dots (blue/white) visible in images...HELP!

  • Thread starter Thread starter v.w.
  • Start date Start date
V

v.w.

Hi,

I tried 3 different new digital cameras (sanyo, fujitsu siemens and now "BenQ DC C50") and all of them have one or more blue / white dots in their images, if the images are dark (when I look at them on my pc-monitor). In bright images they seems to disappear. The dots are always on the same place. I tried to clean the objective, but it didn't change anything.

Does anybody know the reason?
Is this usually for digital cameras (< 200 EUR)?

Best regards,
v.w.
 
v.w. said:
Hi,

I tried 3 different new digital cameras (sanyo, fujitsu
siemens and now "BenQ DC C50") and all of them have one
or more blue / white dots in their images, if the images
are dark (when I look at them on my pc-monitor). In
bright images they seems to disappear. The dots are
always on the same place. I tried to clean the objective,
but it didn't change anything.

Does anybody know the reason?
Is this usually for digital cameras (< 200 EUR)?

Best regards,
v.w.
Click to expand...
====================================
Maybe the following article
will offer some ideas:
http://tinyurl.com/6m2hv

--

John Inzer
Picture It! MVP
return e-mail disabled

Picture It! Support Center
http://tinyurl.com/2po2o

Digital Image Support Center
http://tinyurl.com/3xxqg
 
It may be something other than the cameras if the dots appear in the same place on pictures of different things.
One of several possibilities is a bad memory location in the video ram. It's also possible that something is introducing a non random error in the data from the camera as it is transferred to the PC.
Hi,

I tried 3 different new digital cameras (sanyo, fujitsu siemens and now "BenQ DC C50") and all of them have one or more blue / white dots in their images, if the images are dark (when I look at them on my pc-monitor). In bright images they seems to disappear. The dots are always on the same place. I tried to clean the objective, but it didn't change anything.

Does anybody know the reason?
Is this usually for digital cameras (< 200 EUR)?

Best regards,
v.w.
 
thank you

I just looked for a reason to keep the camera and not to send it back like the other two ;-)
 
Did you try to print? Do you see blue/white dots on the print?

Hi,

I tried 3 different new digital cameras (sanyo, fujitsu siemens and now "BenQ DC C50") and all of them have one or more blue / white dots in their images, if the images are dark (when I look at them on my pc-monitor). In bright images they seems to disappear. The dots are always on the same place. I tried to clean the objective, but it didn't change anything.

Does anybody know the reason?
Is this usually for digital cameras (< 200 EUR)?

Best regards,
v.w.
 
Did you try to print? Do you see blue/white dots on the print?

Hi,

I tried 3 different new digital cameras (sanyo, fujitsu siemens and now "BenQ DC C50") and all of them have one or more blue / white dots in their images, if the images are dark (when I look at them on my pc-monitor). In bright images they seems to disappear. The dots are always on the same place. I tried to clean the objective, but it didn't change anything.

Does anybody know the reason?
Is this usually for digital cameras (< 200 EUR)?

Best regards,
v.w.
 
No, I didn't yet.
But the dots are visible in the JPEG files, when I open them in windows. Image and dots seems to be merged, so the dots would be printed, too, I think.

I've read about the image "noise" by digital cameras "creating" grain in the picture. Maybe this is the reason for the dots.





Did you try to print? Do you see blue/white dots on the print?
 
The reason I asked if you printed, is that you can be looking at images on your screen at a much larger size than if you print a 6 x 4. If you print you may not see so much noise. If noise is a problem, you can remove it with this application available for free:
The download page is http://members.chello.nl/r.kroonenberg2/

However, removing noise from every picture is tedious. You simply need to purchase a better camera if noise is a problem.

No, I didn't yet.
But the dots are visible in the JPEG files, when I open them in windows. Image and dots seems to be merged, so the dots would be printed, too, I think.

I've read about the image "noise" by digital cameras "creating" grain in the picture. Maybe this is the reason for the dots.





Did you try to print? Do you see blue/white dots on the print?
 
A better camera may not be the answer. When a photo taken with a digital camera is at the lower light limit of the sensor, some noise will usually exist in the picture. Cameras may have selectible noise filters that will increase the camera processing time if turned on. The real solution is more light. If the noise occurs in the same place on the display with different cameras (as the user stated), it's not the camera.
The reason I asked if you printed, is that you can be looking at images on your screen at a much larger size than if you print a 6 x 4. If you print you may not see so much noise. If noise is a problem, you can remove it with this application available for free:
The download page is http://members.chello.nl/r.kroonenberg2/

However, removing noise from every picture is tedious. You simply need to purchase a better camera if noise is a problem.

No, I didn't yet.
But the dots are visible in the JPEG files, when I open them in windows. Image and dots seems to be merged, so the dots would be printed, too, I think.

I've read about the image "noise" by digital cameras "creating" grain in the picture. Maybe this is the reason for the dots.





Did you try to print? Do you see blue/white dots on the print?
 
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