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Brad Fitzpatrick

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things breaking [Mar. 15th, 2002|10:18 pm]
Brad Fitzpatrick
I think my digital camera is going bad --- dead pixels in CCD?
My computer speakers also are going bad -- left one dying.
*sigh*
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Comments:
[User Picture]From: eli
2002-03-15 10:25 pm (UTC)

How Many?

How many pixels are out? It's not uncommon for 3+ megapixel cameras to have a dead one. I spotted one on mine and got pissed...did some research and found that it happens a lot. If there's more than one...in multiple spots....then I'd be pissed.
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[User Picture]From: brad
2002-03-15 10:32 pm (UTC)

Re: How Many?

It should be engineered around, if that is the case.

It's feasible to both detect that and interpolate surrounding good pixels onto the dead ones.

Several are showing up on mine. With dark pictures, it's very annoying to have a bunch of bright green dots.


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From: q
2002-03-15 10:37 pm (UTC)

Re: How Many?

It wouldn't be a huge challenge to map your dead pixels and filter them out, would it? I bet you could even scheme it with gimp.
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[User Picture]From: brad
2002-03-15 10:40 pm (UTC)

Re: How Many?

But really, it needs to be done at the level before it's converted to a JPEG, since with JPEG compression a single dead pixel on the CCD can bleed into several dead pixels when the JPEG is decompressed.
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From: q
2002-03-15 10:45 pm (UTC)

Re: How Many?

True, with the quality turned down it would leave nasty artifacts.
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[User Picture]From: brad
2002-03-15 10:47 pm (UTC)

Re: How Many?

As a last resort, I can just use RAW mode on the camera, and download TIFF files, then do my cleanup and JPEG conversion.

But then I'm limited to but a few pictures on my camera at a time. :-/

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[User Picture]From: whitaker
2002-03-15 11:58 pm (UTC)

Re: How Many?

New plan:

Drive to Nikon-land and bust on them foo's!
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[User Picture]From: eli
2002-03-15 10:56 pm (UTC)

Re: How Many?

just don't take compressed pictures...who needs jpegs
buwa haha ha ha ha :-)
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[User Picture]From: tufchoice
2002-03-15 10:54 pm (UTC)

Re: How Many?

that happened to me once and i thought the same thing you are thinking, but it turned out to be something else. course, i forget now, but it wasn't the camera. maybe it was something to do with the color depth, or the image viewer, or the graphics driver... or something. i forget. unless it's the same pixels in every picture, there is still hope that it is something else. if it is really going bad... that sucks. especially since i got my camera a couple months after you got yours. that means mine might start dieing soon too:(
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[User Picture]From: eli
2002-03-15 10:55 pm (UTC)

Re: How Many?

Several is fucked up. I guess some cameras DO try to correct for it by evaluating the average color of surrounding pixels and guessing. I read somewhere about having your camera re-calibrated if they start to show up...but I don't know what the fuck that means. If you look closely when watching a video shot with a digital camcorder, you can also sometimes pick out dead pixels. Somebody needs to come up with a better CCD or a fix I guess.


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[User Picture]From: tydel
2002-03-15 10:58 pm (UTC)
Quit playing that funky music so loud, white boy! *breaks out into a dance* :P
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