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Death of CCD
via Spot on Security
Posted by Doug Marman under VideoIQ
I donít mean to suggest that standard resolution CCD cameras are
going to disappear anytime soon. But the industry reached some
milestones in the advancement of CMOS image technology, and
there seems to be consensus that CMOS imagers can now match even
the low light performance of CCD.
The word Iíve heard from companies who work in the digital
camera world is that as of 2010, all new digital cameras will be
using CMOS imagers. Even in the highest end professional digital
cameras, where quality is of the utmost importance. You wonít
see CCD any more.
Digital cameras and camcorders drive most imager development,
so, this makes 2010 a big watershed year for CMOS imagers.
Where this will have the biggest impact will be in megapixel
cameras, since CMOS has big advantages on faster frame rates of
megapixel images. CCD has always struggled with this.
The other big area is wide dynamic range. Post processing of
CMOS images is the best way of getting ultra wide dynamic range
Ė which provides a significant improvement in video quality,
especially with outdoor scenes.
Another new development that is just starting to show up in very
high-end digital cameras that is worth keeping an eye on, is
post-processing of the image to improve low light performance.
Nikon has a camera, for example, that can now take pictures with
an ASA rating of 3,200.
You canít always believe the ASA rating on digital cameras, but
what Nikon is doing is adding a lot of extra post processing of
each image allowing it to extract the image information out of
the noise, making for much better low-light pictures.
The problem is that today the method they are using takes
seconds to process one image, so it wonít work real time for
video. But Iím sure it is only a matter of time before this can
be done in real time, which will represent a huge advancement
for security applications.
While Iím on this subject, I think it is also worth mentioning
that CMOS imagers also passed another important milestone a few
years ago. Industry experts agree that CMOS imagers have now
passed the resolution and quality of film.