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"Hot" pixel

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Offline fartymarty

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"Hot" pixel
« on: October 08, 2009, 02:16:15 PM »
My Canon has developed a couple of red pixels that were not there when new. It looks like East Texan might have a green one as well. They are easy enough to get rid of with post processing but I was curious if there were any tricks to "free" them up? I've googled it and it seems that I'm "stuck" with the stuckies. I'm asking here because the best photographers on this board may be smarter than the collective wisdom of Google (that was supposed to be a compliment, even if you interpreted it differently). I've read that by rapidly flashing different screen colors on LCD monitors with stuck pixels they can sometimes be eliminated. I'm sure that a CMOS sensor is different than an LCD, but then with what little I know perhaps there is a common link pixel-wise between a pixel device that captures light and one that displays it? Silly question no doubt, I wish I could say it was going to be my last one. :icon_rolleyes:
Fort Worth

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Offline Casa Grande

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Re: "Hot" pixel
« Reply #1 on: October 08, 2009, 03:15:39 PM »
they're dead....kaput....th ey are no more....they seize to be....unfortunately, there is no way to do a Frankenstein on them.    Even if it's under warranty, that may not be enough to be covered.  I know typically when the pixels fail, the manufacturers allow a certain amount before they will replace them.  Sorry  :icon_frown:

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Offline tjavery

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Re: "Hot" pixel
« Reply #2 on: October 08, 2009, 04:19:08 PM »
Not a silly question at all. As far as I know, they are goners. Just clone them out in post-processing.

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Offline badknees

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Re: "Hot" pixel
« Reply #3 on: October 08, 2009, 06:57:50 PM »
Well... If they are showing red, green, or blue, they aren't "dead" pixels, they are technically stuck pixels. While you can pretty easily clone them out during post, if the camera is still under warranty, get Canon to fix it.
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Offline The Scorpion

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Re: "Hot" pixel
« Reply #4 on: October 08, 2009, 07:15:06 PM »
canon can re-map the hot pixels which are either red, blue or green. if its under warranty, it will be worth having it done. if not under warranty it may cost to much to justify the cost.

a dead pixel is white and there is not much you can do

I have several hot and dead pixels on my Canon 20D and use the clone brush when needed

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Offline tjavery

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Re: "Hot" pixel
« Reply #5 on: October 08, 2009, 10:43:52 PM »
Here's something I just came across:

http://photography-on-the.net/forum/showpost.php?p=5807181&postcount=2

Probably won't change much, but I thought I'd share anyway.

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Offline fartymarty

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Re: "Hot" pixel
« Reply #6 on: October 09, 2009, 02:14:32 AM »
....they seize to be....
 :rolling: :icon_lol:  Hey I like that! I didn't know you were a punster.
Fort Worth

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Offline fartymarty

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Re: "Hot" pixel
« Reply #7 on: October 09, 2009, 02:17:32 AM »
Here's something I just came across:

http://photography-on-the.net/forum/showpost.php?p=5807181&postcount=2

Probably won't change much, but I thought I'd share anyway.
Thanks tj', I'll give it a shot and report back here.
Fort Worth

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Offline tjavery

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Re: "Hot" pixel
« Reply #8 on: October 09, 2009, 07:58:15 AM »
Here's something I just came across:

http://photography-on-the.net/forum/showpost.php?p=5807181&postcount=2

Probably won't change much, but I thought I'd share anyway.
Thanks tj', I'll give it a shot and report back here.

Okay... but don't expect much :icon_lol: I read all kinds of crazy stuff that people think about cameras.

There was this one guy a while back who proclaimed that the red, green, and blue dyes used to make the microscopic filters on Bayer pattern sensors would fade. He advised against making long exposures with your cameras and always keep your lens cap on (or camera turned off). I suppose that "advice" applied more to point-n-shoots, since DSLRs have shutters that cover up their sensors when not actually taking a photo.

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Offline fartymarty

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Re: "Hot" pixel
« Reply #9 on: October 18, 2009, 07:59:50 PM »
Here's something I just came across:

http://photography-on-the.net/forum/showpost.php?p=5807181&postcount=2

Probably won't change much, but I thought I'd share anyway.
Thanks tj', I'll give it a shot and report back here.


Okay... but don't expect much :icon_lol: I read all kinds of crazy stuff that people think about cameras.


 I think it worked. :eusa_dance: I tried this several days ago and the test shots were clean, but since I still had my
doubts I didn't post anything. I took some pictures at a wedding last night and today I couldn't find any red pixels.  :crossedfingers:
It doesn't make sense, but so far it seems to have worked.
Thanks tj!
Fort Worth

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Offline tjavery

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Re: "Hot" pixel
« Reply #10 on: October 18, 2009, 09:55:20 PM »
Hey no problemo. I was just passing along info that I found.

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Offline Casa Grande

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Re: "Hot" pixel
« Reply #11 on: October 19, 2009, 09:08:22 AM »
sweet!  I've bookmarked it in case it happens to my new one.....thanks for sharing this.

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Offline tjavery

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Re: "Hot" pixel
« Reply #12 on: October 19, 2009, 09:34:11 AM »
sweet!  I've bookmarked it in case it happens to my new one.....thanks for sharing this.

New one? Whad-ya-get??? :icon_lol:

 


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