I've grabbed a couple of shots from some tv I have on the pvr. They demonstrate the anomalies from uncalibrated settings. However, these are just quite minor colour anomalies, compared to some I've seen.
This is default True Cinema. Note the excess blue. This fellow isn't really purple, but reds get skewed to purple by the presence of excess blue originating from the 10% and below luminance.
After calibration, note how much more natural everything is.
Below 10%, if you put a 5% screen on, the differences are very stark: red gets real low and green is very elevated, with blue sitting somewhere in the middle. You can't calibrate this 5% level and have to get the 10% as close as possible, but that does not solve 5%.
This is why I think Panasonic have tweaked the 20 and 10% part of the gamma - to make it darker, to prevent some of these anomalies being even more troublesome.
The next one is a common one. Some scenes show people's faces and hair in totally different hues if half is in shadow, due to the overwhelming blue at the 10% mark.
However, if you over-correct this, then it can be bluey green instead (the kind of thing you can see in Jaq's hair at the tips to the lower left, but is a lot starker if you don't get the cal right at 10% - and especially if you correct the gamma to 2.4 at this end, which is why I've chosen to recalibrate and leave the 10% gamma at 0). Also note how much blue is added to the greenish interior of the car.
Now after calibration, the hair colour is actually correct and the blue and green artefacts have gone.
Again, the next shot is from a very old video which is naturally ropy and quite greenish, but note in the first image how much the blues and greens are out of line with each other, and the fellow's hair especially returns to a uniform colour without the exaggerated green. Again, this is especially prevalent if you get your 10% gamma and white balance even one or two clicks out in More Detailed adjustment.
I hope it illustrates what I mean when I talk of the blue and green anomalies.
This is default True Cinema. Note the excess blue. This fellow isn't really purple, but reds get skewed to purple by the presence of excess blue originating from the 10% and below luminance.
After calibration, note how much more natural everything is.
Below 10%, if you put a 5% screen on, the differences are very stark: red gets real low and green is very elevated, with blue sitting somewhere in the middle. You can't calibrate this 5% level and have to get the 10% as close as possible, but that does not solve 5%.
This is why I think Panasonic have tweaked the 20 and 10% part of the gamma - to make it darker, to prevent some of these anomalies being even more troublesome.
The next one is a common one. Some scenes show people's faces and hair in totally different hues if half is in shadow, due to the overwhelming blue at the 10% mark.
However, if you over-correct this, then it can be bluey green instead (the kind of thing you can see in Jaq's hair at the tips to the lower left, but is a lot starker if you don't get the cal right at 10% - and especially if you correct the gamma to 2.4 at this end, which is why I've chosen to recalibrate and leave the 10% gamma at 0). Also note how much blue is added to the greenish interior of the car.
Now after calibration, the hair colour is actually correct and the blue and green artefacts have gone.
Again, the next shot is from a very old video which is naturally ropy and quite greenish, but note in the first image how much the blues and greens are out of line with each other, and the fellow's hair especially returns to a uniform colour without the exaggerated green. Again, this is especially prevalent if you get your 10% gamma and white balance even one or two clicks out in More Detailed adjustment.
I hope it illustrates what I mean when I talk of the blue and green anomalies.
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