Originally Posted by TimHuey
I like the way you think. It's hard to convince some people that strategy is appropriate in home theater.
Optimally, most accurate calibration is sometimes best, but people way over obsess in this forum about calibration numbers, they aren't even the final determining factor in many cases (see below). I mean they certainly can be in some cases, but depends. I would obsess over gamma and skin tones, that is most important.
Here is my take on calibration...
I'm not a pro calibrator, or even close to it at this point (I had 'ok' old school knowledge, but I'm very outdated now). However, I spent a lot of time remastering static images, about 5 years before I quit. My specific job, was that I wrote my own remastering software in .NET using ImageMagick and other libraries, and what not for the project. We also used other software.
What appears to be a bad calibration that does decent skin tones, can still be ok (hence one that is pretty far off), so it just depends really. What appears to be a good calibration by dE can sometimes be MUCH MUCH worse than it appears on paper due to very small shifts that stack on skin tones to cause issues (sat tracking, color mixing, what not). So it's not always about the exact dE, but it's partly about skin tones and the end resulting contrast achieved. Certain types of color shifts or color mixing can affect skin tones much more severely than other shifts.
As one example that directly applies to projectors, on my old RS-45, I could get the dE very low, but the color still looked worse than a Viewsonic which had a dE well over 5, because of a yellow saturation issue on the JVC. Viewsonic had more severe issues, but the issues blended in with actual content much better. I don't think there is anyone that would pick the JVC color over the Viewsonic, though my Benq did have better color than both, the Viewsonic was still second by a HUGE margin even with a large error. The RS-45 probably has the worst color of any projector I've ever owned, regardless of the dE. It's ok, but it has issues at times.
This wasn't a unique problem to projectors, I found similar things on monitors, TV's, etc... Also, sometimes correcting the final few dE's would just lose all the brightness (as is the case with my JVC - possibly due to current lamp), so totally not worth it in many cases.