DrDre said:
it may also indicate the photos are a reasonably good representation of the Technicolor print.
It would (in theory) only indicate that the photos are consistent, and not that the color balance - or anything else for that matter - is right.
However, I disagree that the similarity/difference between your caps and the IB caps would be particularly consistent. Some caps are totally different. But it is to be expected, it's not due to the histogram matching method.
One correction for the whole movie would probably never match the GOUT to an existing print color-wise. And of course, I didn't criticize the experimenting in any way. I've only stated that the photos are not reliable, no matter how much good intent is behind them.