Message
Re: [colorvision_group] Re: PFP Suite with Fuji Frontier F340
2006-04-26 by CDTobie@aol.com
In a message dated 4/25/06 8:50:52 PM, hanson102@... writes:
When I compared the 3 images on the images on screen, the on screen
images still was as reddish as before.
This description does not say anything about the print output: does that look right? Are grays neutral, and skintones good? If so, then you may have either a monitor, or a viewing conditions issue, though photo output is far less prone to viewing conditions issues than inkjet.
QUESTIONS:
1. Why is this so? I doubt I have done anything wrong here, which
makes me wonder why both image on monitor and print doesn't match at all.
The secret of ICC color management is that it doesn't link your print to your monitor. It simply corrects both, and as corrected images, they should be quite close to one another. As a test, you should go to Custom Proof Setup in Photoshop, select your Frontier profile, and see if the result now looks more like your prints. I wouldn't expect it to, as viewing right from sRGB or AdobeRGB should produce a neutral image, as should your printer profile, in proof or in print.
2. This is so true even when i was reading the color patches with the
spectro. I noticed that the color read by the spectro doesn't look
the way it should be on the monitor compared to the print. Is this
just natural?
Patches displayed on screen from the spectro are not fully color managed, they are just there to indicate the general color involved...
3. Is there something wrong with how the spectro is reading the colors
which is causing this problem?
It doesn't sound like it. If you have a Kodak GrayScale, a ColorChecker, or a simple gray card, you can test this by measuring a medium gray patch with the Spectro's spot measure function, create an RGB color with the same Lab values, and filling a selection in the PDI test image with that gray. It should print about as neutral as it went in. Does it look neutral on the monitor? If it looks pinkish on screen, but prints neutral, then its the monitor side of things. If it looks neutral on screen, but prints with a Cyan tint, then it may be your printer profile process, or components of it.
4. If my procedure is correct, how can I compensate for the
reddishness of the images on screen? There is nothing wrong with the
monitor but the image itself when assigned with the created profile
turns reddish compared to print.
Ahhh... so the image is not reddish in AdobeRGB, only with the print profile proofed or assigned? Thats different. Do the test above, to seperate the spectro's readings from the profiling process. My bet is that the device can read neutrals neutrally... and that the issue is somewhere in the process, not the hardware.
5. Is compensation done when building the profile - adjustment of CMY,
Brightness Contrast Saturation in the Build Profile Setup Window? Or
is compensation done on the FRONTIER machine? which is the proper way?
Correct your Frontier as best you can BEFORE beginning the profiling process. Then avoid using the sliders in PrintFIX PRO to try to compensate for errors in the process; they are for small adjustments, not for fixing big problems caused elsewhere.
C. David Tobie
Product Technology Manager
ColorVision Business Unit
Datacolor Inc.
CDTobie@colorvision.com
www.colorvision.com