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pavithra_uk Posts: 100

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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Posted: 2010-12-07 16:34:03
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reeflotz Posts: > 500

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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Posted: 2010-12-08 04:31:56
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xclbr Posts: 113

@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.

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Posted: 2010-12-08 06:02:09
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pavithra_uk Posts: 100

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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Posted: 2010-12-08 06:03:34
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pavithra_uk Posts: 100

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.
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Posted: 2010-12-08 07:17:19
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reeflotz Posts: > 500

@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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Posted: 2010-12-08 10:07:57
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pavithra_uk Posts: 100

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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Posted: 2010-12-08 16:06:50
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mriley Posts: > 500

I think it's an issue with the sensor so can't be fixed
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Posted: 2010-12-09 19:11:40
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Bonovox Posts: > 500

Its a shame really from such a good camera

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Posted: 2010-12-09 22:45:04
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pavithra_uk Posts: 100

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..?
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Posted: 2010-12-10 03:16:58
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