ninelives
Senior Member
I found an interesting article.
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Image production by the DiMAGE 7i is focused on being faithful
to producing the appearance and texture description of the
subject; they have been designed so as not to offer excessive
processing on the camera side, including noise reduction,
against image information from CCD.
As you may know, noise reduction function is necessary since
there cannot be noise-free condition when the image is captured
through CCD. In the meantime, the camera itself cannot
distinguish 'noise' from 'precise information' which is often
important to express texture of the image; excessive noise
reduction may reduce 'precise information', which may ruin the
texture of the image depending on the recording condition such
as subjects, weather, brightness, shutter speed, etc.
For instance of the subject, plain and/or smooth subjects such
as doll's face, walls, and blue sky would have little demerit
on excessive noise reduction, meanwhile, complicated and/or
precise subjects with concavity and convexity in the subject
itself, such as feathers, wrinkles, people and animals, would
have more demerit on being ruined the texture of the image than
the merit on noise reduction.
The DiMAGE 7i, therefore, apply to the noise reduction level to
prevent the soaring of captured image.
On the other hand, it is related to viewing condition as well
as recording condition whether the noise is distinctive or not.
To view the captured image itself, there are such conditions as
printing out or displaying the whole image on the monitor,
meanwhile, we regard that it is not 'viewing the captured image
itself' but 'reproduction of captured image' by way of
retouching, that viewing 5M-pixel image on the monitor with
magnification of 100% or more.
It is true that there are some noises left in the image
captured by the DiMAGE 7i when you view with magnification of
100% or more on the monitor, in the meantime, we would greatly
appreciate it if you would understand that the DiMAGE 7i are
predetermined its noise reduction level aiming at enhancing
texture and spatial effect of the captured image rather than
the noises left, when you view the image by printed one or the
whole image on the monitor.
--------------
read more about it here
--------------
Image production by the DiMAGE 7i is focused on being faithful
to producing the appearance and texture description of the
subject; they have been designed so as not to offer excessive
processing on the camera side, including noise reduction,
against image information from CCD.
As you may know, noise reduction function is necessary since
there cannot be noise-free condition when the image is captured
through CCD. In the meantime, the camera itself cannot
distinguish 'noise' from 'precise information' which is often
important to express texture of the image; excessive noise
reduction may reduce 'precise information', which may ruin the
texture of the image depending on the recording condition such
as subjects, weather, brightness, shutter speed, etc.
For instance of the subject, plain and/or smooth subjects such
as doll's face, walls, and blue sky would have little demerit
on excessive noise reduction, meanwhile, complicated and/or
precise subjects with concavity and convexity in the subject
itself, such as feathers, wrinkles, people and animals, would
have more demerit on being ruined the texture of the image than
the merit on noise reduction.
The DiMAGE 7i, therefore, apply to the noise reduction level to
prevent the soaring of captured image.
On the other hand, it is related to viewing condition as well
as recording condition whether the noise is distinctive or not.
To view the captured image itself, there are such conditions as
printing out or displaying the whole image on the monitor,
meanwhile, we regard that it is not 'viewing the captured image
itself' but 'reproduction of captured image' by way of
retouching, that viewing 5M-pixel image on the monitor with
magnification of 100% or more.
It is true that there are some noises left in the image
captured by the DiMAGE 7i when you view with magnification of
100% or more on the monitor, in the meantime, we would greatly
appreciate it if you would understand that the DiMAGE 7i are
predetermined its noise reduction level aiming at enhancing
texture and spatial effect of the captured image rather than
the noises left, when you view the image by printed one or the
whole image on the monitor.
--------------
read more about it here
