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Quick high level question... before more deeper questions.

For 4k BT2020 (which is inherently not HDR, apparently you formally need to say BT.2100 for HDR but most people just go with BT2020 HDR?), the same gamma curve as rec.709 is used.

However, on my RS500 when BT.2020 is selected I no longer get 2.2 / 2.3 / 2.4 gamma options. Instead of I get normal a, b, c, d. I'm certainly familiar with D, so let's ignore that.

Is "normal" the standard defined BT2020 gamma for JVC?

Thanks
 

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Quick high level question... before more deeper questions.

For 4k BT2020 (which is inherently not HDR, apparently you formally need to say BT.2100 for HDR but most people just go with BT2020 HDR?), the same gamma curve as rec.709 is used.

However, on my RS500 when BT.2020 is selected I no longer get 2.2 / 2.3 / 2.4 gamma options. Instead of I get normal a, b, c, d. I'm certainly familiar with D, so let's ignore that.

Is "normal" the standard defined BT2020 gamma for JVC?

Thanks
JVC projectors use “BT.2020” to refer to the colour profile (chromaticity) only. The EOTF/Gamma is specified independently.
Normal is the same as Gamma 2.2.
 

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I just realized I don't have any windows machines in the house any longer.

To check whether I should go buy a vm program, to run autocal on my macbook, to address any gamma droop I have, using autocal, I should be able to reliably measure the gamma using HCFR on my mac, right?

And that measurement will give me a good sense of whether I have a gamma droop that needs to be addressed, right?
 

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I just realized I don't have any windows machines in the house any longer.

To check whether I should go buy a vm program, to run autocal on my macbook, to address any gamma droop I have, using autocal, I should be able to reliably measure the gamma using HCFR on my mac, right?

And that measurement will give me a good sense of whether I have a gamma droop that needs to be addressed, right?
HCFR on Mac is really old. Not sure what meters it supports.
 

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I think it works with my XRITE Color MUNKI Display.

I haven't tried it with the Sypder 5 because I think the MUNKI is likely more accurate.
I think it only supports Spyder 2, Spyder 3, and the home-brew HCFR probe.
 

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Calibration Sensor Confusion. Hi, gentlemen (and ladies). I'm calibrating my x790r after replacing the bulb and burning in for about 70 hours. I'm a bit confused about the placement of the sensor (Spyder 5). Autocal software is V10. In the past, the instructions were to place the sensor about 1 foot away from the screen with the sensor aimed at the screen. In doing so, the sensor would show up near the left hand edge of the autocal "box". V10 of the Autocal software tells me to place the Spyder 5 so that the sensor faces the Projector. Yet the screen image seems to show the sensor (the wide part with the 'grill') facing the screen. I ran the calibration for HDR (with the sensor facing the projector as instructed by the text), both Gamma and Color, and the image looks good. Am I missing something?
JVC Calibration Sensor Setting 1 12-20-20.png
 

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Calibration Sensor Confusion. Hi, gentlemen (and ladies). I'm calibrating my x790r after replacing the bulb and burning in for about 70 hours. I'm a bit confused about the placement of the sensor (Spyder 5). Autocal software is V10. In the past, the instructions were to place the sensor about 1 foot away from the screen with the sensor aimed at the screen. In doing so, the sensor would show up near the left hand edge of the autocal "box". V10 of the Autocal software tells me to place the Spyder 5 so that the sensor faces the Projector. Yet the screen image seems to show the sensor (the wide part with the 'grill') facing the screen. I ran the calibration for HDR (with the sensor facing the projector as instructed by the text), both Gamma and Color, and the image looks good. Am I missing something? View attachment 3069257
All versions of Autocal (7-10) using Spyder5 have it face the projector. The SpyderX and i1Pro2 face the screen.
 

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All versions of Autocal (7-10) using Spyder5 have it face the projector. The SpyderX and i1Pro2 face the screen.
Thank you, Dominic. I figured you'd have an answer 😉 Mele Kalikimaka
 

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Calibration Sensor Confusion. Hi, gentlemen (and ladies). I'm calibrating my x790r after replacing the bulb and burning in for about 70 hours. I'm a bit confused about the placement of the sensor (Spyder 5). Autocal software is V10. In the past, the instructions were to place the sensor about 1 foot away from the screen with the sensor aimed at the screen. In doing so, the sensor would show up near the left hand edge of the autocal "box". V10 of the Autocal software tells me to place the Spyder 5 so that the sensor faces the Projector. Yet the screen image seems to show the sensor (the wide part with the 'grill') facing the screen. I ran the calibration for HDR (with the sensor facing the projector as instructed by the text), both Gamma and Color, and the image looks good. Am I missing something?
Yeah after a very long gap between calibrations and setting up the iPro instead of the spyder I was confused too but just used it facing hte screen and ended up with a much better result then facing the lens.
 

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Hi, I calibrated my RS400 yesterday, with a datacolor spyder 5.
first for regular blu ray material
(rec 709NF, gamma normal, iris 0, -5, -10, -15, cmd = off)
much better image now and colors also come across much better.
Then tried to perform a calibration for SDR - HDR 4k uhd material.
(rec 2020NF, gamma normal, irirs 0, -5, -10, -15, cmd = off)
when checked, the colors turn out to be completely wrong. red = orange, blue = purple?
can someone help me with what went wrong?
incorrect settings?
As source use is APTV4 and panasonic UB9000 via vertex2
just HDR profile all on (11) and sometimes sony lldv bt2020 profile.

Thanks for the help
 

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Hi, I calibrated my RS400 yesterday, with a datacolor spyder 5.
first for regular blu ray material
(rec 709NF, gamma normal, iris 0, -5, -10, -15, cmd = off)
much better image now and colors also come across much better.
Then tried to perform a calibration for SDR - HDR 4k uhd material.
(rec 2020NF, gamma normal, irirs 0, -5, -10, -15, cmd = off)
when checked, the colors turn out to be completely wrong. red = orange, blue = purple?
can someone help me with what went wrong?
incorrect settings?
As source use is APTV4 and panasonic UB9000 via vertex2
just HDR profile all on (11) and sometimes sony lldv bt2020 profile.

Thanks for the help
You cannot calibrate both 709NF and 2020NF unless the lamp power setting is different; otherwise the second calibration will over-write the first.
As for the wrong colours, you need to post the calibration log to see what the issue is.
 

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Hi Dominic,

so i need to calibrate 709NF in low lamp mode and 2020NF in high lamp mode?
Can't i store 709nf to user 1 in low lamp and 2020nf to user 2 in low lamp.
i am not home right now will post the log files later?

thanks
 

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Hi Dominic,

so i need to calibrate 709NF in low lamp mode and 2020NF in high lamp mode?
Can't i store 709nf to user 1 in low lamp and 2020nf to user 2 in low lamp.
i am not home right now will post the log files later?

thanks
You don’t “need to” calibrate both 709NF and 2020NF in low lamp, as calibrate one will automatically calibrate the other.
 

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OK,

Thanks for the info, so probably something wrong happened with import of gamma curves in user 1, 2, 3
have to check this evening.
take your javs balck compensated JVC curves , and 1 lldv curve
 

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For all the Mac users out there, I wanted to share an approach to getting Arve's tool running with plotting. It seems the current version of python-tk on the Mac is broken with the latest Big Sur update. To be clear, Arve's tool works just fine -- as long as you don't want to plot anything. If you want to plot and see what the curve really looks like, read on.

Basically I've got a dockerfile that creates an Ubuntu 18 instance, installs Arve's tool from GitHub and then runs it. The plots appear on your Mac using XQuartz.

Without going into the nitty gritty, here's what you need to do

1) This only works if you have Docker installed.
2) Install XQuartz on your Mac if it isn't installed already. This is an X11 server. You can find it here XQuartz
3) After it's installed, launch it, go to preferences, then security, disable "authenticate connections" and check "Allow connections from network clients".
4) Create a folder somewhere. This folder is where your Arve's Tool install will exist. This is also where you'll place any curves you create.
5) Copy the dockerfile (attached below) in that directory. The Forum wouldn't allow me to upload it, so it's just pasted at the bottom.
6) cd into that directory. If you haven't realized it yet, this requires you have familiarity with Terminal.
7) Build the container using "docker build . -t jvc:v1"
8) Run the container using "docker run -v $(pwd):/local -it -t jvc:v1"
9) You will then see the Arve Tool menu. Use the tool as normal. If you want to test plotting, type "ga" and then type "p"


Here's an example. As a starting point, I've already created a directory called "arve", I've placed the dockerfile in it along with javs 4000 curve.

$ docker build . -t jvc:v1
[+] Building 53.0s (16/16) FINISHED
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 538B 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load metadata for docker.io/library/ubuntu:18.04 1.2s
=> [ 1/12] FROM docker.io/library/ubuntu:[email protected]:fd25e706f3dea2a5ff705dbc3353cf37f08307798f3e360a13e9385840f73fb3 1.7s
=> => resolve docker.io/library/ubuntu:[email protected]:fd25e706f3dea2a5ff705dbc3353cf37f08307798f3e360a13e9385840f73fb3 0.0s
=> => sha256:f22ccc0b8772d8e1bcb40f137b373686bc27427a70c0e41dd22b38016e09e7e0 26.71MB / 26.71MB 0.7s
=> => sha256:3cf8fb62ba5ffb221a2edb2208741346eb4d2d99a174138e4afbb69ce1fd9966 850B / 850B 0.2s
=> => sha256:e80c964ece6a3edf0db1cfc72ae0e6f0699fb776bbfcc92b708fbb945b0b9547 162B / 162B 0.2s
=> => sha256:fd25e706f3dea2a5ff705dbc3353cf37f08307798f3e360a13e9385840f73fb3 1.41kB / 1.41kB 0.0s
=> => sha256:a7fa45fb43d471f4e66c5b53b1b9b0e02f7f1d37a889a41bbe1601fac70cb54e 943B / 943B 0.0s
=> => sha256:2c047404e52d7f17bdac4121a13cd844447b74e13063f8cb8f8b314467feed06 3.32kB / 3.32kB 0.0s
=> => extracting sha256:f22ccc0b8772d8e1bcb40f137b373686bc27427a70c0e41dd22b38016e09e7e0 0.6s
=> => extracting sha256:3cf8fb62ba5ffb221a2edb2208741346eb4d2d99a174138e4afbb69ce1fd9966 0.0s
=> => extracting sha256:e80c964ece6a3edf0db1cfc72ae0e6f0699fb776bbfcc92b708fbb945b0b9547 0.0s
=> [ 2/12] WORKDIR /jvc 0.2s
=> [ 3/12] RUN ln -snf /usr/share/zoneinfo/Europe/Minsk /etc/localtime && echo Europe/Minsk > /etc/timezone 0.3s
=> [ 4/12] RUN apt-get update 3.9s
=> [ 5/12] RUN apt-get -y install python3.6 4.9s
=> [ 6/12] RUN apt-get -y install python3-pip 28.0s
=> [ 7/12] RUN apt-get -y install python3-tk 4.9s
=> [ 8/12] RUN apt-get -y install git 4.6s
=> [ 9/12] RUN git clone https://github.com/arvehj/jvcprojectortools.git 0.7s
=> [10/12] WORKDIR /jvc/jvcprojectortools 0.0s
=> [11/12] RUN git checkout wip 0.3s
=> [12/12] WORKDIR /local 0.0s
=> exporting to image 2.2s
=> => exporting layers 2.2s
=> => writing image sha256:9aac5c4f11ca4316c93de11d9588cc9655620724a08004ce38bbe67cc95892a3 0.0s
=> => naming to docker.io/library/jvc:v1 0.0s
$ docker run -v $(pwd):/local -it -t jvc:v1
1 Setup HDR
2 Set brightness and contrast for source
3 Load into projector and tune with contrast control
ga Adjust gamma curve
lp Load preset gamma curve
lf Load gamma curve from file [confname]
Pw Write gamma curve to projector
q! Quit and discard changes
s Save save current gamma parameters [confname]
x Quit and save current gamma parameters [confname]
Select operation: lf 4000nitv3
1 Setup HDR
2 Set brightness and contrast for source
3 Load into projector and tune with contrast control
ga Adjust gamma curve
lp Load preset gamma curve
lf Load gamma curve from file [confname]
Pw Write gamma curve to projector
q! Quit and discard changes
s Save save current gamma parameters [confname]
x Quit and save current gamma parameters [confname]
Select operation: ga
1 Setup HDR
2 Set brightness and contrast for source
3 Load into projector and tune with contrast control
ga Hide gamma curve adjust menu
eo eotf: eotf_pq
il Input Level: Standard (Must match Input Signal Menu)
hl Highlight regions (current None)
bm Set max brightness: 100.0 (Effective 540.5405405405405)
bs Set brightness scale factor: 5.405405405405405
bw Set ref white brightness: 18.5
bbi Set black brightness in: 0.0 (Effective 0.021621621621621623)
bbo Set black brightness out: 0.004 (Effective 0.021621621621621623)
eb eotf black compensation: None
bh Set hard clip: 3977.0
sc Set soft clip start: 150.0 (150.0)
se Set end slope: 0.9
st Set soft clip curve type: 0
sg Set soft clip gamma: 1
p Show plot menu
bwc Scale ref white brightness from contrast (-50 - 50)
Pr Read raw table from projector
lp Load preset gamma curve
lf Load gamma curve from file [confname]
Pw Write gamma curve to projector
q! Quit and discard changes
s Save save current gamma parameters [confname]
x Quit and save current gamma parameters [confname]
Select operation: p
1 Setup HDR
2 Set brightness and contrast for source
3 Load into projector and tune with contrast control
ga Hide gamma curve adjust menu
eo eotf: eotf_pq
il Input Level: Standard (Must match Input Signal Menu)
hl Highlight regions (current None)
bm Set max brightness: 100.0 (Effective 540.5405405405405)
bs Set brightness scale factor: 5.405405405405405
bw Set ref white brightness: 18.5
bbi Set black brightness in: 0.0 (Effective 0.021621621621621623)
bbo Set black brightness out: 0.004 (Effective 0.021621621621621623)
eb eotf black compensation: None
bh Set hard clip: 3977.0
sc Set soft clip start: 150.0 (150.0)
se Set end slope: 0.9
st Set soft clip curve type: 0
sg Set soft clip gamma: 1
ph Hide plot menu
p Plot [s|f]
pc Clear plot
pct Plot clip table
psc Plot contrast (-50 - 50)
pa Auto plot [0|-1|<n>]: On (Clear and Plot w/history 1)
pz Plot zoom [f|u|ur|r|dr|d|dl|l|ul|c|o]
pr Plot reference curve [a|r<index>|c|d<index>]
bwc Scale ref white brightness from contrast (-50 - 50)
Pr Read raw table from projector
lp Load preset gamma curve
lf Load gamma curve from file [confname]
Pw Write gamma curve to projector
q! Quit and discard changes
s Save save current gamma parameters [confname]
x Quit and save current gamma parameters [confname]


and you'll get...

3070152


Hope this helps someone!


Below is the dockerfile. Just create a text file called "dockerfile" and put this inside it. I don't know why AVSForum would not let me upload it.

FROM ubuntu:18.04
WORKDIR /jvc
ENV DISPLAY=host.docker.internal:0
ENV TZ=Europe/Minsk
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
RUN apt-get update
RUN apt-get -y install python3.6
RUN apt-get -y install python3-pip
RUN apt-get -y install python3-tk
RUN apt-get -y install git
RUN git clone https://github.com/arvehj/jvcprojectortools.git
WORKDIR /jvc/jvcprojectortools
RUN git checkout wip
WORKDIR /local
CMD ["python3.6", "/jvc/jvcprojectortools/menu.py"]
 

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i ran the gamma autocal using the omardris method , my target color temp set to 6500k however i kept getting readings closer to 5500k , i autocaled a couple of times but this remained constant , then i chose the target in autocal for 7500k and got results closer to 65k , attaching herein both autocal result ,iris = manual and set to "0" , lamp = low , clear black =off , any idea what could be causing this and possible solutions .
image1(1).jpeg
image0(1).jpeg
 
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