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ELM & HAZEL Camera blue-yellow lines issue Discuss |
pavithra_uk
Joined: Oct 15, 2009
Posts: 100
From: Sri Lanka
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Almost every Elm and Hazel owners facing this problem Blue-Yellow lines appear on the night photos.
I start this thread for discuss it with experts
I suspect about these:
1. Image processing & Noise reduction problem
2. Camera module to CPU data transfer corruption
3. An Interferance or Sync problem
4. Senser have some weak pixels. these weak pixels capture day light perfectly but they faild with low/artificial lighting.
(to reduce cost, they making sensers with high fault tolerance????? may be?)
I have no idea this lines get wrose with age. Anyone experienced it ?
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reeflotz
Joined: Jun 15, 2010
Posts: > 500
From: Philippines
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Bono found out that decreasing the ev value on dark shots lessens or eliminates these lines, while increasing ev value on dark shots makes them appear more visible. It appears on the screen itself even before taking the picture 
Switching to twilight mode on night shots also helps lessen/remove these lines. I don't know if it's because the sensor is forcing itself to sense light in dark photos that in the process it strains itself then produces these horizontal lines 
Some shots seems fine, as long as there is a single source of light enough to balance the image even if the rest is dark it seems these lines do not appear.
Btw, just sharing this, I really don't know anything much about those codes in cameradrivers, or those sensors on Elm/Hazel
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xclbr
Joined: May 18, 2010
Posts: 113
From: PH
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@reeflotz. So this means not all lowlight shots has those blue-red etc lines.. so this raises the possibility that a firmware update can fix this. Hurray! new hope.  |
pavithra_uk
Joined: Oct 15, 2009
Posts: 100
From: Sri Lanka
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This one is taken from Elm (from Esato photo gallery) and adjusted levels
This one is taken from C901 (from Esato photo gallery) and adjusted levels
even C901 photos has very faint lines.
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pavithra_uk
Joined: Oct 15, 2009
Posts: 100
From: Sri Lanka
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On 2010-12-08 06:02:09, xclbr wrote:
@reeflotz. So this means not all lowlight shots has those blue-red etc lines.. so this raises the possibility that a firmware update can fix this. Hurray! new hope.
yes. if it hardware fault, every photos must contain these lines. it may be firmware bug that convert noise into blue line.
such lines can be seen in K750's viewfinder display while taking photos in low light condition. but its no visible as elm's since K750i has no noise reduction. |
reeflotz
Joined: Jun 15, 2010
Posts: > 500
From: Philippines
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@xclbr
yeah I'm also hoping that this issue will be fixed.
@pavithra_uk
nice research, Elm/Hazel's horizontal lines does look like those classic lowlight color noise and are much more evident because the scattered color noise were removed and only the lines were left.
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pavithra_uk
Joined: Oct 15, 2009
Posts: 100
From: Sri Lanka
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most of SE phones produce these lines but they invisible to human eye. to see such lines, you have to adjust contrast, brightness, gamma etc..
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mriley
Joined: Oct 03, 2009
Posts: > 500
From: UK
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I think it's an issue with the sensor so can't be fixed
Esato's Newbie of the year and Most Helpful Member 2010!  ------------------- Life is just a ride, enjoy it while you can |
Bonovox
Joined: Apr 13, 2008
Posts: > 500
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Its a shame really from such a good camera 
Phone?? What phone?? |
pavithra_uk
Joined: Oct 15, 2009
Posts: 100
From: Sri Lanka
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On 2010-12-09 19:11:40, mriley wrote:
I think it's an issue with the sensor so can't be fixed
how you say its senser issue ?
will every senser has same issue or every senser has hadware fault even in differant production batch..? |
reeflotz
Joined: Jun 15, 2010
Posts: > 500
From: Philippines
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well, whether it can be fixed or not it's okay with me, besides, Hazel doesn't have that good of a LED flash and I wasn't expecting much from it for lowlight when I bought it since it only has LED flash.
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zAlbee
Joined: Nov 14, 2010
Posts: 33
From: North America
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It looks like the sensor is overly-sensitive in those horizontal lines. That's why you don't notice it with low exposure -- it's there, you just don't see it. If it's a hardware fault, then firmware isn't going to fix it...
But I don't really know how the sensor works, so who knows.
Ah, and I am seriously considering buying this camera, I mean phone, too.
Nokia 3360 (2002) - Moto V551 (2005) -  w580i white (2007) - w760i red (2009) - Hazel J20i black (2010) |
mriley
Joined: Oct 03, 2009
Posts: > 500
From: UK
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@pavi
I think they reduced cost by buying a poor sensor to put on the elm.
I own the elm and people say the camera is great but I dont really think it is. The phone can only take good photos in good light, and just about any decent camera can do that. It really is terrible in low light and the flash isnt a flash, its a camera light (they need to stop saying led flash)
Even in daylight photos you still get these lines across the photos, you can make them out in shaded areas where its smeared.
People see the elms camera as being very good because of the huge amount of sharpening it puts on its photos during in-camera processing which makes the photos very very sharp, sometimes unnauraly sharp
Esato's Newbie of the year and Most Helpful Member 2010! ------------------- Life is just a ride, enjoy it while you can |
laffen
Joined: Aug 07, 2001
Posts: > 500
From: Oslo, Norway
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It is a phenomena called banding noise. It is often visible in low light and / or when high ISO is used. It is not an uncommon problem. Even Canon's most expensive camera at the time had this problem |
mriley
Joined: Oct 03, 2009
Posts: > 500
From: UK
PM |
Thanks laffen  now we finally know what this is.
Banding noise is highly camera-
dependent, and is noise which is
introduced by the camera when it reads data from the digital
sensor. Banding noise is most
visible at high ISO speeds and in the shadows, or when an image has been excessively brightened.
Banding noise can also increase
for certain white balances,
depending on camera model.
Esato's Newbie of the year and Most Helpful Member 2010! ------------------- Life is just a ride, enjoy it while you can |
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Posted: 2010-12-07 16:34
Hazel J20i [Bricked], Sony Xperia Go 
