i know i'm a pain
MARK !
Kenneth Waller
http://www.tinyurl.com/272u2f
----- Original Message -----
From: "David J Brooks" <[EMAIL PROTECTED]>
Subject: Re: OT PS question
On Sun, Sep 28, 2008 at 10:56 AM, Godfrey DiGiorgi <[EMAIL PROTECTED]>
wrote:
I would test the theory that the red channel is any different from the
others by shooting a monochrome resolution test chart and then a series
of
targets with red green and blue edges. Examine the results and evaluate
whether there is any truth to this alleged red channel deficiency first.
Another friend is working with the D200 quite a lot ... He does
graphically
inspired abstracts with lots of highly colored subjects ... And I have
seen
no evidence of unsharpness in his captured images.
See, thats just it. For the most part, static images like a head shot
or a flower etc, are ok, in my opinion.
Its just the action, jumping shots that are less than stellar, and i
cannot figure out why.
I sent a few samples to Daev S. some from the D1H and some from the
D200, using same lenses and same subjects, same weather and settings.
I felt the action ones were very soft, Dave thought they all looked
ok, the D1 stuff had more saturation he thought, and thus looked
sharper.
I am trying the various modes in the D200, Vivid, custom etc, and am
trying to see id there is a difference using them,.
I shot some stuff i'll post soon, and maybe that might tell.
Thanks for all the help in this, i know i'm a pain.
Dave
Godfrey - www.gdgphoto.com
On Sep 28, 2008, at 6:08 AM, David J Brooks <[EMAIL PROTECTED]> wrote:
On Sat, Sep 27, 2008 at 10:36 PM, Derby Chang <[EMAIL PROTECTED]>
wrote:
I know you understand what I mean. Dave asked why his red channel
looked
soft. I meant that looking at just one channel after demosaicing was
not
looking at the full resolution of the sensor
It was mentioned to me on my Nikon BB, that the red channel in the
D200 "seems" to be a factor in the preceived softness on the D200
images i get. It was also suggested to go in and sharpen just that
channel, but i see no difference to that channel when i do it, and yes
looks pretty soft.Although in a horse photo, red would be the major
colour, would it not.
I'm just trying to find a work around, instead of trying the D300 or
D700, both of which have much better sharpness ratings, or lets say,
less complqaints.:-)
Dave
I humbly apologise to your Holiness I was not clear.
D
Godfrey DiGiorgi wrote:
Then I don't understand your sentence below. Dave is looking at
individual
channels in RGB which, as you say, will be softer than the full three
channel composite.
At this point in the process, Bayer demosaicing and gamma
interpolation
happened long ago ...
So what does "The Bayer demosaicing will then be trying to interpolate
from what information it has" have to do with the fact stated above?
G
On Sep 27, 2008, at 5:45 PM, Derby Chang wrote:
Yes, that's my point. If you are looking at a predominantly green
image,
the detail is in the green. Looking at the red channel means you are
looking
at rather less resolution than the full RGB image
D
Godfrey DiGiorgi wrote:
When you're looking at an RGB channel file in Photoshop, the Bayer
demosaicing is long past.
Godfrey
On Sep 27, 2008, at 4:37 PM, Derby Chang wrote:
Don't forget, Dave, individual channels will be "softer" than the
full
RGB image, especially if you are looking in one channel and the
most
of the
colours are in the other two. The Bayer demosaicing will then be
trying to
interpolate from what information it has.
D
David J Brooks wrote:
Good, its not my eyes.:-)
I tried adjusting sharpness on that channel but did not see any
change. I;'m sure i;m doing something wrong, or, the photos from
the
D200 ARE really soft.
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