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Botrytis cinerea - calibration test please!

Discussion

12 replies
Posted by Andy Astbury on October 19, 2007 at 10:35 AM
Really scraping the bottom of the inspirational barrel now - the only way I could think of getting the biggest number of a single species to rival Toms' Knot shot :biggrin: :biggrin: :biggrin:

Techs - D2Xs+Sig 180mm,ISO 100,1.3sec@f32 PP CS3

But I digress - I've had to get a new machine 'cos t'other one's 'brain' has gone awol. Seeing as the new machine is a twin cpu job I decided to use it for all my image work, and change my original imaging machine to my network pc to rplace the buggered one.

Both machines share one monitor via a switcher, and it's a system that's worked for me for ages, until now :frown:
The new machine is Vista whereas all machines were XPCorpSP2.
Monitor calibration is done as normal via the imaging machine, then the nVidia colour correction util is used on the network machine to bring the output in line with the imaging output.

Both my video cards are giving virtually the same figures:
RGB = 0.14Dab both machines
Colour Temp = 6493K Imaging and 6463K Network
Lum = 89.6 both machines
Black point = 0.24cdm Imaging and 0.23 cdm Network
White point = 91.3 Imaging and 91.0 Network

This finished jpeg image looks superb on the Imaging machine both looks oversharp and too contrasty on the network machine - so can you tell me what it looks like to you 'cos I've spent the last two days trying to sort this out and it's doing my head in :mad: :mad: :mad:

Thanks for the input guys :toast:
Posted by Mike Smith on October 19, 2007 at 11:03 AM
Under earlier MS suites you had to disable Adobe profile manager in the start up routine to prevent it applying the standard Adobe monitor profile at every boot up and you could then load your calibration profile as the default monitor profile - I assume you need to do something similar in Vista? - ie is your new Vista machine over riding the calibrated monitor profile every time you boot up?
Posted by Andy Astbury on October 19, 2007 at 11:34 AM
No Mike it's not - the machine fires up and the Spyder Profile manager loads the new calibration profiles on both machines - not that I ever turn my machines off very much nor my monitor, it's an old CRT (a good one none the less) but from cold it takes about an hour to stabalize at a steady colour temp.

You didn't say what the image looked like your end - unless I get the visual feedback I won't know which machine is giving me the problem :wink:
Posted by Paul Gibbs on October 19, 2007 at 12:45 PM
Looks fine here Andy, my only issue, is that i dont know how it is "supposed" to look?

Interesting image though.
Posted by Mike Smith on October 19, 2007 at 12:48 PM
Looking at the image from an uncalibrated works laptop, it doesn't look over sharpened, the grey and brown tonal ranges look good.

Am I missing something - if the monitor is being physically switched via a switch router between machines, surely the monitor profile changes to each machine in turn as it becomes the "output" source. Why doesn't simply re-profiling each machine via the switcher work now?

Surely Spider profile manager only saves a copy of the updated profile into the default directory as the default profile as a one off event at completion of teh profiling routine - it does not actively manage the profile loading, on earlier versions of MS, the Adobe profile manager would change the default profile on boot up back to the Adobe preset profile, hence it needed removing, I don't have Vista so I don't know how this now behaves, if there is a power down from energy save mode is there a warm reboot effect taking place?
Posted by Paula Graham on October 19, 2007 at 1:08 PM
I do not know either how you expect the shot to look and can only say that the colours look very natural and certainly the shot does not look oversharpened on my calibrated monitor.
Posted by Andy Astbury on October 19, 2007 at 1:51 PM
Mike - by what you've said you have got the idea of my setup right.
Spyder software present on both machines.
Imaging machine is calibrated with it's card output set to factory defaults and the monitor rgb, brightness and contrast controls are used to obtain a profile on that machine.

Spyder is then run on the second machine, but the calibration is obtained by using the video card control panel, which is adjusted to give as near as dammit the same reults - that's why I gave two sets of numbers in my first post :wink:

Adobe profile manager is disabled in config on both systems.

Like I said it's a system thats worked fine for me, just that for some reason this time it's not quite right - the only difference is that this time one machine is a different OS which I can't see should make the slightest difference.

It just seems so odd that the monitor calibrates so closly between the two machines but looks very diffent :frown:

As long as those greys and browns look good your end and the image doesn't look oversharpenned then the image is looking as it should so perhaps my little problem is something I can live with :wink: :wavey:
Posted by Rob Howard on October 19, 2007 at 3:38 PM
Hi Andy,

All looks spot on to me :smile:

Nice shot

Regards

Rob
Posted by Andy Astbury on October 19, 2007 at 6:26 PM
Thanks for the feedback folks :toast: :toast:
Posted by Michael Sayles on October 19, 2007 at 8:32 PM
OK, bucking the trend slightly... parts of it look oversharpened to me. The large leaf in the 'background' looks ok, but the leading edges of the curled leaf look slightly oversharpened to me.
Posted by Philip Kirkham on October 20, 2007 at 7:41 AM
Hello Andy
Colour looks slightly on the blue side to me, but maybe WB was quite cold?
Sharpening looks OK, possibly very slightly too much as Michael states above.
Best wishes
Phil :wavey:
Posted by Justin on October 20, 2007 at 6:14 PM
Hi Andy,

On my CRT monitor your image looks superb. Bitingly sharp and crisp detail but without being over done. Colour temperature looks very cool as you'd likely expect on a shaded woodland floor and suits the scene very well,colours look excellent and very natural.
:cool: :toast:
Posted by Andy Astbury on October 21, 2007 at 4:24 AM
Again, thanks for the FB gents :toast: :toast: