--
Dominic,
--Dominic,
Nice samples, and congrats with your new SD9!
Color accuracy is a relative issue, and it can be very difficult to
judge. One thing's for sure though, the color balance is very good
on most SD9 images. This color balance is "wide" and makes it
possible to make a number of adjustments that will bring the colors
to a more accurate level. For example, the skin tones on your
original image was off by approx 10°, which is typical for the SD9
image.
Geir R
--Dominic,
Nice samples, and congrats with your new SD9!
Color accuracy is a relative issue, and it can be very difficult to
judge. One thing's for sure though, the color balance is very good
on most SD9 images. This color balance is "wide" and makes it
possible to make a number of adjustments that will bring the colors
to a more accurate level. For example, the skin tones on your
original image was off by approx 10°, which is typical for the SD9
image.
Geir R
Ok Dominic, you are probably right. I'm sorry that I have mislead people to believe that the SD9 colors are not accurate. I have removed my miscorrected samples.
--
The latest profile I used was fine tuned more towards the Greg MacBeth color chart (daylight) from IR. It included a red shift adjustment because there was a magenta cast in the red hair. Why I adjusted the red? See below!
I tried your ICC profiles. In Photoshop they only did some extreme adjustments to the levels + some adjustments that appeared to be a white balance correction. It did not correct for the general hue errors that the SD9 images are prone to.
I'm not going to argue about this, because the photographer himself should know the best! As I do not have the SD9 myself, I'm not able to perform extensive tests in order to support my own theories. However, after lots of hours analyzing the colors on the Gretag Macbeth test charts, I'm quite sure how it all connects in general.
Dominic,
--
Hmm.. was it tungsten light? I have had a tough time to get good pictures in tungsten light, and it definately gives more noise than with flash or pure sunlight. And colors are bit difficult in this light, even with manual white balance. However, that is with my Canon S40 - but perhaps this type of light is a bit difficult with the SD9/Foveon as well?
--
--Both shoots are straight out of the Camera, just auto setting of
Photo Pro used and Photoshop to convert to jpeg. No aadditional
corrections. All the Colors (Skin Tones, (red) hair, bricks of the
building) are accurate.
24-70mm/3.5-5.6, ISO 200, 1/250, f9.5
--
http://www.pbase.com/dgross
ICQ UIN: 289647506
--
This is a target image generated on computer screen.
This is a captured image, P and AF mode with 24-70 F2.8 DG/DF
and staturation option +0.5, sharpen +0.5.
You can belive it?
but, It's a basic and critical problem of SD9.
--Both shoots are straight out of the Camera, just auto setting of
Photo Pro used and Photoshop to convert to jpeg. No aadditional
corrections. All the Colors (Skin Tones, (red) hair, bricks of the
building) are accurate.
24-70mm/3.5-5.6, ISO 200, 1/250, f9.5
--
http://www.pbase.com/dgross
ICQ UIN: 289647506
SD9 with 24-70DG2.8
Both shoots are straight out of the Camera, just auto setting of
Photo Pro used and Photoshop to convert to jpeg. No aadditional
corrections. All the Colors (Skin Tones, (red) hair, bricks of the
building) are accurate.
--Both shoots are straight out of the Camera, just auto setting of
Photo Pro used and Photoshop to convert to jpeg. No aadditional
corrections. All the Colors (Skin Tones, (red) hair, bricks of the
building) are accurate.
--Ok,
I can undertand your opinions.
and I have a TRV2000 (sony, 3CCD DV) and I have been test the same
image without trouble.
Color temperature is not same as the target via media such as film,
CCD, CMOS or others.
BUT, I want to say about
(1) Abnormal color changing via intencity
(2) Abnormal gray color changing in high intencity area.
AND, I want to say about
(1) How can understand about the color difference
between low intencity area and high intencity area.
Check this sample image
It's a test pattern to check the color
It's a decompressed raw data.
In this test, can't found the color change. OK?
It's a relative intencity of sensor information with green light
source
It's a relative intencity of sensor information with red light source
It's a relative intencity of sensor information with blue light source
The relative intencity via light level and properties were measured
with the colored light source have no problems.
but, color changing is a problems (be occured by the color
separation process).
Color problems is appreared only in HIGHER light level.
To avoid this problems, Default light level of SD9 is so low.
I am falling in puzzle,
(1) to get the color, I overcome the noise problems
(2) to get the clean image, I overcome the color problems.
27-70mm/2.8, ISO100, 1/10S, F4.0
color temperature of source = 6800k
