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What are defect pixels? - Nikon Coolpix 5700 Digital Camera

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Re: What are defect pixels?

Ocassionally images from digital cameras will have "defect" pixels. These pixels may appear in the final photograph as bright white, green or red spots that are out of place when compared to the rest of the image. Sometimes people call these spots "hot" or "dead" pixels. Notice the green defect pixel near the center of this image. Usually these pixels, and other types of "digital noise" appear in the darker or underexposed parts of images; additionally, images taken at longer exposure times are much more likely to have this issue. Many Nikon cameras have a "noise reduction" or "NR" process that fixes these problem areas. When NR is activated and image exposure times drop below 1/4 of a second the NR automatically processes the images as they are saved. This Noise Reduction feature is sometimes called "Night Portrait" or "Night Landscape" Scene Modes. If these spots are seen on images photographed under normal conditions (bright light with exposure times shorter than 1/4 second) then the camera may need to be sent in to a Nikon Service Center for repair.

Posted on Aug 29, 2005

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Lines appear in picture


Sound like a problem with the CCD sensor; this isn't a job that you could solve yourself. Some symptoms of a defective CCD (Charge Coupled Device) include distorted images or abnormal colors, scratchy purple lines, blank or black pictures, and/or black videos with good sound being recorded on the camera's flash card.

When a picture is taken, the CCD is struck by light coming through the camera's lens. Each of the thousands or millions of tiny pixels that make up the CCD convert this light into electrons. The number of electrons, usually described as the pixel's accumulated charge, is measured, then converted to a digital value.

If this defect occurs, the signal is not output from the CCD correctly when in shooting mode, which results in symptoms like the following in captured images. These symptoms can be confirmed on the LCD monitor. The same symptoms may also occur in recorded images.
* images do not appear
* images appear distorted

I suggest check THIS LINK for additional details in this previous solutions for an Defective CCD (Charge Coupled Device) and next contact your Sony service. I strongly suggest (taking into consideration the age of your camera) to evaluate the cost of repair versus the cost of a new camera with similar features, before making a final desicion.

Good luck.

Sep 16, 2011 | Sony Digital Cameras

1 Answer

Photos have a red dot in the center. Please assist in identifying a solution.


If it's just one pixel that's red, that's a common problem (sometimes called a "hot pixel") which can be addressed with the software that comes with the camera.  If it's a group of pixels or a bar or line, then there is likely some major defect on the image sensor itself.  If it's under warranty, you may want to contact Nikon support to see if they will do a warranty repair for you:
http://www.nikonusa.com/Service-And-Support/index.page
They will probably not do a repair if you are dealing with a hot pixel.

Mar 05, 2011 | Nikon D90 Digital Camera with 18-105mm...

1 Answer

The is a very small blue dot on my Canon xti screen


It can be regarded as normal, yes. All LCD screens will have a percentage of dead pixels, and no manufacturer will guarantee you get a dead-pixel screen on their products.

As you say it does not affect your photos and you can be assured it is not something that is going to get worse - it is a tiny manufacturing defect that is all, but within what they call acceptable limits.

If the camera is brand new you could always take it back and ask for another one, but they are within their rights (I believe) to say no for a single dead pixel.

Jan 25, 2009 | Canon EOS 400D / Rebel XTi Digital Camera

1 Answer

A week ago I purchased a Canon Ixus 970 digital camera. When using in dark conditions yesterday, I noticed two bright blue dots on the LCD screen. I've switched the camara off and on again and have...


You could try taking it back to the store if the (what seems like) the dead pixels are "distracting" you or "annoying" and if you are lucky you might get it exchanged.

It partially depends on the amount of the dead pixels present as for an LCD screen to be classed as being defective 0.01% of all of the pixels on the screen must be "dead".

God luck if you will try to exchange it.

Nov 07, 2008 | Canon Digital Cameras

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NEED TO CHANGE PHOTO RESOLUTION


■ Number of pixels
Select a higher number of pixels for clearer
pictures when printing.
Select a lower number of pixels [ ] (0.3M
EZ) to store more pictures. Fewer pixels also
means it is easier to send pictures by e-mail
or use them on a homepage.
■ When the aspect ratio setting is
[h]
DMC-LS75/DMC-LS70
(7M)
3072 × 2304 pixels
DMC-LS60 only
(6M)
2816 × 2112 pixels
DMC-LS75/DMC-LS70
(5M EZ)
2560 × 1920 pixels
(3M EZ) 2048 × 1536 pixels
(2M EZ) 1600 × 1200 pixels
(1M EZ) 1280 × 960 pixels
(0.3M EZ) 640 × 480 pixels

on the menu I believe the Panasonic calls it aspect ratio

Mar 06, 2008 | Panasonic Lumix DMC-LS75 Digital Camera

1 Answer

LCDscree


this sounds like a defective lcd screen, can be fixed but you will have to send it to nikon or go to a nikon service point , it all depends how many pixels are defective .. if ti is guarantee you are lucky otherwhise the costs would probably be higher to fix it than the pirce of a avarage new one

Oct 17, 2007 | Nikon Coolpix 7600 Digital Camera

1 Answer

Ricoh caplio gx 5.1 mega pixels


Email this problem to Ricoh Techincal Support Team This appears to be an internal defect.

May 26, 2007 | Ricoh Caplio GX Digital Camera

2 Answers

505V owners please help me! 505V noise?


I don't know if it's considered "normal" or not, but my F505V does the same thing. The original in the msg above was only 2 seconds -- take a look at it and see how it compares to yours.

Sep 11, 2005 | Sony Cyber-Shot DSC-F505V Digital Camera

1 Answer

What are defect pixels?


Ocassionally images from digital cameras will have "defect" pixels. These pixels may appear in the final photograph as bright white, green or red spots that are out of place when compared to the rest of the image. Sometimes people call these spots "hot" or "dead" pixels. Usually these pixels, and other types of "digital noise" appear in the darker or underexposed parts of images; additionally, images taken at longer exposure times are much more likely to have this issue. Many Nikon cameras have a "noise reduction" or "NR" process that fixes these problem areas. When NR is activated and image exposure times drop below 1/4 of a second the NR automatically processes the images as they are saved. This Noise Reduction feature is sometimes called "Night Portrait" or "Night Landscape" Scene Modes. If these spots are seen on images photographed under normal conditions (bright light with exposure times shorter than 1/4 second) then the camera may need to be sent in to a Nikon Service Center for repair. Notice the green defect pixel near the center of this image.

Aug 30, 2005 | Nikon Coolpix 3200 Digital Camera

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