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post #1 of 189 Old 12-19-2017, 03:22 PM - Thread Starter
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Lightbulb HDR-10 calibration and test patterns set


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ID:	2334722 Mehanik HDR10 calibration and test patterns set


HDR-10 calibration and test patterns set is designed and created by group of video enthusiasts. Main author of test patterns: mehanik99. Calibration patterns by me.
It's free and provided as is.

Feedback is welcome!

Donwload links:






List of HDR10 video test patterns

00. HDR-10 Calibration Patterns (CalMAN, ChromaPure and HCFR).

01. Black level setup

02. White&Color clipping
2.1. 10% sized windows
2.2. Fake metadata
03. Grayscale
3.1. Grayscale ramps
3.2. Grayscale steps
3.3. 10bit tests
04. Color reproduction
4.1. Color Ramps
4.2. Color Ramps Saturation
4.3. Linearization
4.4. Steps
4.5. Single colors
05. Chroma sharpness
5.1. Chroma sharpness&upsampling tests
5.2. SDR version
06. Aspect Ratio&Sharpness
6.1. Gray field filling
6.2. Pixel field
6.3. Gray field + pixel stripes
07. Frame Rates (including 23.976p) and judder

08. Audio Delay (central channel + 5.1) & Bitstream
8.1. SDR version
09. Test footage: sRGB (SDR) to HDR converted photos

10. ABL&Tonemaping


--
Vladimir

Last edited by M-V; 01-22-2019 at 11:36 AM. Reason: Updated HDR-10 calibration set with patterns for ChromaPure
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post #2 of 189 Old 12-23-2017, 06:40 AM - Thread Starter
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Uploaded patterns set to Google Drive and updated download links in first post:
http://drive.google.com/drive/folde...dFuf8_5nLcRwHA

It's basically same files as on Yandex.Disk but Google Drive may be more convenient in some cases. Be aware that pressing "download all" button takes some time and google splits files into several different zip archives with 2Gb max size (currently - 5). After downloading just unzip all (currently 5) archives into same folder.
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post #3 of 189 Old 12-24-2017, 03:46 AM
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I'm very impressed by the high number of test patterns! Thank you very much!
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post #4 of 189 Old 12-25-2017, 10:06 AM
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Any suggestions, advices, ideas, complaints?

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post #5 of 189 Old 12-25-2017, 04:17 PM
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As someone who is still learning calibration, I appreciate the manual that shows what to look for with some of the patterns as well as "bad" examples. I have a collection of disks (AVS, Ted, Ryan) that have dozens of various patterns and I often don't know what I am supposed to be looking for.

Some guidance for the test footage would also be helpful. I often don't find the test footage that helpful because I don't think I can spot a small error in the red color in a bowl of cherries. ; )

If there were a few examples with guidance that would really help. For example, have an example image for near black with instructions such as "look for the detail on the black button on the jacket" etc. Otherwise, I find myself just flipping through the patterns without much of a clue. ; )

I have seen the website that goes through a few Casino Royale scenes, but I've never seen a more comprehensive post-calibration, color reproduction workflow that would take someone through the 10-15 or so patterns / test footage they should check with guidance around what to look for (both good and bad). It would be great to eventually get to this point.

Thanks much for all the effort. I hope this helps.

Last edited by jwhn; 12-25-2017 at 04:26 PM.
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post #6 of 189 Old 12-26-2017, 01:19 AM
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Quote:
Originally Posted by ultrasilent View Post
Any suggestions, advices, ideas, complaints?
Regarding the 10 bit test pattern: I would exchange the "good" example in the manual, because in fact it shows a bad one and is misleading. MadVR shows a fine smooth ramp with this test pattern and 8 Bit dithering. There is no need to show an "almost correct" one.
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post #7 of 189 Old 12-26-2017, 08:55 AM - Thread Starter
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Quote:
Originally Posted by jwhn View Post
As someone who is still learning calibration, I appreciate the manual that shows what to look for with some of the patterns as well as "bad" examples. I have a collection of disks (AVS, Ted, Ryan) that have dozens of various patterns and I often don't know what I am supposed to be looking for.

Some guidance for the test footage would also be helpful. I often don't find the test footage that helpful because I don't think I can spot a small error in the red color in a bowl of cherries. ; )

If there were a few examples with guidance that would really help. For example, have an example image for near black with instructions such as "look for the detail on the black button on the jacket" etc. Otherwise, I find myself just flipping through the patterns without much of a clue. ; )

I have seen the website that goes through a few Casino Royale scenes, but I've never seen a more comprehensive post-calibration, color reproduction workflow that would take someone through the 10-15 or so patterns / test footage they should check with guidance around what to look for (both good and bad). It would be great to eventually get to this point.

Thanks much for all the effort. I hope this helps.
Makes perfect sense to me and I'd love such a workflow with real content myself!

It's easier to add a description for synthetic tests as they are designed to show specific aspects of the image in the first place. But with real content it's hard to predict what could be broken. I think that obvious rule of thumb is: image shouldn't contain visible artefacts/image flaws: banding, clipping, posterization, etc.
Current version of test footage is based on public photos (in sRGB color space) which were converted to HDR10 format. sRGB originals are in IMG directorys so you can compare two version with each other. Don't expect a perfect match as HDR10 conversion has shifted both luminance and colors and most certainly TV settings/calibration are different but both images at least should look somehow alike.

Quote:
Originally Posted by FoLLgoTT View Post
Regarding the 10 bit test pattern: I would exchange the "good" example in the manual, because in fact it shows a bad one and is misleading. MadVR shows a fine smooth ramp with this test pattern and 8 Bit dithering. There is no need to show an "almost correct" one.
I've already though that this screenshot is not very illustrative. I think that some overexposure could help and make it more clear of what is expected to be seen. Also will add a note about 8bit+dithering.
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post #8 of 189 Old 12-26-2017, 12:17 PM
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Quote:
Originally Posted by M-V View Post
sRGB originals are in IMG directorys so you can compare two version with each other. Don't expect a perfect match as HDR10 conversion has shifted both luminance and colors and most certainly TV settings/calibration are different but both images at least should look somehow alike.
Thanks for your reply. One follow up question:

Based on what you wrote above, it seems as though your images are mainly designed to be compared against SDR versions to ensure they look similar. But wouldn't you want to emphasize examples of HDR that show 1) the wider color gamut of BT.2020 and 2) spectral highlights that would be less pronounced in SDR?

Seems like it would be helpful to have some examples that highlight these two key elements of HDR that make it different than SDR.
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post #9 of 189 Old 12-28-2017, 04:12 AM
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Thanks for this complete work I used to perform calibration of my new Acer VL7860 ... I successfully aligned CMS colors with the specific P3 in BT.2020 files.

Sharpness and other mire are very usefull ... together with "manual"

Sat.
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post #10 of 189 Old 12-28-2017, 06:52 AM - Thread Starter
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Quote:
Originally Posted by jwhn View Post
Thanks for your reply. One follow up question:

Based on what you wrote above, it seems as though your images are mainly designed to be compared against SDR versions to ensure they look similar.
Yes, it's basically SDR photos in HDR mode. They were converted to HDR10 240 nit peak brightness (and one skintone video with 135 nits peak brightness), color coverage (sRGB) didn't change.

Quote:
Originally Posted by jwhn View Post
But wouldn't you want to emphasize examples of HDR that show 1) the wider color gamut of BT.2020 and 2) spectral highlights that would be less pronounced in SDR?

Seems like it would be helpful to have some examples that highlight these two key elements of HDR that make it different than SDR.
True HDR test footage would require not only the footage itself but also HDR grading and mastering which is more of an artists work. However, I think it's an interesting topic and we'll eventually try to create a 'HDR photo'.
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post #11 of 189 Old 12-30-2017, 10:42 AM
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2 days

There are a few questions to one of your team members.
The questions about what he told me in our correspondence.
He needs to apologize.
If he can't, then I start to regret it...
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post #12 of 189 Old 12-30-2017, 11:04 AM
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Quote:
Originally Posted by M-V View Post
Yes, it's basically SDR photos in HDR mode. They were converted to HDR10 240 nit peak brightness (and one skintone video with 135 nits peak brightness), color coverage (sRGB) didn't change.
I actually think that, for visual checking of the HDR calibration, "SDR photo in HDR mode" are more useful than "true HDR photos" as one can more readily do the comparison.
Would it be possible to include a complete set with 135 nits peak brightness? For projectors it's almost impossible to get 240 nits.
Thanks.
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post #13 of 189 Old 01-11-2018, 02:59 PM - Thread Starter
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Quote:
Originally Posted by Dominic Chan View Post
I actually think that, for visual checking of the HDR calibration, "SDR photo in HDR mode" are more useful than "true HDR photos" as one can more readily do the comparison.
Would it be possible to include a complete set with 135 nits peak brightness? For projectors it's almost impossible to get 240 nits.
Thanks.
Hi Dominic,
added one more skintones video with 135 nits peak brightness version - link (original sRGB pictures are in IMG directory).
Unfortunately whole test footage set conversion to 135 nits will require too much effort so not very likely it will be done.

Also I believe that soon we'll add a video with "HDR photos" which will be based on RAW version of photos converted to PQ with peak brightness of 1000 nits.
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Originally Posted by M-V View Post
Hi Dominic,
added one more skintones video with 135 nits peak brightness version - link (original sRGB pictures are in IMG directory).
Unfortunately whole test footage set conversion to 135 nits will require too much effort so not very likely it will be done.
Thank you! The pictures are all I need, as for HDR video I have different EOTF curves that allow me to adjust the overall brightness.
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post #16 of 189 Old 02-12-2018, 01:12 PM - Thread Starter
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Updated HDR10 test footage!
Direct link
(or can be found in 09. Test Footage directory)

Created from RAW photos provided by great website http://www.photographyblog.com/

RAW photos were converted in Photoshop to ST.2084 EOTF with peak highlight luminance 1000 nits.
Also SDR version (video and sRGB jpg files) for comparison.


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post #17 of 189 Old 02-12-2018, 01:49 PM
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Updated HDR10 test footage!
Direct link
(or can be found in 09. Test Footage directory)
Thankyou so much for this!

I do have a question actually. If I wanted to measure colour accuracy in HDR mode I obviously can't use fully saturated colours (100% saturation) since none of us have a panel which can do full BT2020. Also, there's no point trying to measure colours at 100% luminance either because of tone-mapping.

Therefore, with Calman the recommendation is to measure 50% saturation, 50% luminance colours. The question is which (if any) of your colour sets are 50% saturation, 50% luminance? in your section you have "04. Colors\05. Single colors"

but (a) I do not know what percentage luminance each of them are. It's surprisingly difficult to find a PQ lookup table

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post #18 of 189 Old 02-14-2018, 02:46 AM - Thread Starter
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Quote:
Originally Posted by mrtickleuk View Post
Therefore, with Calman the recommendation is to measure 50% saturation, 50% luminance colours. The question is which (if any) of your colour sets are 50% saturation, 50% luminance? in your section you have "04. Colors\05. Single colors"
Slides from "04. Colors\05. Single colors" are not meant to be used in calibration, only for visual examination.

Currently we do have HDR10 grayscale calibration patterns - link
but there are plans to create color saturation patterns for calibration. So stay tuned!

Quote:
Originally Posted by mrtickleuk View Post
but (a) I do not know what percentage luminance each of them are. It's surprisingly difficult to find a PQ lookup table
mehanik is working on such spreadsheet as we speak. It's not ready yet but here is a sneak preview of previous version - link
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post #19 of 189 Old 02-14-2018, 11:24 AM
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Quote:
Originally Posted by M-V View Post
Slides from "04. Colors\05. Single colors" are not meant to be used in calibration, only for visual examination.

Currently we do have HDR10 grayscale calibration patterns - link
but there are plans to create color saturation patterns for calibration. So stay tuned!
Excellent, that's great news, thank-you!

Quote:
Originally Posted by M-V View Post
mehanik is working on such spreadsheet as we speak. It's not ready yet but here is a sneak preview of previous version - link
Again, thanks that looks great

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post #20 of 189 Old 03-12-2018, 11:55 PM
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Thanks so much for this!

I will be using these with HCFR to calibrate my Panasonic OLED (EZ950) with HDR10. Would anyone be able to confirm if all I need are the MaxCLL 1000nit greyscale patterns? I'm not really sure what I am meant to use regarding nits, but I doubt my Panasonic would reach 4000 let alone 10K.

Thanks in advance!
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post #21 of 189 Old 03-13-2018, 05:52 AM - Thread Starter
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Originally Posted by Clemery76 View Post
Thanks so much for this!

I will be using these with HCFR to calibrate my Panasonic OLED (EZ950) with HDR10. Would anyone be able to confirm if all I need are the MaxCLL 1000nit greyscale patterns? I'm not really sure what I am meant to use regarding nits, but I doubt my Panasonic would reach 4000 let alone 10K.

Thanks in advance!
Depending on MaxCLL/MaxFall meta TV could use different tone-mapping algorithms. Check out EZ950 review from hdtvtest, it contains PQ EOTF tracking graphs for different meta. My personal understanding is that as a base calibration starting point it is better to stick with HDR10 meta MaxCLL/MaxFall = 1000/400 as it's more often used in real content.

For CMS/color calibration you'll also need at least color saturation steps and color checker patterns to control your calibration. And, luckily, encoding of our first beta version of HDR10 calibration patterns for HCFR is almost done! I'll post a link in a few hours. For starters it will include: grayscale (10%, 5%, LG OLED 2016 and 2017 steps), near black&white, color primaries (Rec2020 and P3 in Rec2020), saturation 25% steps (Rec2020 and P3 in Rec2020), color checker 'GCD Classic'.
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post #22 of 189 Old 03-13-2018, 02:00 PM - Thread Starter
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Exited to announce our first release of
HDR10 Calibration Patterns

Donwload link: HDR10 calibration patterns (check first post for latest version)

Current version includes patterns for HCFR 3.5.1.4 HDR-10 calibration workflow:
- grayscale (5%, 10%, LG OLED 2016 and 2017 steps)
- primaries and secondaries (Rec2020, P3 in Rec2020, Rec709 in Rec2020)
- near black (0-20%, 2% step)
- near white (96-100%, 2% step)
- color saturation (25% steps, Rec2020, P3 in Rec2020)
- color checker: GCD Classic

Patterns characteristics:
- MaxCLL: 1000 cd/m2
- MaxFALL: 400 cd/m2
- pattern size: 10%.
- duration: 2min (text label stays on screen for 10 seconds)

For combined version of patterns following timing is used: 5 seconds pattern with text label, 6 seconds pattern w/o text label, 4 seconds black screen cooldown.
Feel free to propose your variant of timing - it's quite easy to create custom versions (actually I'm thinking of creating separate directory for several combined versions with different timings).

All patterns are generated fully automatically using configuration text files with RGB codes or xyY coordinates. So it's easy to expand patterns set and create any custom workflows.
Comments and ideas are welcome!

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Last edited by M-V; 04-12-2018 at 01:39 PM.
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post #23 of 189 Old 03-13-2018, 02:23 PM
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Thanks so much! This is very much appreciated! Is it ok to use these patterns with Calman?

What I really need for measuring with Calman is BT.2020 50% saturation, 50% stimulus (about 94 nits) patterns, for RGBCMY.

In the directory "04. Saturation\01. Rec.2020 25% steps", I understand that the files with 50% in the names (eg "19-Rec2020-Yellow-100%.mp4") are 50% saturation, good. But what percentage is the stimulus of these files, please? If they were 50% stimulus, that is perfect. If not, would it be possible to have a set which are 50% stimulus please? (and white? )

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post #24 of 189 Old 03-13-2018, 06:38 PM - Thread Starter
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Quote:
Originally Posted by mrtickleuk View Post
Thanks so much! This is very much appreciated! Is it ok to use these patterns with Calman?

What I really need for measuring with Calman is BT.2020 50% saturation, 50% stimulus (about 94 nits) patterns, for RGBCMY.

In the directory "04. Saturation\01. Rec.2020 25% steps", I understand that the files with 50% in the names (eg "19-Rec2020-Yellow-100%.mp4") are 50% saturation, good. But what percentage is the stimulus of these files, please? If they were 50% stimulus, that is perfect. If not, would it be possible to have a set which are 50% stimulus please? (and white? )
It's 50% Amplitude (94.3 nits white).
E.g. for Rec2020 50% Red xyY target is 0.511320 0.310414 24.309546 (RGB 8 bit PC = 115 82 82)

Can you please post some Calman xyY targets and RGB codes (8 bit PC range)?
Calman version I do have (2016) uses significantly different xyY target for BT.2020 Red 50% Sat 50% Lum = 0,5082 0,3107 40,8259 (RGB 8 bit PC = 128 93 93)
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post #25 of 189 Old 03-13-2018, 06:49 PM
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Quote:
Originally Posted by M-V View Post
Exited to announce our first release of
HDR10 Calibration Patterns

Donwload link: HDR10 calibration patterns 2018-03-13.7z
Thanks so much M-V! Perfect timing, as far as I'm concerned!
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post #26 of 189 Old 03-14-2018, 11:46 AM
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Quote:
Originally Posted by M-V View Post
Depending on MaxCLL/MaxFall meta TV could use different tone-mapping algorithms. Check out EZ950 review from hdtvtest, it contains PQ EOTF tracking graphs for different meta. My personal understanding is that as a base calibration starting point it is better to stick with HDR10 meta MaxCLL/MaxFall = 1000/400 as it's more often used in real content.
+1, Each display is doing different tone mapping according to the movie metadata, some displays don't do anything, some are roll-off sooner when they will see 4000nits (like 2017 LG OLED's), others don't do anything (like 2016 LG OLED's....if you send 1000 or 4000 it makes no difference), others like Panasonic EZ1000 is counting MaxCLL also, but not all values; it's ignoring any MaxCLL below 401nits and above about 5000 nits. LG's 2016/2017 are not affected by changes of MaxCLL/MaxFALL numbers.

There a lot of movies which has MaxCLL & MaxFALL to 0 nits....usually the 20th Century Fox releases, generally about ~30% of the titles of market have zeros to content metadata.

The titles which are using the typical default which BDA (Audio Visual Application Format Specifications for BD-ROM Version 3.1 White Paper) is recommending to be 1000 MaxCLL / 400 MaxFALL for the first 2 years of the format, but only 5 titles from about 360 I have checked have exact that content metadata (1000/400), the most titles have calculated numbers.

For that calculation of Content Metadata (MaxCLL & MaxFALL) you need the RAW 16-TIFF frame master of a movie and the calculation should be performed before encoding to UHD-BD HEVC.

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post #27 of 189 Old 03-14-2018, 12:34 PM
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Originally Posted by M-V View Post
It's 50% Amplitude (94.3 nits white).
E.g. for Rec2020 50% Red xyY target is 0.511320 0.310414 24.309546 (RGB 8 bit PC = 115 82 82)
Fantastic, thankyou! I can't do the calculations.

Quote:
Can you please post some Calman xyY targets and RGB codes (8 bit PC range)?
Calman version I do have (2016) uses significantly different xyY target for BT.2020 Red 50% Sat 50% Lum = 0,5082 0,3107 40,8259 (RGB 8 bit PC = 128 93 93)
Here you are! These are from Calman 2018 v5.9.0.23 (the latest beta). The "Color Management System (CMS) Adjust" page in the HDR10 workflow.

Graphical summary:


Text which is friendly to cut and paste
  • Red x = 0.5077, y = 0.3107, Y = 41.0151. RGB = 126, 96, 96.
  • Green x = 0.2419, y = 0.5613, Y = 70.7105. RGB = 95, 126, 95.
  • Blue x = 0.2227, y = 0.1888, Y = 32.3701. RGB = 101, 101, 126.
  • Cyan x = 0.2286, y = 0.3369, Y = 79.6761. RGB = 107, 126, 126.
  • Magenta x = 0.3399, y = 0.2397, Y = 57.7463. RGB = 126, 108, 126.
  • Yellow x = 0.3792, y = 0.4325, Y = 90.8454. RGB = 126, 126, 105.

If there's anything else you would like please just ask
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post #28 of 189 Old 03-15-2018, 04:14 PM - Thread Starter
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Originally Posted by mrtickleuk View Post
Here you are! These are from Calman 2018 v5.9.0.23 (the latest beta). The "Color Management System (CMS) Adjust" page in the HDR10 workflow.
Here you go: download link (Calman CMS patterns)
Be aware that it's not a final version, just a quick build of CMS.
Added 3 combined versions: 10sec, 15sec and 20 sec. Also added a text label (10% gray) to a black pattern so it should be clear now that the screen is black on purpose.

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Great, thanks, good to know that xyY targets didn't change since 2016. Wonder if 2018 version allows to copy xyY with more than 4 decimal places.
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post #29 of 189 Old 03-15-2018, 05:36 PM
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Originally Posted by M-V View Post
Great, thanks, good to know that xyY targets didn't change since 2016. Wonder if 2018 version allows to copy xyY with more than 4 decimal places.
You can change the number of decimals if you bring the Datagrid Properties of the chart you are looking, and change the default ''4'' number. It will require to have enabled the Design Mode (available in Enthusiast or Ultimate license levels), to give you ''Properties'' when you will right click the Datagrid.



To enable Design Mode, the quick keyboard shortcut is Alt+D.

Another way is to right click the workflow name and enable the design mode from there:

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post #30 of 189 Old 03-15-2018, 11:23 PM
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others don't do anything (like 2016 LG OLED's....if you send 1000 or 4000 it makes no difference
Oh, really? There is some difference with my B6.
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