boday 发表于 2017-10-11 02:46
不懂是什么意思的话，要么自己查资料，要么就不要改……
其实那个界面你往下拉一点就有详细的说明，为什么 ...
官方文檔我也看過，嘛.....就是不知道對付一般的藍光動畫用哪一種比較好。（其實就是之前一直是對準srgb的，屏幕也是srgb的，但看番需不需要對準rec709呢，而且最終輸出也是rgb色彩模式吧，所以就有了些疑惑，用來看番校色究竟要對準srgb還是rec709。更進一步說，根據我找到的資料，rec709的色彩範圍（gamut）覆蓋是跟srgb一樣大小，那對準srgb和rec709有分別嗎）而且我校了幾次色，發現我的首要問題是怎麼把我屏幕的灰階過渡調好，不知道為什麼我的屏幕的色帶非常過分地明顯，我就算用curve+matrix都無法消除灰階過渡不自然，快崩潰了
你的文章好像不錯我現在看看，或許能解答我的疑惑{:8_729:}
dtlnor 发表于 2017-10-12 16:27
官方文檔我也看過，嘛.....就是不知道對付一般的藍光動畫用哪一種比較好。（其實就是之前一直是對準srgb ...
>其實就是之前一直是對準srgb的，屏幕也是srgb的，但看番需不需要對準rec709呢，而且最終輸出也是rgb色彩模式吧，所以就有了些疑惑，用來看番校色究竟要對準srgb還是rec709。
你说的是“source colorspace”？顾名思义，指的是片源使用的色彩空间，和你的屏幕是什么没有关系，和最终输出的数据形式是不是 rgb 更没有关系。
几乎所有的各种高清视频，包括普通的 blu-ray（4k uhd bd 除外），都是使用的 rec709 色彩空间。也就是说，目前你会看到的绝大多数视频，都是这个色彩空间。
而事实上，displaycal 这里的片源色彩空间只选一个最常见的即可。因为无论是 rec709 还是 rec2020 等等，都是被定义好了的标准色彩空间，只需要任意其中一个和你屏幕本身的色彩空间的对应关系，都可以以此为基础导出其他的。
>更進一步說，根據我找到的資料，rec709的色彩範圍（gamut）覆蓋是跟srgb一樣大小，那對準srgb和rec709有分別嗎）
没有。另外，displaycal 这里根本没有给你选 srgb 的选项啊……
>而且我校了幾次色，發現我的首要問題是怎麼把我屏幕的灰階過渡調好，不知道為什麼我的屏幕的色帶非常過分地明顯，我就算用curve+matrix都無法消除灰階過渡不自然，快崩潰了
这个我不太好说。建议首先检查是否有其他原因导致了色带，比如显卡驱动更新到最新，检查输出格式是不是 full range rgb。另外测试一下不加载 icc profile 时是否有色带现象，如果不加载 profile 时没有，加载之后就有了，恐怕是显示器本身素质就不是很好。
校色时，calibration 那一栏里的白点（whitepoint）不要指定 6500k，选择 as measured，或许会有改善。
awpak78 发表于 2017-10-12 11:37
明白了，但我还是觉得勾上vcgt，6bit破屏幕还是把抖动映射输出一条龙服务都交给madvr更好。
...
有一点我觉得有必要提及，就是如果开启 vcgt 的话，启动 madVR 后 displayCal 的 ProfileLoader 会自动停止加载校色，导致除播放窗口外的其它界面均复原为未校色状态，这对于多屏幕用户或者想一边看片一边做其他事情的人来讲是非常糟糕的体验。这种时候就需要取消 vcgt，这样 madVR 运行时其它窗口的屏幕依然能够保持基本的校色。
顺便感谢 boday 大姐姐关于这一点设置上的指导。
dtlnor 发表于 2017-10-12 16:27
官方文檔我也看過，嘛.....就是不知道對付一般的藍光動畫用哪一種比較好。（其實就是之前一直是對準srgb ...
色带过于明显的话，在Profile Information里看看灰阶数是不是被砍得太厉害了。
对于可调RGB分量的桌面显示器一定把白点调准再开始校准
boday 发表于 2017-10-13 05:13
>其實就是之前一直是對準srgb的，屏幕也是srgb的，但看番需不需要對準rec709呢，而且最終輸出也是rgb色彩 ...
原來如此，了解了。灰階那裡，無論我校色前後還是是否apply icc都是明顯的能留意到，不知道為什麼。白點native 6800k左右，我一直用的as measure。屏幕是1k5買來的benq ew2755zh, 主要買來的時候是打算隨便買一個接近100%rgb的屏幕過渡一下的。結果沒想到色帶那麼明顯。一開始還以為是madvr設置出了問題呢，結果是現在6bit的筆記本tn屏的灰階過渡更加自然這個結果有點接受不了{:6_387:}
本帖最后由 dtlnor 于 2017-10-13 22:52 编辑
awpak78 发表于 2017-10-13 11:27
色带过于明显的话，在Profile Information里看看灰阶数是不是被砍得太厉害了。
对于可调RGB分量的桌面显 ...我的屏幕OSD只能調亮度。rgb調不了。能調對比度 black level什麼的。但我想應該不用碰這些
要怎麼看profile呢...是哪一項？Size 530680 Bytes (518.24 KiB)
Preferred CMM 0x6172676C 'argl' ArgyllCMS
ICC version 2.2
Profile class Display device profile
Color model RGB
Profile connection space (PCS) XYZ
Created 2017-10-11 00:11:50
Platform Microsoft
Is embedded No
Can be used independently Yes
Device
Manufacturer 0x0000D109
Model 0x00007940
Attributes Reflective
Glossy
Positive
Color
Default rendering intent Perceptual
PCS illuminant XYZ 96.42 100.0082.49 (xy 0.3457 0.3585, CCT 5000K)
Creator 0x6172676C 'argl' ArgyllCMS
Checksum 0x61BA0E369E5CBDCDF60F1AC7B27A52FB
Checksum OK Yes
Description (ASCII) EW2755ZH #1 2017-10-10 20-42 2.2 S XYZLUT+MTX
Copyright No copyright. Created with DisplayCAL 3.3.4.0 and
ArgyllCMS 1.9.2
Device model name (ASCII) BenQ EW2755ZH
Luminance 121.85 cd/m²
Media white point
Is illuminant Yes
Illuminant-relative XYZ 96.16 100.00 114.67 (xy 0.3094 0.3217)
Illuminant-relative CCT 6757K
ΔE 2000 to daylight locus 1.83
ΔE 2000 to blackbody locus 0.92
Media black point
Illuminant-relative XYZ 0.2808 0.2930 0.3357 (xy 0.3087 0.3221)
Illuminant-relative CCT 6790K
ΔE 2000 to daylight locus 1.34
ΔE 2000 to blackbody locus 1.37
Colorants (PCS-relative)
Red XYZ 42.5421.40 0.97 (xy 0.6554 0.3296)
Green XYZ 39.5472.04 7.64 (xy 0.3317 0.6042)
Blue XYZ 14.24 6.5073.93 (xy 0.1504 0.0687)
Video card gamma table
Bitdepth 16
Channels 3
Number of entries per channel 256
Channel 1 gamma at 50% input 1.34
Channel 1 minimum 0.0000%
Channel 1 maximum 100.00%
Channel 1 unique values 256 @ 8 Bit
Channel 1 is linear No
Channel 2 gamma at 50% input 1.34
Channel 2 minimum 0.0000%
Channel 2 maximum 100.00%
Channel 2 unique values 256 @ 8 Bit
Channel 2 is linear No
Channel 3 gamma at 50% input 1.35
Channel 3 minimum 0.0000%
Channel 3 maximum 100.00%
Channel 3 unique values 256 @ 8 Bit
Channel 3 is linear No
Device to PCS: Intent 0
Matrix 1.0000 0.0000 0.0000
0.0000 1.0000 0.0000
0.0000 0.0000 1.0000
Input Table
Channels 3
Number of entries per channel 2048
Color Look Up Table
Grid Steps 33
Entries 35937
Output Table
Channels 3
Number of entries per channel 2048
PCS to device: Intent 0
Matrix 6.2684 -3.2345 -0.9814
-1.9576 3.8323 0.0669
0.1440 -0.4580 2.8114
Input Table
Channels 3
Number of entries per channel 2048
Color Look Up Table
Grid Steps 17
Entries 4913
Output Table
Channels 3
Number of entries per channel 2048
Red matrix column
Illuminant-relative XYZ 40.6220.52 1.24 (xy 0.6512 0.3290)
PCS-relative XYZ 42.9321.51 0.81 (xy 0.6580 0.3297)
Green matrix column
Illuminant-relative XYZ 37.0572.04 9.25 (xy 0.3131 0.6088)
PCS-relative XYZ 39.8572.56 7.49 (xy 0.3324 0.6052)
Blue matrix column
Illuminant-relative XYZ 18.49 7.44 104.19 (xy 0.1421 0.0572)
PCS-relative XYZ 13.64 5.9474.19 (xy 0.1455 0.0633)
Red tone response curve
Number of entries 256
Transfer function ≈ Gamma 2.74 100% (Δ 1.22%)
Minimum Y 0.0000
Maximum Y 99.99
Green tone response curve
Number of entries 256
Transfer function ≈ Gamma 2.74 100% (Δ 1.52%)
Minimum Y 0.0000
Maximum Y 100.00
Blue tone response curve
Number of entries 256
Transfer function ≈ Gamma 2.73 100% (Δ 1.76%)
Minimum Y 0.0000
Maximum Y 100.00
Characterization target
Characterization device values
Characterization measurement values
Absolute to media relative transform Bradford
Matrix 0.8951 0.2664 -0.1614
-0.7502 1.7135 0.0367
0.0389 -0.0685 1.0296
PCS to device: Intent 1
Matrix 6.2222 -3.2774 -0.8752
-1.8252 3.7097 0.0608
0.1375 -0.3097 2.6392
Input Table
Channels 3
Number of entries per channel 4096
Color Look Up Table
Grid Steps 17
Entries 4913
Output Table
Channels 3
Number of entries per channel 256
PCS to device: Intent 2
Matrix 6.2684 -3.2345 -0.9814
-1.9576 3.8323 0.0669
0.1440 -0.4580 2.8114
Input Table
Channels 3
Number of entries per channel 2048
Color Look Up Table
Grid Steps 17
Entries 4913
Output Table
Channels 3
Number of entries per channel 2048
Device to PCS: Intent 1
Matrix 1.0000 0.0000 0.0000
0.0000 1.0000 0.0000
0.0000 0.0000 1.0000
Input Table
Channels 3
Number of entries per channel 2048
Color Look Up Table
Grid Steps 33
Entries 35937
Output Table
Channels 3
Number of entries per channel 2048
Device to PCS: Intent 2
Matrix 1.0000 0.0000 0.0000
0.0000 1.0000 0.0000
0.0000 0.0000 1.0000
Input Table
Channels 3
Number of entries per channel 2048
Color Look Up Table
Grid Steps 33
Entries 35937
Output Table
Channels 3
Number of entries per channel 2048
Chromaticity (illuminant-relative)
Channel 1 (R) xy 0.6474 0.3290
Channel 2 (G) xy 0.3126 0.6069
Channel 3 (B) xy 0.1456 0.0612
Make and model
Manufacturer 0x09D1
Model 0x7940
Metadata
prefix EDID_
CMF_
DATA_
MEASUREMENT_
OPENICC_
MAPPING_
ACCURACY_
GAMUT_
EDID_mnft BNQ
EDID_mnft_id 2513
EDID_model_id 31040
EDID_date 2017-T20
EDID_red_x 0.64453125
EDID_red_y 0.330078125
EDID_green_x 0.3154296875
EDID_green_y 0.6201171875
EDID_blue_x 0.154296875
EDID_blue_y 0.064453125
EDID_white_x 0.3134765625
EDID_white_y 0.3291015625
EDID_gamma 2.2
EDID_model BenQ EW2755ZH
EDID_serial Z5H00861CL0
EDID_md5 407c5b428043be5c79c8d3b6db896710
CMF_binary DisplayCAL
CMF_version 3.3.4.0
CMF_product DisplayCAL
License Public Domain
Quality high
OPENICC_automatic_generated 0
DATA_source calib
MEASUREMENT_device i1 displaypro, colormunki display
MAPPING_device_id xrandr-BenQ EW2755ZH-Z5H00861CL0
ACCURACY_dE76_avg 0.403671
ACCURACY_dE76_max 12.328300
ACCURACY_dE76_rms 0.530245
GAMUT_volume 1.02184621496
GAMUT_coverage(srgb) 0.9669
GAMUT_coverage(dci-p3) 0.7224
GAMUT_coverage(adobe-rgb) 0.6958
dtlnor 发表于 2017-10-13 22:49
我的屏幕OSD只能調亮度。rgb調不了。能調對比度 black level什麼的。但我想應該不用碰這些
要怎麼看profile ...
看窗口下方红框处的校准后有效灰阶，如果只有70%这样的话，色带就无法避免了。
一般来说对于本身色温偏离比较厉害的低端TN屏，暴力校准白平衡后剩下的灰阶都会很糟糕。
boday 发表于 2017-10-12 02:04
前一个问题看我那帖里的 177 楼回帖。至于说什么是 vcgt，我在那帖里解释过应该不止一次，爬爬楼应该能看 ...
{:4_678:}可以再请教大佬两个问题吗？
在DisplayCAL的“校准”页里选择Gamma2.2和sRGB有什么区别？我在官方论坛上也找了下没有找到很好的答案，最近我都是设置的sRGB。对于我的破屏幕也没有看出校准曲线有什么肉眼可见的区别。
另外一个问题是Windows系统界面只管伽马表不管LUT，那么AdobeRGB的笔记本屏幕怎么样才能在系统界面不过饱和呢？我给学设计的基友校准后色温好评（低端TN屏幕本身白平衡很糟糕），但没过两天就开始抱怨偏红（对可以LUT的PS就没有问题），我暂时让他忍着好好用Ps去了。Surface Studio连DCI-P3都支持了，有没有办法解决AdobeRGB屏幕过饱和的问题呢？
awpak78 发表于 2017-10-14 00:56
看窗口下方红框处的校准后有效灰阶，如果只有70%这样的话，色带就无法避免了。
一般来说对于本身色温偏 ...
https://puu.sh/xXlji/42b16e9599.png
我是這樣的{:8_742:}
本帖最后由 dtlnor 于 2017-10-14 03:36 编辑
awpak78 发表于 2017-10-14 01:10
可以再请教大佬两个问题吗？
在DisplayCAL的“校准”页里选择Gamma2.2和sRGB有什么区别？我在 ...
Tone curve / gamma
The target response curve is normally an exponential curve (output = inputgamma), and defaults to 2.2 (which is close to a typical CRT displays real response). Four pre-defined curves can be used as well: the sRGB colorspace response curve, which is an exponent curve with a straight segment at the dark end and an overall response of approximately gamma 2.2, the L* curve, which is the response of the CIE L*a*b* perceptual colorspace, the Rec. 709 video standard response curve and the SMPTE 240M video standard response curve.
Another possible choice is “As measured”, which will skip video card gamma table (1D LUT) calibration.
Note that a real display usually can't reproduce any of the ideal pre-defined curves, since it will have a non-zero black point, whereas all the ideal curves assume zero light at zero input.
For gamma values, you can also specify whether it should be interpreted relative, meaning the gamma value provided is used to set an actual response curve in light of the non-zero black of the actual display that has the same relative output at 50% input as the ideal gamma power curve, or absolute, which allows the actual power to be specified instead, meaning that after the actual displays non-zero black is accounted for, the response at 50% input will probably not match that of the ideal power curve with that gamma value (to see this setting, you have to go into the “Options” menu, and enable “Show advanced options”).
To allow for the non-zero black level of a real display, by default the target curve values will be offset so that zero input gives the actual black level of the display (output offset). This ensures that the target curve better corresponds to the typical natural behavior of displays, but it may not be the most visually even progression from display minimum. This behavior can be changed using the black output offset option (see further below).
Also note that many color spaces are encoded with, and labelled as having a gamma of approximately 2.2 (ie. sRGB, REC 709, SMPTE 240M, Macintosh OS X 10.6), but are actually intended to be displayed on a display with a typical CRT gamma of 2.4 viewed in a darkened environment.
This is because this 2.2 gamma is a source gamma encoding in bright viewing conditions such as a television studio, while typical display viewing conditions are quite dark by comparison, and a contrast expansion of (approx.) gamma 1.1 is desirable to make the images look as intended.
So if you are displaying images encoded to the sRGB standard, or displaying video through the calibration, just setting the gamma curve to sRGB or REC 709 (respectively) is probably not what you want! What you probably want to do, is to set the gamma curve to about gamma 2.4, so that the contrast range is expanded appropriately, or alternatively use sRGB or REC 709 or a gamma of 2.2 but also specify the actual ambient viewing conditions via a light level in Lux, so that an appropriate contrast enhancement can be made during calibration. If your instrument is capable of measuring ambient light levels, then you can do so.
(For in-depth technical information about sRGB, see “A Standard Default Color Space for the Internet: sRGB” at the ICC website for details of how it is intended to be used)
If you're wondering what gamma value you should use, you can run “Report on uncalibrated display device” from the “Tools” menu to measure the approximated overall gamma among other info. Setting the gamma to the reported value can then help to reduce calibration artifacts like banding, because the adjustments needed for the video card's gamma table should not be as strong as if a gamma further away from the display's native response was chosen.
或許官方文檔對你有幫助？
如果我的英文閱讀理解不錯的話，應該是說srgb的curve在接近黑色的一端的線段是直線，但整體與gamma2.2的指數曲線差不多，大概這就是兩者調完看起來也沒什麼分別的原因把