Re: Real world experience w/ GMG and Oris RIPs
Re: Real world experience w/ GMG and Oris RIPs
- Subject: Re: Real world experience w/ GMG and Oris RIPs
- From: Mike Eddington <email@hidden>
- Date: Wed, 24 Nov 2004 21:41:07 -0500 (EST)
- Organization: North American Color, Inc.
Thanks for the reply Graeme. So the issue isn't whether or not we get better results with GMG, but rather whether it is due to the iterative process or some other feature that GMG implements.
> > A profile is not really a curve, it is a mapping in 4D space to 3D (so it
> > could be considered a hyper-surface). So no curve can really show you
> > what's happening between measurement points.
noted...but I can also add fulcrum's to the profile. The CMYK value that is infered is proportional to the values above and below it, wouldn't this indicate that colors between patches are being addressed, or no? Furthermore if a fulcrum is added after the initial profile creation its value is different than if it is added after iterations, so there is some interpolation going on.
> > This is not a valid test. You need to use a verification chart with
> > test points that are unrelated to the IT8 test values used to create
> > the profile.
Ok, that makes sense. Is there an existing chart that you would recommend for this or would a chart, say one that has absolutely no patches that occur in the It8 (or ECI) or would a 7000 patch chart created from MeasureTool Testchart Generator suffice?
If one were to go about this, the test chart would have to be printed off the target device, and then off the proofer using both a GMG iterative profile and a GMG non-iterative profile (both previously created with an It8 ir ECI). Then a target to proof comparison made to verify if there is improvement in measurements of patches of the iterative proof, correct? Anything I'm missing? Of course if the chart did contain patches that occur in the It8 or ECI, then there would definitely be a numerical improvement, if even a slight one.
BTW, I have no idea what voronoi points are. ;-)
mike
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden