Database Users

[Q] Black & White Rendering Question

I know there are several ways to tweak the color settings on the Nexus 4 if you use certain kernels, including the RGB 0-255 values and contrast settings through apps such as the paid version of the Franco.kernel updater. I've fooled around with these a bit, and I like the contrast settings but usually roll back to defaults because they are noticeably dimmer than defaults, which is likely to make me turn up the brightness and use more battery. What I'm wondering is if there's a way to remove all color from the display and use a black and white rendering instead? It isn't out of any necessity, I'm just curious and sometimes like reading certain things in B&W because unnecessary colors in ads or UI elements can be distracting. Any suggestions or advice would be appreciated. Thanks.

[TIP] [Remove Blue Light from Screen by changing Kernel Settings]

Hi
So let's take a break from pursuing after Lollipop and improve what we have
Well, many of us know that a report came out suggesting that 'blue light' emitting from screens of mobile phones, TVs, PCs etc is harmful to the eye and causes sleeping problems.
And then many apps started coming out which remove/filter the blue light from phone screens, such as Bluelight Filter, Dark Screen, Twilight etc.
These apps do what they say but :-
1) They don't do it perfectly
2) You have to manually disable them each time you install something or grant superuser access to an app
3) Few of them consume fair amount of battery
4) And some people may be annoyed by the fact that it always stays on the notification bar.
So here's another the way of removing the blue light without causing any of the above mentioned problems
The way is to change the kernel settings, rather the screen color settings by using kernel tweaking apps like Faux123, Trickster Mod etc which almost every custom kernel user has.
So open your kernel tweaking app and go to' Screen' settings or 'Screen Color' settings or whatever is there and just reduce the quantity of the blue color according to your preference
I have attached a screenshot of blue light being reduced using Trickster Mod app.
Don't forget to hit thanks if this helps

Thanks for the tip,
I've seen someone using bluelight filter app with his z3 compact, i couldn't figure why. Now i know. The screen of his phone looked pinky though.

Semseddin said:
Thanks for the tip,
I've seen someone using bluelight filter app with his z3 compact, i couldn't figure why. Now i know. The screen of his phone looked pinky though.
Click to expand...
Click to collapse
The screen becomes rather yellowish reducing the blue light

Meuuks13 said:
Hi
So let's take a break from pursuing after Lollipop and improve what we have
Well, many of us know that a report came out suggesting that 'blue light' emitting from screens of mobile phones, TVs, PCs etc is harmful to the eye and causes sleeping problems.
And then many apps started coming out which remove/filter the blue light from phone screens, such as Bluelight Filter, Dark Screen, Twilight etc.
These apps do what they say but :-
1) They don't do it perfectly
2) You have to manually disable them each time you install something or grant superuser access to an app
3) Few of them consume fair amount of battery
4) And some people may be annoyed by the fact that it always stays on the notification bar.
So here's another the way of removing the blue light without causing any of the above mentioned problems
The way is to change the kernel settings, rather the screen color settings by using kernel tweaking apps like Faux123, Trickster Mod etc which almost every custom kernel user has.
So open your kernel tweaking app and go to' Screen' settings or 'Screen Color' settings or whatever is there and just reduce the quantity of the blue color according to your preference
I have attached a screenshot of blue light being reduced using Trickster Mod app.
Don't forget to hit thanks if this helps
Click to expand...
Click to collapse
Which version of trickster mod did you use, i do not see anything related to screen settings in the version i have

ASUS can do so much with their Splendid display tuning app!

The Blue Light Filter mode can replace 3rd party apps like cf.lumen, Twilight and Lux's night mode. It's a stock method of customizing the display color temperature.
ASUS should copy a leaf from cf.lumen's book and add the capability to automatically calculate sunset by your GPS coordinates and turn BLF mode on at night! Later at night they can add option to automatically change color temperature to more red tones (i.e. setting the BLF mode slider all the way to the right) like cf.lumen's sleep mode!
Thanks to Splendid display tuning, I no longer have cf.lumen installed. But! I do miss the convenience of automating things. Having the display tuner widget in quick settings is nice but no cigar!

Similarly when bright sunlight detected, the Splendid app could have option to turn vivid mode on.
Cyanogenmod12 and by extension CyanogenOS12 already has both these options (night mode and CABC for bright sunlight mode similar to vivid) available in their display options settings.

Perhaps these suggestions should be forwarded to Asus...as they seem to be set on providing timely updates to the phone(awesome), they might listen. I do like the Splendid app.

I agree. And now that we have this option: @Asus_USA
Maybe a rep here would forward the suggestion?

thedisturbedone said:
I agree. And now that we have this option: @Asus_USA
Maybe a rep here would forward the suggestion?
Click to expand...
Click to collapse
Timed profiles for Splendid would be great. A more effective colour temperature adjustment, coupled with a considerably lower minimum screen brightness on a hardware level would make this phone SO much more usable for late-night reading.

Detect Active Display in Tasker

Does anyone know a clever way to detect the active display in tasker? Currently I use luxauto brightness to keep the OLED display dim in the house, but the same filtering it does to get below 0 brightness also grays out the eink side, particularly when I have it face down on a desk. It's easy to detect and act on that state with the proximity sensor, but it would be nice if there were a way to trigger based on active display so that I can disable lux in low brightness situations where it isn't face down and I am using hte eink screen.

I was able to figure things our digging through the source code Jeopardy posted, sorry for not digging around more before posting. If anyone else wants to replicate here are the basics, I can provide more detail or screenshots if needed. I disable lux in tasker with a profile that looks for event intent received "yotaphone.intent.action.MIRRORING_START". I have a task that reenables lux whenever the intent yotaphone.intent.action.MIRRORING_STOP_MANUAL or yotaphone.intent.action.MIRRORING_STOP are received (2 profiles, each trigger the same task).
http://forum.xda-developers.com/yotaphone-one/development/widget-yota-toolbelt-t3145462

It's great to see you found use for my findings. Just out of curiosity, is there a specific reason you could not just use android's automatic brightness? I think you could even modify the threshold levels for it with some xposed module.

Jeopardy said:
It's great to see you found use for my findings. Just out of curiosity, is there a specific reason you could not just use android's automatic brightness? I think you could even modify the threshold levels for it with some xposed module.
Click to expand...
Click to collapse
Lux seems to do things much cleaner, allows sub-zero brightness, and is more customizable as far as number of points and smoothness of transitions. I noticed that gravity box might have had a way to do things like this after I installed lux.

Blue light Filter problem with apps on playstore

Hi ,
I have noticed a problem in blue light filter in apps available in market.
They ask for permission for drawing over apps. And the effect they produce is not similar to reducing blue color but putting a yellow/brownish layer, which makes black look brownish. When compared to the bluelight filter option given in the ROM itself , there is noticeable difference. The color doesnot look washed out. Black is still black. And the sharpness is maintained. Only thing is it lowers blue light emission from screen.
I have Samsung Galaxy Note 4 with Marshmallow and it doesnot have inbuilt bluelight filter. I want to stay with same ROM but am ready to root device if some application can actually modify contrast. I have heard that screen resolution can be modified with adb so i am ready to experiment color correction through that as well.
Hoping for a early reply,
Thanks
Ankit