Coolpix 5700 dead pixel?

Started Jan 27, 2003 | Discussions
Shop cameras & lenses ▾
Hansplast26
Hansplast26 Senior Member • Posts: 1,247
Coolpix 5700 dead pixel?

I've experienced some strange pixel on my new 5700.

Sometimes I see a light purple pixel on a frame which was taken with a slow shutter time (e.g. inside in the evening). This pixel is at a certain fixed point. This pixel appears not often, but I know how to reproduce this 'problem'.

I've seen dead pixels on other camera's which appeared in all circumstances, but this is something odd. So is it a dead pixel, and if so, should I go back and how to convince the guys in the store that this sometimes-appearing-dead-pixel is a dead pixel?

Cheers,

Hans

 Hansplast26's gear list:Hansplast26's gear list
Leica Q
kccheng Regular Member • Posts: 278
Re: Coolpix 5700 dead pixel?

it is a hot pixel. showing up in long shutter. you can enable NR in camera setting for such siturations, or send it back to nikon to get it "mapped" out, or see the "4500 has a raw mode" thread to check out the home made software to MAP the pixel out.

map it out means to tell the camera to replace the problematic pixel with nearby pixel. so you will never see it again.

of course doing such operation on your beloved camera with a beta/alphar home made software is a bit risky. you can always wait longer for it to stableize. good news is some people are already getting good result in this software already.
--
Ka-Chun Cheng
Nikon 5K7
http://www.biblecrawler.com

Ron T Senior Member • Posts: 1,712
Re: Coolpix 5700 dead pixel?

Hans,

Here is a link for free pixel test software.

http://www.starzen.com/imaging/deadpixeltest.htm

Ron T

Hans Eichbaum wrote:

I've experienced some strange pixel on my new 5700.
Sometimes I see a light purple pixel on a frame which was taken
with a slow shutter time (e.g. inside in the evening). This pixel
is at a certain fixed point. This pixel appears not often, but I
know how to reproduce this 'problem'.
I've seen dead pixels on other camera's which appeared in all
circumstances, but this is something odd. So is it a dead pixel,
and if so, should I go back and how to convince the guys in the
store that this sometimes-appearing-dead-pixel is a dead pixel?

Cheers,

Hans

Hansplast26
Hansplast26 OP Senior Member • Posts: 1,247
Re: Coolpix 5700 dead pixel?

Thanks for your help sofar,

So I've a hot pixel, the software tool isn't a great help, i trust my own findings a bit more.

Currently this hotpixel doesn't annoy me at all, it only appears sometimes. I can be that it will annoy me in the near future and then I will certainly go back to the shop. Or when I am in an experimental mood, do it myself with the software mentioned in an earlier reply:)

Hans

Ron T wrote:
Hans,

Here is a link for free pixel test software.

http://www.starzen.com/imaging/deadpixeltest.htm

Ron T

Hans Eichbaum wrote:

I've experienced some strange pixel on my new 5700.
Sometimes I see a light purple pixel on a frame which was taken
with a slow shutter time (e.g. inside in the evening). This pixel
is at a certain fixed point. This pixel appears not often, but I
know how to reproduce this 'problem'.
I've seen dead pixels on other camera's which appeared in all
circumstances, but this is something odd. So is it a dead pixel,
and if so, should I go back and how to convince the guys in the
store that this sometimes-appearing-dead-pixel is a dead pixel?

Cheers,

Hans

 Hansplast26's gear list:Hansplast26's gear list
Leica Q
Terry Talton Junior Member • Posts: 42
I tried the CCD_Defect software...

that was brought up in the 4500 Raw Mode discussion on my 5700. I had a bright pink hot pixel that was showing up in all pictures at all speeds without NR.

The software said it found and mapped out 459 hot pixels which seemed a bit high to me but the one I was concerned about is definitely gone now.

I took a few test shots after remapping and it looks like it worked just fine. No hot or dead pixels and I can't see any artifact in the pictures where the pixel was.

Overall I'd say it worked beautifully.

IMHO, YMMV, CYA, BYOB, Enter at your own risk, etc...

Terry

Hansplast26
Hansplast26 OP Senior Member • Posts: 1,247
Re: I tried the CCD_Defect software...

I've not yet looked into this sofware, because the search functionality at this forum is currently unavailable. I am wondering if it is possible to give the x,y coordinate of the hot pixel manually, or is the software that sophicated that it thinks is able to detect the dead/hot pixels on its own?

Cheers,
Hans

Terry Talton wrote:

that was brought up in the 4500 Raw Mode discussion on my 5700. I
had a bright pink hot pixel that was showing up in all pictures at
all speeds without NR.
The software said it found and mapped out 459 hot pixels which
seemed a bit high to me but the one I was concerned about is
definitely gone now.

I took a few test shots after remapping and it looks like it worked
just fine. No hot or dead pixels and I can't see any artifact in
the pictures where the pixel was.

Overall I'd say it worked beautifully.

IMHO, YMMV, CYA, BYOB, Enter at your own risk, etc...

Terry

 Hansplast26's gear list:Hansplast26's gear list
Leica Q
Terry Talton Junior Member • Posts: 42
The software maps them on it's own.

There is no way to manually specify location.

Austin_316 Senior Member • Posts: 1,932
Do you have to buy this or is it a download, do you...

Have a link? thanks tons!
Michael

Terry Talton wrote:

that was brought up in the 4500 Raw Mode discussion on my 5700. I
had a bright pink hot pixel that was showing up in all pictures at
all speeds without NR.
The software said it found and mapped out 459 hot pixels which
seemed a bit high to me but the one I was concerned about is
definitely gone now.

I took a few test shots after remapping and it looks like it worked
just fine. No hot or dead pixels and I can't see any artifact in
the pictures where the pixel was.

Overall I'd say it worked beautifully.

IMHO, YMMV, CYA, BYOB, Enter at your own risk, etc...

Terry

-- hide signature --

Michael

Terry Talton Junior Member • Posts: 42
Here it is...

http://e2500.narod.ru/ccd_defect.htm

The page is not in English but the utility is.
I used version V0.05

Here's a link to the thread where I found it:
http://forums.dpreview.com/forums/read.asp?forum=1007&message=4228226

Terry

nino Regular Member • Posts: 142
it works on a Nikon 4500

Had a hot pixel in my nikon 4500
It worked just great. Amazing.
I have put in my website a black picture before and after the remapping.

Just great.
Thanks to this guy
NN

-- hide signature --

I've seen things you people wouldn't believe.
Attack ships on fire off the shoulder of Orion.
I watched c-beams ... glitter in the dark near Tanhauser Gate.
All those ... moments will be lost ... in time, like tears ... in rain.
Time ... to die.

http://www.pbase.com/ninonino

RPK Senior Member • Posts: 1,104
Re: Coolpix 5700 dead pixel?

Where do we find that home made pixel mapping software? My 5700 also has a dead pixel right in the middle of the frame, white hot.

This camera is headed back to OM for a replacement anyhow, no big deal BUT I would like to have the ability to map out the dead ones next time.

My 995 was plauged with dead pixels, had three different cameras.

RPK Senior Member • Posts: 1,104
Re: Coolpix 5700 dead pixel?

The website listed is for the test, now where do we get the mapping software?

A simple test would be to take a frame wit the lens cap on. It will show you every little spot in the image. Nice black background too!

DaniR Forum Member • Posts: 60
Fine for my 4500 too

My 4500 has been fixed with this proggie too.

Cheers again for the programmer.

kitgard Senior Member • Posts: 1,067
Re: Fine for my 4500 too

DaniR wrote:

My 4500 has been fixed with this proggie too.

Cheers again for the programmer.

in my cp4500 works fine TWO times
thx to the guy who make this possible

rgs.
cp4500, tc-e2
http://www.pbase.com/kitgard

baw Senior Member • Posts: 1,025
Re: Coolpix 5700 dead pixel?

http://e2500.narod.ru/ccd_defect_e.htm

Here is the english version of the website with the Hotpixel removal software.

A brilliant trick of the programmer, he just uses a routine in the camera's firmware that maps out the hotpixels.

Make sure the camera has been off for some time (perhaps even cool it for a couple of hours) otherwise you will map out 512 pixels (the maximum table length)

After remapping my 5700 i took some lenscap tiff's and checked them with the deadpixeltest program. Only pixels with a luminance of 1 showed up. So my CCD is near perfect!

I have 276 removed hotpixels on my CCD.

-- hide signature --

Success

Ben

Nikon 5700 Sunpak MZ440AF

Marty Scher B Senior Member • Posts: 1,205
What version of firmware do you have?

Glad it had worked for you.

I have 1.0.

Thanks

baw wrote:

http://e2500.narod.ru/ccd_defect_e.htm

Here is the english version of the website with the Hotpixel
removal software.
A brilliant trick of the programmer, he just uses a routine in the
camera's firmware that maps out the hotpixels.
Make sure the camera has been off for some time (perhaps even cool
it for a couple of hours) otherwise you will map out 512 pixels
(the maximum table length)

After remapping my 5700 i took some lenscap tiff's and checked them
with the deadpixeltest program. Only pixels with a luminance of 1
showed up. So my CCD is near perfect!

I have 276 removed hotpixels on my CCD.

-- hide signature --

Success

Ben

Nikon 5700 Sunpak MZ440AF

baw Senior Member • Posts: 1,025
Re: What version of firmware do you have?

1.0 as well.

-- hide signature --

Success

Ben

Nikon 5700 Sunpak MZ440AF

xcutter Senior Member • Posts: 1,076
Re: Coolpix 5700 dead pixel?

RPK
Why is the camera going back to OM? Is their a defect besides the hot pixel?
--
Rich B.
http://www.pbase.com/xcutter/galleries
CP5700, PS7

RPK wrote:

Where do we find that home made pixel mapping software? My 5700
also has a dead pixel right in the middle of the frame, white hot.

This camera is headed back to OM for a replacement anyhow, no big
deal BUT I would like to have the ability to map out the dead ones
next time.

My 995 was plauged with dead pixels, had three different cameras.

baw Senior Member • Posts: 1,025
Hotpixel mapping success

It would be interesting to hear from other Nikon users how they did with the hotpixel remapping software.

Especially how many pixels were remapped after using this software, and how they achieved this (camera cooling etc.)

http://e2500.narod.ru/ccd_defect_e.htm

-- hide signature --

Success

Ben

Nikon 5700 Sunpak MZ440AF

RPK Senior Member • Posts: 1,104
Re: Hotpixel mapping success

Has anyone tried this with the 5700? Can you UN-map those bad pixels at some point? Meaning, is this a reversible process or?

Keyboard shortcuts:
FForum MMy threads