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DPChallenge Forums >> Hardware and Software >> white pixel .. in all picture
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Showing posts 1 - 13 of 13, (reverse)
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02/24/2008 04:34:38 AM · #1
just yesterday i noticed a white pixel in all the shots i took in exactly the same place..
is that normal to happen.. or do i need to worry my camera sensor is starting to break down ?
02/24/2008 05:17:52 AM · #2
I'm not the most technically advanced person when it comes to cameras, but it may just be a single dead pixel on the sensor. I don't know if it means anything bad for the rest of everything, but simple cloning can fix it (it's pretty much the same as a dust speck. *shrug*
02/24/2008 05:24:25 AM · #3
Humm, well that sounds like either a: a hot pixel (which isn't all that fixable) or b: a very fine speck on your sensor. Select the sensor cleaning setting on your 350D and pop of the lens. Is there any junk on your sensor? If so, be very careful and use a Qtip or a dust blower to remove it. If not, you probably have a dead pixel. A good way to tell is to zoom in on it as far as you can get, and generally they have a pattern like four in a square with one in the middle, or something similar. Hope this helps!
Rich
02/24/2008 05:29:59 AM · #4
looking at 100% crop.. it looks like a dead pixel.. a single pixel sized spec is highly unlikely ..
i checked other sites and i think its a "stuck pixel" .. need i worry about that.. it doesnt bother me when i look at pictures, its only there when i look for it.. but should i worry about the sensor ?.. do i need to start shopping for a new camera body or something ? ...
02/24/2008 05:56:17 AM · #5
No, theres no need to worry. This is a normal thing that happens to many cameras as they begin to age. However, if you still have your Canon warranty, by all means send it in - and they should have no problem replacing the sensor for you. This shouldn't affect anything other the single pixel, its not "infectious" to the other pixels, in other words :). But to be honest, I wouldn't start looking for another camera just because of that. It takes all of 2 seconds to remove the spot with the clone tool in PS. So, I would just keep shooting away! Good luck!
02/24/2008 06:21:41 AM · #6
thats exactly what worries me.. that it would be infectious.. :) .. thanks..
02/24/2008 09:14:26 AM · #7
pardon my canon ignorance, but Sony has a feature that the camera on a monthly basis can self check to pixel map hot pixels to off so there isn't a need for post processing or repair. It might be worth seeing if your camera also has this feature.
02/24/2008 09:20:51 AM · #8
not sure if external fourm linking is allowed but this could help you out...

LINK

Message edited by author 2008-02-24 09:21:56.
02/24/2008 09:44:51 AM · #9
scarab, thats a very nice thread
02/24/2008 09:52:39 AM · #10
but did it work? :) There was allot of controversy about if it was working.
02/24/2008 10:06:28 AM · #11
havent tried it yet.. i'm at work.. i will do that when i go home and let ya know..
i'm .. curious about the post that states that doing that decreases sensor noise.. has anyone noticed noise level reduction after doing a sensor cleaning ?..
02/28/2008 01:00:17 PM · #12
what the... it WORKED!.. scarab, i tried the suggestion in your thread..and it actually worked..

just in case anyone is wondering here goes..

to clear a stuck pixel

with the lens on, enable sensor cleaning for a few seconds and turn off the camera..without actually cleaning the sensor or anything ( lens still mounted )
when i turned it on, the stuck pixel was gone ..

Message edited by author 2008-02-28 13:01:05.
02/28/2008 03:56:47 PM · #13
Originally posted by Cidpilot:

However, if you still have your Canon warranty, by all means send it in - and they should have no problem replacing the sensor for you.


That's a chuckle. They're not going to replace the sensor (the cost a lot). They're going to remap the pixels taking that pixel out of the bayer equation.
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