensor that HTC uses buddy.
Click to expand...
Click to collapse
I can't agree more there, you should have seen the same shot on the Desire HD, the carpet was entirely pink!! not just a spot in the middle..
Dickie
BTW I just checked my phone and observed the same situation as described by Dickie. After checking for myself I'm certain it's software related. They may need to tweak their auto white balance algorithm.
Please see link above or in OP
Dickie

Muddy / dark band(s) on screen when dimmed?

Hi Guys - great phone which I've had a week or so now. Upgraded from the first Galaxy S.
Now I must admit to having very good eyesight (sometimes wish I couldn't see finer details!) and..
On white / grey images (download the various screen test apps to have a look for yourself)
The screen, when on a low brightness, is "muddy" and demonstrates a few vertical darker lines on the screen with mine showing quite a prominent one in the bottom right heading up about half way up the screen.
This is mostly visible when the brightness is at a minimum (regardless of auto or the powersaving options)
When the brightness is turned up it is barely visible, if at all... looks fantastic..
But.. at this point I preferred the screen on the Galaxy S which, when dimmed was more vibrant and didn't have this "problem"
Hands up who can see what I see? Any darker lines visible on your white / grey backgrounds? a side effect of this new subpixel arrangement? totally normal? some pixels not as bright in a row hence darker lines?
What do you guys think?
Cheers, B
W
Could you take a pic or something?
ASAP yes (no camera ironically so will have to ask a colleague!)
hold menu and press power button for screenshot off the device.
Yeah, mine set to minimum brightness and has some line artifacts like when LCD supplied with low voltage. (low brightness setting)
Easily noticeable when displaying grey colors.
I'm also using Screen Filter app, setting brightness even lower, some black points around 0.3cm is exposed at night.
Not sure those points are affected by anti-scratch film though.
Hola
I can confirm that I see the same "line banding" effect when using the device with low brightness. Like others have mentioned I also use the free Screen Filter app to get even lower brightness levels especially when reading stuff in bed in the near dark.
I would think this is a side issue with having the Super AMOLED Plus type screen but I guess only a Samsung tech can confirm.
intruda119 said:
hold menu and press power button for screenshot off the device.
Click to expand...
Click to collapse
Taking a screen shot wont show anything.. its the screen not the image
@ OP
http://forum.xda-developers.com/showthread.php?p=13444483#post13444483
http://forum.xda-developers.com/showthread.php?t=1065359
http://forum.xda-developers.com/showthread.php?t=1062966
65" long exposure exposing some black spots.(digitally enhanced)
Lowest brightness + Highest brightness.
Wondering those spots are caused by screen protector or defective screen or limitation of current AMOLED's.
You can see there is some current leak.(It should be bezel-like black if it is ideally off)
http://img691.imageshack.us/i/93767661.png/
http://img69.imageshack.us/i/36284360.png/
Not sure I understand you cpu98!
Is there a consensus we all have this "problem" - i'm on the verge of taking it back for a refund and "monitoring things"
Anyone understand the tech / spoken to Samsung?
B
Not sure what those black spots are... is your camera messed up? There's spots on the right even off the phone...
Also yes, pure black for SAMOLED still produces SOME light, but it's almost indistinguishable to the human eye.
Take a picture of a dark grey image on low brightness and it should show the bands the best...
cpu98 said:
65" long exposure exposing some black spots.(digitally enhanced)
Lowest brightness + Highest brightness.
Wondering those spots are caused by screen protector or defective screen or limitation of current AMOLED's.
You can see there is some current leak.(It should be bezel-like black if it is ideally off)
http://img691.imageshack.us/i/93767661.png/
http://img69.imageshack.us/i/36284360.png/
Click to expand...
Click to collapse
dinan said:
Not sure what those black spots are... is your camera messed up? There's spots on the right even off the phone...
Also yes, pure black for SAMOLED still produces SOME light, but it's almost indistinguishable to the human eye.
Take a picture of a dark grey image on low brightness and it should show the bands the best...
Click to expand...
Click to collapse
That spot off the phone is on the wall not defective cam. As you can see photos are taken at different angle. And it is visible in naked eye.
Yeah I like its screen very much. That black issues are no problem in real use.
I'm very satisfied.

[Q] Odd display issue when viewing black backgrounds in dark surroundings

Hello XDA,
I've searched around for this problem a bit, and it seems this issue hasn't been brought up anywhere. If it has, then I apologize.
The S2 has an awesome display with great colors, blacks included, but I noticed this issue one night when I was watching a film on my S2. When the display is showing black/dark images you can clearly see what appears to be glue smudges all over the screen, especially along the rims. It is only noticeable when there's little to no other light in the surrounding environement. Increasing brightness seem to worsen the problem.
It is hard to describe and very difficult to capture on camera but I made an attempt. I can't post links yet it seems but here's an imageshack url:
img842.imageshack.us/img842/5420/blotches.jpg
The image was taken with a Canon 450D with 20 sec exposure (hard to focus when it's that dark I'll tell you). Edited slightly in photoshop to cut down the size.
Here you can see the general color of the screen (gray-ish) and some of the blotches of (what I'm guessing is) glue in the back. If I had to guess I suspect the blotches might come from the capacitive touch layer of the screen. Is this an issue or is it to be expected on phones like these? It's not a major problem but it's actually quite annoying when you're watching a film/youtube clip/playing a generally dark game or whatever. Should I return my device? I've used it for just about a week and a half.
Thanks in advance for any help.
i have this too, its the AMOLED display. you can turn the screen off and on and you'll see it go off n on. not the sgs, but amoleds generally. my omnia HD had this too (1st gen AMOLED)
the blacks are not 100% black i say
Im having this too, nothing to worry about this as it doesnt disturb the beautiful display of this mobile.

Duff camera?

I think I have a duff camera on my new Z2, took some photos of a off white coloured box and a wooden desk and green horizontal banding on the photos. I also noticed what looks to be an oscillation in brightness when previewing a picture before taking the photo.
Has anyone else noticed this behaviour? I have requested a replacement as this is not something I have seen before and don't think it should be doing this.
The other query is about image stabilisation, stabilisation can be enabled in manual mode but cannot when using the superior auto mode, is this correct?
Thanks
Mine performs great. I'd ask for a replacement because it seems like a defect.
Fluorescent tube lighting by any chance?
Sent from my D6503 using Tapatalk
There was fluorescent lighting but it didn't affect an iphone taking the exact same picture, my old Galaxy S3 wasn't affected by fluorescent lights either. If the Z2 is affected that badly by lights in the ceiling it is pretty crap and will definitely be getting a refund.
We will see if the replacement is any better but I don't have a huge amount of confidence that it will be.
George_2010 said:
There was fluorescent lighting but it didn't affect an iphone taking the exact same picture, my old Galaxy S3 wasn't affected by fluorescent lights either. If the Z2 is affected that badly by lights in the ceiling it is pretty crap and will definitely be getting a refund.
We will see if the replacement is any better but I don't have a huge amount of confidence that it will be.
Click to expand...
Click to collapse
Should be an attachment showing the banding on the photograph.
Point any digital camera near a fluorescent light and you'll see why I asked that. It's not constant light, they pulse and taking photos of white objects bounces the pulsing back to the camera, iphones may be different due to a rolling shutter what ever that means but I know for a fact galaxy s3 did the same because I had two of them and I spent a long time in my flourescently lit shed trying to take photos of white snakes.
Look here and read the section on disadvantages and sub section on flicker effect.
http://en.m.wikipedia.org/wiki/Fluorescent_lamp
Sent from my D6503 using Tapatalk

Green tint to screen?

Not sure where to ask this, so here goes. Picked up a Z Play for my wife and it's great. Then picked up a Z for myself and while it looks and runs great, there seems to be a definite green tint to the screen when viewed off-center. And I don't mean 30-40 degrees off, but as slight as 5-10 degree off center, in any direction and it has a definite green tint, regardless of brightness setting. Previous AMOLED phones for either of us never had issues until extreme angles, and her Z Play is far better, not turning green til about 40-50 degrees, which is what I would expect.
Is this common or an issue? It's only been a few days, so I can go change it if it's a known issue of any kind. I guess I can also go compare it to display phones.
Mine doesn't appear to have this issue, perhaps a slightly noticeable change when 40° off but not at 5/10.
supacrazyguy42 said:
Mine doesn't appear to have this issue, perhaps a slightly noticeable change when 40° off but not at 5/10.
Click to expand...
Click to collapse
+1
Me neither, nothing remarkable happening when tilting it in either direction.
When the Moto Razr XT910 was new, there were many reports of varying panel quality problems, such as strong green or yellow tints
They did get new phones when they returned them, as it was a quality issue, could be the same thing now.
If I'm not mistaken, those with lots of green had field/cloud faults when viewing a black image in a dark room at full backlight, as they failed to reach zero brightness.
It was described as the pixels leaking electrons to surrounding pixels.
Viewing angles on the Z is worse than my old Moto X 2014 for sure, but it's probably due to the smaller pixels.
Nothing beats the old HTC One M7 though, that thing never faded, but it had an IPS screen.
However, in standard colour mode, it's heavily yellowish to reddish (some would call it warm colour temp)
In dynamic it's closer to white, but with a strong nudge to the blue spectrum.
Can't wait to get the custom colour temperature setting with Android 7.0!

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