請介紹校機碟

dominickwok

回復  maygchan

以 download AVSHD 709 PM4 ,用黎校 media player,但又想用番 Blu-ray 碟分開校Blu-ray  ...
ckw1 發表於 2011-9-28 00:58

So you can download the .iso file and burn into a DVD for calibrating the blu-ray player.

maygchan

AVSHD is easier to set not only the Brightness (i.e. black level), but also the Color and Tint bec ...
dominickwok 發表於 2011-9-28 10:24

師兄係味指用colorHFCR check 红綠籃嘅balance?

maygchan

回復 8# ckw1

師兄可以參考吓大師個post
   
http://m.post76.com/discuss/viewthread.php?tid=10165&extra=page%3D1&styleid=63

dominickwok

師兄係味指用colorHFCR check 红綠籃嘅balance?
maygchan 發表於 2011-9-28 10:30

No.  I think what you mean is setting RGB gain/offset to achieve D65 white point for 0% - 100% stimulus levels.  That's the grayscale calibration.

What I mean to calibrate for optimum skin tone (without the need to use the display's Color Management System, if it has one) is to:

(a) Set the "Color" control to make sure, when measuring 100% Saturated Red (@ 75% stimulus level), the Y value is equal to 21% of the Y value of 100% White (@ the same 75% stimulus level) - this is to avoid setting the "Color" control too high and give a general Red push of the colors

(b) Set the "Tint" control to make sure, when measuring 100% Saturated Yellow (@ 75% stimulus level), the Red % and the Green % are equal - optimize for skin tone is the reason of choosing Yellow (not Cyan and Magenta).

I personally tried this on both of my LCD TV and projector - it works.  But you need to first calibrate for D65 white point and 2.2 gamma before this method of setting Color & Tint will give you a very good result.

maygchan

回復 14# dominickwok

受教了，今晚返去再試吓先

小瑟

DVE HD Basics is ok.
Good: It comes with a blue filter to ease the task of adjusting Color & Tint. ...
dominickwok 發表於 2011-9-27 21:55

如果真係想校下畫面, 呢隻夠哂照架勒~~~

chhanthony

HD709-REC色域

White x=0.3127 y=0.329 Y=100%
Red  x=0.640 y=0.330 Y= 0.213 of W
Green x=0.300 y =0.600 Y=0.715 of W
Blue x=0.150 y=0.060 Y=0.072 of W
Yellow x=0.419 y=0.505 Y=0.928 of W
Cyan x=0.225 y=0.329 Y=0.787 of W
Magenta x=0.321 y=0.154 Y=0.285 of W

y=飽和度
x=色調
Y=流明度

chhanthony

xyY嘅重要次序係
Y  x y

dominickwok

White x=0.3127 y=0.329 Y=100%
Red  x=0.640 y=0.330 Y= 0.213 of W
Green x=0.300 y =0.600 Y=0.715 of W
Blue x=0.150 y=0.060 Y=0.072 of W
Yellow x=0.419 y=0.505 Y=0.928 of W
Cyan x=0.225 y=0.329 Y=0.787 of W
Magenta x=0.321 y=0.154 Y=0.285 of W

x=飽和度
y=色調
Y=流明度
chhanthony 發表於 2011-9-28 15:03

I disagree about x=飽和度 and y=色調.

Both x,y together represent the x-y coordinates of a color in the CIE diagram (called it Pt. A)
飽和度 relates to the distance of the Pt. A from the D65 white point (x=0.3127 y=0.329).
色調 relates the angle of Pt. A with respect to the D65 white point.

You change 飽和度 (Saturation) in the display's CMS to move Pt. A outwards or towards D65 (both x & y may be changed).
You change 色調 (Tint) in the display's CMS to rotate it along D65 (also both x & y may be changed).
You change 亮度 (Brightness) in the display's CMS to adjust the Y value.

dominickwok

xyY嘅重要次序係
Y  y x
chhanthony 發表於 2011-9-28 15:07

Agree!

Also, among the primaries, Red is the most important.
And then Green.
And then Blue.