I just noticed that my Canon A520 seems to have developed a dead pixel.
It appears it started to 'die' around a month ago. Now in every dark
picture, that one pixel comes out to be bright red.
What are the various methods to deal with such dead pixels other than
buying a new camera?
H.S. wrote:
>
> Hello,
>
> I just noticed that my Canon A520 seems to have developed a dead pixel.
> It appears it started to 'die' around a month ago. Now in every dark
> picture, that one pixel comes out to be bright red.
>
> What are the various methods to deal with such dead pixels other than
> buying a new camera?
>
> thanks,
> Sam.
If you can live with the bother, fixing in any decent photo editor is
trivial. I assume that is all that is wrong and one hopes the problem
doesn't grow with time. Silly question but you do mean main sensor and
not the viewing lcd?
Dave Cohen
"Dave Cohen" <user@example.net> wrote in message
news:VM3uj.5075$kD3.4070@trnddc08...
> H.S. wrote:
>>
>> Hello,
>>
>> I just noticed that my Canon A520 seems to have developed a dead pixel.
>> It appears it started to 'die' around a month ago. Now in every dark
>> picture, that one pixel comes out to be bright red.
>>
>> What are the various methods to deal with such dead pixels other than
>> buying a new camera?
>>
>> thanks,
>> Sam.
>
It is hardly a major problem, just make do with the remaining 3871487
pixels.
Dave Cohen wrote:
> H.S. wrote:
>>
>> Hello,
>>
>> I just noticed that my Canon A520 seems to have developed a dead
>> pixel. It appears it started to 'die' around a month ago. Now in every
>> dark picture, that one pixel comes out to be bright red.
>>
>> What are the various methods to deal with such dead pixels other than
>> buying a new camera?
>>
>> thanks,
>> Sam.
>
> If you can live with the bother, fixing in any decent photo editor is
> trivial. I assume that is all that is wrong and one hopes the problem
> doesn't grow with time. Silly question but you do mean main sensor and
> not the viewing lcd?
> Dave Cohen
I am going to give Gimp a try. And, yes, the main sensor.
On Sun, 17 Feb 2008 13:47:09 -0500, "H.S." <hs.samix@gmail.com> wrote in
<d60d0$47b8812d$4c0a97f8$20793@TEKSAVVY.COM-Free>:
>I just noticed that my Canon A520 seems to have developed a dead pixel.
>It appears it started to 'die' around a month ago. Now in every dark
>picture, that one pixel comes out to be bright red.
>
>What are the various methods to deal with such dead pixels other than
>buying a new camera?
Some cameras have the ability to map out dead pixels (interpolating them
from nearby pixels). Check your manual.
--
Best regards,
John Navas
Panasonic DMC-FZ8 (and several others)
On Feb 17, 7:21 pm, "Roy G" <roy.gibs...@virgin.net> wrote:
> "Dave Cohen" <u...@example.net> wrote in message
>
> news:VM3uj.5075$kD3.4070@trnddc08...
>
> > H.S. wrote:
>
> >> Hello,
>
> >> I just noticed that my Canon A520 seems to have developed a dead pixel.
> >> It appears it started to 'die' around a month ago. Now in every dark
> >> picture, that one pixel comes out to be bright red.
>
> >> What are the various methods to deal with such dead pixels other than
> >> buying a new camera?
>
> >> thanks,
> >> Sam.
>
> It is hardly a major problem, just make do with the remaining 3871487
> pixels.
>
> Roy G
The easiest method is the clone tool. Just zoom it way up, use the
clone tool to copy an adjacent pixel. Even better, set clone opacity
to about 25% and clone from four close neighbors surrounding the dead
one.
On Mon, 18 Feb 2008 06:40:10 -0800 (PST), Don Stauffer in Minnesota
<stauffer@usfamily.net> wrote in
<28dd94de-d781-47fa-98ee-d0e047139e49@64g2000hsw.googlegroups.com>:
>On Feb 17, 7:21 pm, "Roy G" <roy.gibs...@virgin.net> wrote:
>> "Dave Cohen" <u...@example.net> wrote in message
>>
>> news:VM3uj.5075$kD3.4070@trnddc08...
>>
>> > H.S. wrote:
>> >> I just noticed that my Canon A520 seems to have developed a dead pixel.
>> >> It appears it started to 'die' around a month ago. Now in every dark
>> >> picture, that one pixel comes out to be bright red.
>>
>> >> What are the various methods to deal with such dead pixels other than
>> >> buying a new camera?
>> It is hardly a major problem, just make do with the remaining 3871487
>> pixels.
>The easiest method is the clone tool. Just zoom it way up, use the
>clone tool to copy an adjacent pixel. Even better, set clone opacity
>to about 25% and clone from four close neighbors surrounding the dead
>one.
Automate and simplify with the Photoshop Spot Healing Brush Tool with a
Size of (say) 4 pixels.
--
Best regards,
John Navas
Panasonic DMC-FZ8 (and several others)
H.S. wrote:
>
> Hello,
>
> I just noticed that my Canon A520 seems to have developed a dead pixel.
> It appears it started to 'die' around a month ago. Now in every dark
> picture, that one pixel comes out to be bright red.
>
> What are the various methods to deal with such dead pixels other than
> buying a new camera?
>
> thanks,
> Sam.
Dead/stuck/hot pixels are one of the things digital evangelists never
mention. If your camera has 'grown' one, it will no doubt grow more as
time passes.
A simple image editor will do fine for a few. When you get dozens of
the things, you can use layer subtraction or one of several programs to
automatically subtract out the pretty spots. Layer subtraction tends to
leave halos and artifacts, particularly when working on JPEG compressed
images. The more sophisticated programs are smarter and leave fewer
'scars' on the image.
In article <q54ir35jgnql32v6kgh895aeu7q14mcu2n@4ax.com>, John Navas <spamfilter1@navasgroup.com> wrote:
>On Sun, 17 Feb 2008 13:47:09 -0500, "H.S." <hs.samix@gmail.com> wrote in
><d60d0$47b8812d$4c0a97f8$20793@TEKSAVVY.COM-Free>:
>
>>I just noticed that my Canon A520 seems to have developed a dead pixel.
>>It appears it started to 'die' around a month ago. Now in every dark
>>picture, that one pixel comes out to be bright red.
>>
>>What are the various methods to deal with such dead pixels other than
>>buying a new camera?
>
>Some cameras have the ability to map out dead pixels (interpolating them
>from nearby pixels). Check your manual.
>
I would imagine they all do that initially after production.
On Tue, 19 Feb 2008 15:51:58 GMT, zekfrivo@zekfrivolous.com (GregS)
wrote in <fpetut$do8$1@usenet01.srv.cis.pitt.edu>:
>In article <q54ir35jgnql32v6kgh895aeu7q14mcu2n@4ax.com>, John Navas <spamfilter1@navasgroup.com> wrote:
>>On Sun, 17 Feb 2008 13:47:09 -0500, "H.S." <hs.samix@gmail.com> wrote in
>><d60d0$47b8812d$4c0a97f8$20793@TEKSAVVY.COM-Free>:
>>
>>>I just noticed that my Canon A520 seems to have developed a dead pixel.
>>>It appears it started to 'die' around a month ago. Now in every dark
>>>picture, that one pixel comes out to be bright red.
>>>
>>>What are the various methods to deal with such dead pixels other than
>>>buying a new camera?
>>
>>Some cameras have the ability to map out dead pixels (interpolating them
>>from nearby pixels). Check your manual.
>
>I would imagine they all do that initially after production.
Why would you want to buy a camera that can't do that at any time,
manually or automatically?
--
Best regards,
John Navas
Panasonic DMC-FZ8 (and several others)
how to deal with dead pixels 
Linear Mode
