yashsingh1/xdaforums huggingface dataset:
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
Re: Screen Type: Finding it with Franco's kernel

2 people with same settings, I guess this is a fourth type. I'll put it in main post. Thanks!
[Nexus 4 Q&A, Help & Troubleshooting] yokuyuki:
Raising saturation drops the gamma to 1.4-1.6 on rgb. Raising contrast one step did nothing. Raising it two steps gave me 2.1-2.2 R, 2.1-2.2 G, 2.3 B

Oh yeah, I actually got it from him. I just forgot who I got it from.

---------- Post added at 08:38 PM ---------- Previous post was at 08:25 PM ----------

Tried another color profile from slimldj:

rgb 255

whites 4

mids 119

blacks 119

contrast 0

brightness 0

saturation 7

grays 0

And got:

Gray: 2.6

Red: 2.1-2.2

Green: 2.1-2.2

Blue: 2.2-2.3

Yellow: 2.4

Cyan: 2.4-2.6

Magenta: 2.1-2.2
[Nexus 4 Q&A, Help & Troubleshooting] CrimsonSmear:
Spyder4 Elite (v2) - visceralpsyche = Color Calibration Profile v2

Common requested converted profile values > here <.

I have updated my init.d script to include updated and converted profiles > here <.

Hidden below is relevant information and photos for tweaking.

I will attempt to keep this current as new information comes in and for common profiles.
[Nexus 4 Q&A, Help & Troubleshooting] kaiowas82:
updated settings from visceralpsyche

http://xdaforums.com/showpost.php?p=38232073&postcount=14491

from today ;)
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
Thanks!
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
It looks like you will need gamma for individual color channels. Current setting method won't change this. But I would it's already very good. You're virtually at 2.2 here.
[Nexus 4 Q&A, Help & Troubleshooting] MMeester:
AW: Screen Type: Help us find them! (Franco's kernel)

These are further away from 2.2 compared to obsanitys settings on my screen.

Gesendet von meinem Nexus 7 mit Tapatalk 2
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
Do you have corrected values for Obsanity?
[Nexus 4 Q&A, Help & Troubleshooting] kaiowas82:
They work the best for me, i got between 2.2 and 2.3 grey gamma, 1.8 red, 2.1 green, 2.1 blu, 2.2 yellow, but i'm not basing my judgments only on these results, they work best because all my picture are displayed greatly, without any color/banding artifacts, as i showed in the photo i posted yesterday...
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
Yeah, but here, my goal is to find the different screen regardless of what looks better. It's all based on what setting gives you 2.2 gamma for RGB. And screen responses have been all over the place so far.
[Nexus 4 Q&A, Help & Troubleshooting] elzafir:
Re: Screen Type: Help us find them! (Franco's kernel)

Are you planning to collect in the OP all configs that give their owners 2.2 RGB gamma reading? Or just the K, O, V?

Sent from my Nexus 4 pimped with AOKP and Franco.kernel
[Nexus 4 Q&A, Help & Troubleshooting] MMeester:
AW: Screen Type: Help us find them! (Franco's kernel)

I use the values from Francos' app, there's a button for obsanity.
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
I will add all 2.2 gamma that have significant difference with the other color profiles. I have already added Ceejay83's, called it Type C. I really hope this is it. What I need now is people testing those profiles and give us results I can analyze. And if there's more than 6, then there's probably something wrong.
[Nexus 4 Q&A, Help & Troubleshooting] Lynchz7:
Re: Screen Type: Help us find them! (Franco's kernel)

How do I know what gamma I get for each colour?
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
Download Display Tester app.
[Nexus 4 Q&A, Help & Troubleshooting] Lynchz7:
Re: Screen Type: Help us find them! (Franco's kernel)

I already gotten that, so i use the grayscale picture?

---------- Post added at 03:03 PM ---------- Previous post was at 02:24 PM ----------

301K rev11.

Brightness Setting AUTO.

RGB 255

Grey 0

Mids 119

Blacks 119

Contrast 0

Brightness 7

Saturation 7

Whites 4

Almost at 2.2, got frustrated tingling the slides. (According to the gamma detection chart in Display Tester app)

I'm actually quite satisfied with the outcome.
[Nexus 4 Q&A, Help & Troubleshooting] Bluesen:
I am getting 2.2 as well using ceejay83's settings.

None of the other profiles come close (around 2.6 for others).

Will check rev and production date later.
[Nexus 4 Q&A, Help & Troubleshooting] graffixnyc:
I'm getting 2.1 Gamma (with RGB, gray is off and the other colors) on Type C - ceejay83's settings. Type K (corrected values) gave me gamma of like 2.6

301 Serial Rev 11, Franco Kernel r83

My Favorite settings before but gamma was all off was in display app but loved the colors in real situations

Gray=1

Mids=0

Black=255

Contrast=255

Brightness=0

Saturation=202

Whites=1
[Nexus 4 Q&A, Help & Troubleshooting] Archmag3:
So here are the final settings from my side :

RGB 255

grays 0

mids 119

black 119

contrast 12

brightness 2

saturation2

white 0

rev 11

I have adjusted the values as close as possible to my monitor using this yoda wallpaper.https://www.box.com/s/pv6yh43ohqo1vsl6558q

The calibration should be such that the glow in yoda's light saber should not have any artifacts or distortions.It should be a proper smooth glow. :)

Hope you like it.

Cheers
[Nexus 4 Q&A, Help & Troubleshooting] yokuyuki:
Instead of creating new profiles and trying to get 2.2, you should all be just testing the 4 in the OP. There are multiple ways of getting 2.2 gamma on the same screen and we're here to determine how many screen types there are and not to test all profiles.
[Nexus 4 Q&A, Help & Troubleshooting] Archmag3:
already tested and none fits my screen..
[Nexus 4 Q&A, Help & Troubleshooting] yokuyuki:
Odd since your settings and Type C settings perform almost identical for me.
[Nexus 4 Q&A, Help & Troubleshooting] Archmag3:
hehe it all comes down to personal pereferences ;)
[Nexus 4 Q&A, Help & Troubleshooting] yokuyuki:
Not really. Using the display tester is pretty objective.
[Nexus 4 Q&A, Help & Troubleshooting] Anytime1157:
Hi, so I did the test for all except obsanity's, with everything on corrected values @50% brightness.

These are the gamma values I got when using each, the most accurate that my I can perceive :P

212K rev11

Type: R, G, B

K: 2.3, 2.3, 2.4

V: 1.8, 2.0, 2.0

C: 2.0, 2.0, 2.0

Overall K's values are surprisingly the closest to 2.2 for me so it's gona stay :D

thanks for the values, man!
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
Again, we are not talking about tastes and preferences. It's completely irrelevant in this thread. RGB 2.2 is all that matters.
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
Thanks for your help!
[Nexus 4 Q&A, Help & Troubleshooting] graffixnyc:
I updated franco kernel updater to version 8.81 and now it seems the gamma sliders only go to a max 119 value. Anyone else seeing that?
[Nexus 4 Q&A, Help & Troubleshooting] Archmag3:
Why are you being so aggressive ?? Or is it so that if a person doesn't use your setting you get all mad ? :confused: It was an answer to his query and each person is different and each screen is.All we are doing here is finding the golden mean.After that users can adjust and tweak to there liking..some are used to bluish screen temps where are some are to yellow.That is what i'm talking about.It ultimately comes down to how a person sees color.

Just for your reference i have pasted link to nice youtube video.

http://www.youtube.com/watch?v=evQsOFQju08

PS : This will be my last post in this thread.Be happy with your thread.
[Nexus 4 Q&A, Help & Troubleshooting] Anytime1157:
no problem man ;)
[Nexus 4 Q&A, Help & Troubleshooting] CrimsonSmear:
Type O - Obsanity's settings

Corrected values, r83

RGB 255

Grays 0

Mids 119

Blacks 119

Contrast 23

Brightness 0

Saturation 119

Whites 103

I've also updated my init.d script for those that are interested.
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
Sorry you perceived it that way. I'm not being aggressive. But most people are not reading the OP attentively and/or are digressing, I am just reminding every page what this thread is for. I don't mind you don't use the settings provided here, but then this is the wrong thread if you want to discuss about which one looks best, because it is subjective and not the purpose of this thread. Here we talk about an objective thing which is RGB Gamma at 2.2. Which one looks best according to preference and taste doesn't belong here. I am sorry if I seem aggressive again, but I try to keep people on subject. I don't want a huge thread like Franco's where people digress and Franco has to repeat stuff over and over again.

In your case, you didn't read the OP and are giving us your settings based on your preference which is precisely what we try not to do here. We don't even know if gamma is at 2.2 for your screen nor do we know if you screen belongs to 1 of the 4 categories listed in the OP. So please don't act all vexed when people try to keep this thread focused.

That's why I keep telling people, please test the settings provided, tell us if any one of them gives you a gamma of 2.2 for RED, GREEN and BLUE. If not, your 2.2 gamma setting is welcome. Thanks!
[Nexus 4 Q&A, Help & Troubleshooting] Malnilion:
Re: Screen Type: Help us find them! (Franco's kernel)

So far, nobody's settings have gotten me to 2.2 across the board. O's gets me to like 2.8 on gray and 2.2 for the rest with the exception of cyan and yellow which are at 2.4.
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
Thanks! Updated OP.
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
So from my understanding. you have gamma at 2.2 for red, green and blue? Because it's all we ask to know! It looks like your screen is Type O. Thank you for confirming Obsanity settings!

Btw, it's impossible to get 2.2 across the board. You will get it either for grey or RGB, forget about cyan, magenta and yellow. Here RGB is what interests us.
[Nexus 4 Q&A, Help & Troubleshooting] steviewevie:
Re: Screen Type: Help us find them! (Franco's kernel)

It's because obsanity figured out which values are actually valid, and Franco updated the app to reflect that. E.g. old values of 255 actually weren't seen as 255 by that part of the kernel.

Sent from my Nexus 4
[Nexus 4 Q&A, Help & Troubleshooting] Malnilion:
Re: Screen Type: Help us find them! (Franco's kernel)

While O's settings give me 2.2 RGB, they don't look very natural to me. I've adjusted the saturation down and bumped up the contrast slightly and I like what I'm seeing better and I'm still right about at 2.2 for RGB.
[Nexus 4 Q&A, Help & Troubleshooting] yokuyuki:
Are those converted by Obsanity? I heard some conversions didn't really work. I ask because I tried the uncorrected Obsanity and corrected Obsanity and got completely different results.

Type O uncorrected

Gray: 2.2-2.3

Red: 1.8

Green: 1.8-2.0

Blue: 1.8-2.0

Yellow: 2.1

Cyan: 2.2

Magenta: 2.0

Type O corrected

Gray: 2.8

Red: 2.2-2.3

Green: 2.2-2.3

Blue: 2.3

Yellow: 2.4-2.6

Cyan: 2.4-2.6

Magenta: 2.2
[Nexus 4 Q&A, Help & Troubleshooting] Mendanbar:
I really couldn't say. I don't have a professional need to have accurate color like many of the other members here, so I'm mainly just deciding based on a balance of my personal preference mixed with battery performance. I definitely appreciate those of you who are dedicated to accurate display, though. Every single one of the setting adjustments I've seen are leagues better than stock.
[Nexus 4 Q&A, Help & Troubleshooting] graffixnyc:
with type O on Franco r83, Rev_11 I get the following values

Gray in between a 2.6 and 2.8

Red: 2.2

Green: 2.2 (2.3 is pretty close too)

Blue: 2.2 (2.3 is pretty close too)

Not asked for but figured I'd provide as well

Yellow 2.4/2.6

Cyan 2.4

Magenta 2.2
[Nexus 4 Q&A, Help & Troubleshooting] enursed:
AW: Screen Type: Help us find them! (Franco's kernel)

With type O settings on an 212K rev_11 and Franco r83 corrected values, I get following gamma values:

R:2.1-2.2

G:2.2

B:2.2

Edit: lcd_maker_id is primary
[Nexus 4 Q&A, Help & Troubleshooting] Malnilion:
Re: Screen Type: Help us find them! (Franco's kernel)

@graffixnyc,

We definitely have the same display. I guess they're saying that's Type O (negative :P)
[Nexus 4 Q&A, Help & Troubleshooting] CrimsonSmear:
If you follow the link in "Obsanity's settings", you will in fact see that they are his settings and the Recommended Values according to franco.Kernel Updater. I would not be so brazen to submit false settings here given the goal of this thread.
[Nexus 4 Q&A, Help & Troubleshooting] yokuyuki:
Whoa, that's pretty much what I got except I'm on rev 10. I'm beginning to think that these hardware revisions don't matter.

Sorry, I didn't mean to sound accusing. It was just general curiosity as to why the two settings would be so different despite supposedly being the same.
[Nexus 4 Q&A, Help & Troubleshooting] Stixxbixby:
Re: Screen Type: Help us find them! (Franco's kernel)

1st of all, much gratitude to all of u people who r as passionate a nerd as I am with my N4 & for all of the time & work u have dedicated to perfecting this device...

My comment & question : The RGB value differences between Obsanity's & ceejay's settings r negligible on my screen. The other values have more of a disparity, however. Which freaking screen do I have & which setting should I go with?!? :confused:Rev. 10 fyi. PA3 Franco r83

I rarely post, but read A LOT! Thanks again.
[Nexus 4 Q&A, Help & Troubleshooting] CrimsonSmear:
212K rev10 r83 corrected @ 50% brightness

K:2.2,2.2,2.2

O:2.1,2.1,2.1

V:1.8,2.0,2.0

C:2.0,2.0,2.0
[Nexus 4 Q&A, Help & Troubleshooting] yokuyuki:
With the new corrected Obsanity, it's basically the same as Ceejay's for me as well. It's slightly higher gamma, but still very close.
[Nexus 4 Q&A, Help & Troubleshooting] Anytime1157:
out of curiosity i tested the corrected obsanity's @ 50%

212K rev11

Seems that with that setting i got closer to 2.2 across RGB.

To be exact,

R: 2.2

G: 2.2-2.3

B: 2.2

;)
[Nexus 4 Q&A, Help & Troubleshooting] R3dox:
I've been following the color discussion in the franco kernel thread, but didn't feel like trying anything myself before we really know what we're doing (talking about the system of settings here, of course). I was a bit surprised that no one tried to objectively determine what displays there are when it seemed so simple on my sensation. Unfortunately it doesn't seem as clear cut as on that one, but there is a clue.

In a terminal emulator, type "dmesg | grep lcd" (no quotes, needs root and probably a reboot).

There is a long line with all kinds of stuff including a 'lcd_maker_id'. Here it says 'primary'. I have a rev11 N4.

What does it say for you?

I also tried panel, screen and display, but that didn't yield much.
[Nexus 4 Q&A, Help & Troubleshooting] ol@fson:
301K (=January, 2013 - Korea)

Mfg Date: 2013/01/14

HW_rev 11 (= PCB 1.1)

CPU binning: fast

lcd_maker_id: primary

Kernel: r86 (corrected values)

Type K gets me 2.2 for R&G&B
[Nexus 4 Q&A, Help & Troubleshooting] Malnilion:
Re: Screen Type: Help us find them! (Franco's kernel)

I'm type O

LCD maker ID is primary and revision 10.
[Nexus 4 Q&A, Help & Troubleshooting] Lynchz7:
Re: Screen Type: Help us find them! (Franco's kernel)

Which part of the app of Display Tester did you guys used? Gamma Detection section with the gray bars? Or are you guys using pro version of the app?

Wanted to do the tests but I don't know how. Someone please enlighten me.
[Nexus 4 Q&A, Help & Troubleshooting] dagaetch:
go to the Gamma test, once the gray bars loads just swipe the screen to the left. You can flick through the different colors. RGB are the ones that matter most however.
[Nexus 4 Q&A, Help & Troubleshooting] Lynchz7:
Re: Screen Type: Help us find them! (Franco's kernel)

I got it, thanks. Why didn't the app says you're able to swipe to change to other colours? Thanks a lot.

---------- Post added at 06:08 PM ---------- Previous post was at 05:50 PM ----------

301K rev11,

Type O seems to get the closest.

Red = 2.2

Green = Between 2.1 - 2.2

Blue = 2.2
[Nexus 4 Q&A, Help & Troubleshooting] halluci293:
Does anyone else get FC on display tester every time you change color settings? I have to restart display tester and wait for the 7 seconds every time I modify any color setting, which makes calibrating really annoying...

All we really need to calibrate gamma is an image at 1 to 1 pixel zoom, not a whole app... maybe a gamma test image in the franco app for gamma control, instead of the color bars, would make more sense? Something like this is all we really need: http://www.colorserver.net/articles/calibrate_gamma.gif

Edit: For color, something like this would work as well: http://www.lcdreviewz.com/graphics/ColorGammaGradient.png

This has the added benefit of testing gamma over a range of luminance values, rather than just 50%.
[Nexus 4 Q&A, Help & Troubleshooting] CrimsonSmear:
To avoid the FC you need to back out of the Gamma detection screen prior to task switching.

I strongly suggest that you set one profile and use Arstoien's Gamma Tester (it's an overlay and does not require leaving the Gamma detection screen) to setup the remaining three profiles (for switching) prior to opening Display Tester.

If you do not yet have franco.Kernel Updater, you can use my init.d script (it is current).
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
I don't get the lcd_maker_id line, but lines all starting with mipi. Maybe this is something different. I'll add this to the OP. Thanks!

BTW, can you tell us which screen type you have please?
[Nexus 4 Q&A, Help & Troubleshooting] Anytime1157:
there is actually that the lcd_maker_id line dude..it's above all those mipi thingy :P

mine says 'primary' :D
[Nexus 4 Q&A, Help & Troubleshooting] yokuyuki:
Maybe we need to get a google doc going to compare types and batches + rev num to see if there's any kind of correlation.
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
I have come to the same conclusion. Revision aren't it. We'll keep collecting then though, who knows? :P

It really seems Type C and Type O are the same. We'll probably merge them later on.

Well, the one that gives your 2.2 gamma for RGB in Display Tester. Post your results, we'll tell you.

You are really welcome. I'm doing this because I was tired to of this color calibration discussion going nowhere for obvious reasons.
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
lol, mine really doesn't show. It show only mipi stuff... Weird... ^^

I have the intuition that Primary is Type O.
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
The count so far:

Type K - 5

Type O - 11

Type V - 1

Type C - 4

C and O are probably the same. Noone has confirmed Type V yet, 1 being VisceralPsyche himself. In conclusion, we are leaning toward 2 screens version in our Nexus 4. Looks promising!
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
btw, should we take out uncorrected values? It seems Obsanity's corrected and uncorrected are not the same...
[Nexus 4 Q&A, Help & Troubleshooting] DesertVelo:
210K Rev10 R85 Corrected @ 50% brightness

K: 2.4, 2.4, 2.6

O: 2.2, 2.2, 2.2

V: 1.8, 2.0, 2.0

C: 2.1, 2.1, 2.1

lcd is primary.
[Nexus 4 Q&A, Help & Troubleshooting] yokuyuki:
You can try them yourself, but they're quite different for me.
[Nexus 4 Q&A, Help & Troubleshooting] CrimsonSmear:
I would agree to the removal of uncorrected values, as there is a real and tangible difference. Retesting Type C with Type O corrected may in fact determine whether or not they are indeed the same.

As for visceralpsyche's professional settings... Monkeybrew also has professional settings that fall within Type V category. But I have to wonder, with their RGB so low for true calibration, might they fall into another Type under the pretenses that you seek?
[Nexus 4 Q&A, Help & Troubleshooting] Malnilion:
Re: Screen Type: Help us find them! (Franco's kernel)

I don't want to slander anybody, but after looking at VisceralPsyche's settings, I kinda doubt his credentials. There's no way that his settings improve the quality of any Nexus 4 display out there unless that Nexus 4 has a seriously ****ed up, way-too-bright display that ought to be RMA'd. Even if the colors end up being more balanced, by bringing down the RGB color values so far, the display gets way too dark. Full brightness won't even cut it outdoors. And having 2.2 RGB gamma doesn't make a damn bit of difference if the visual experience is terrible. I doubt someone's sanity if they prefer his settings.
[Nexus 4 Q&A, Help & Troubleshooting] Kel Ghu:
I will retest them, but I also need feedback from you guys.

Yeah, I saw Monkeybrew settings in Franco's thread too. They are almost identical, really. It's the same screen to me.

I do doubt too. I don't believe one needs to lower RGB settings that low to correct colors. But in this thread, no one has confirmed VisceralPsyche's settings yet. And I don't thing anyone will, which is actually good news.
[Nexus 4 Q&A, Help & Troubleshooting] michaelop:
How do you get the correct gamma value in display tester? Do you check the middle part of the bars against the parts above and below or do you check against the background? Display tester says you should check against the background but I guess some people may also use the second method and therefore we have different results.

EDIT:

Checking Kel Ghu's values against the bars above and below gives me RGB 2.2. But comparing the bars with the background says RGB ~2.0
[Nexus 4 Q&A, Help & Troubleshooting] ceejay83:
Re: Screen Type: Help us find them! (Franco's kernel)

You compare with the bars on the sides of the screen
[Nexus 4 Q&A, Help & Troubleshooting] halluci293:
I actually think VisceralPsyche's settings are among the best in the list. One thing most people don't realize is that recommended screen luminance be between 90 and 120 cd/m2 for proper calibrated screen viewing (keep in mind that this is with print matching purposes in mind). Given that out of the box, most standard lcd displays are closer to a default of 300cd/m2, people tend to be used to really bright screens, that generally have a much cooler color temperature as well compared to 6500k. For example, after calibration, on my Dell LCD monitors at work I have the brightness setting at 10 out of 100.

One caveat about the above discussion: 90-120 is meant for indoors viewing, with 120 for brightly lit (lots of windows and sunlight entering room), but all are away from direct sunlight shining on the screen. Outdoors though, the story is completely different, and calibration is kind of moot since direct sunlight is so bright that it will destroy perceived color from any screen anyway.

One more thing: I'm a little wary about the accuracy of the display tester app's gamma calibration images. For one, they use a checkerboard pattern as far as I can tell rather than the standard horizontal lines. The Checkerboard pattern is NOT recommended for many screens, as at the hardware level, neighboring pixels may not be able to go from 0 to full 255 in the space of a single pixel width. Secondly, I have no idea what's going on in between the different bars in the gamma screens, since especially for gray, I get a serious green tint that does not match any of the bars or the surroundings.

I've created a gamma test image for 25%, 50% and 75% percieved luminance at 2.2 calibration, which I've attached below. Each square should match the block surrounding it. This is in the same dimensions as the calibration_test.gif image I extracted from the franco kernel updater app. I've posted these in the franco kernel thread if francisco wants to incorporate, but if you want to manually replace the image in the apk in the meantime, this should work (just rename the attachment to calibration_test.gif, overwrite the original gif image in the apk, resign it, and flash). With my test image, visceral's settings seem to give me pretty good gamma values.