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Hi, i've got the Xperia Z and i'm disappointed about the camera quality.. Pictures seems to be compressed and light size... Is there any issue ? Thanks?
slipknot512 said:
Hi, i've got the Xperia Z and i'm disappointed about the camera quality.. Pictures seems to be compressed and light size... Is there any issue ? Thanks?
Click to expand...
Click to collapse
Honestly pictures are quite nice in my opinion, anyway Krabappel has made a little mod in his ROM and the quality is higher
http://forum.xda-developers.com/showthread.php?t=2175903
Maybe he could post a file or something to apply this settings in other ROMs, but it's up to him...
hope someone would make this mod too, usually in some phones the mod is just a modded camera.apk in others was a modded xml... i hope someone could make a rom-independent mod, cause i'm fine with rooted stock rom
I take it that you don't like soft images? Anyway, we know the potential of Sony rs sensor, we just need Sony to tweak the camera to match the sensor potential.
Sent from my XZeenator
vainqueur said:
I take it that you don't like soft images? Anyway, we know the potential of Sony rs sensor, we just need Sony to tweak the camera to match the sensor potential.
Sent from my XZeenator
Click to expand...
Click to collapse
Sony never released updates for their Smartphone cameras, sorry to destroy your hopes but it's less likely that they will do it this time.
Higgins12 said:
Sony never released updates for their Smartphone cameras, sorry to destroy your hopes but it's less likely that they will do it this time.
Click to expand...
Click to collapse
OMG!:crying:
Improve Quality of the images
GSeeker said:
OMG!:crying:
Click to expand...
Click to collapse
Hello Boys and girls.
Yesterday i found a method to improve the quality.
I hope it works.
I feel it just a little bit improvment.
What do you need:
Xperia Phone (I think it works also for other models)
root access
a file manager with root function
How to do:
MAKE A BACKUP OF YOUR ROM WITH RECOVERY
looking for the file "media_profiles.xml" in the folder "/system/etc"
make a backup of it
open with a text editor
looking for the code
Code:
<ImageEncoding quality="90"/>
<ImageEncoding quality="80"/>
<ImageEncoding quality="60"/>
<imageDecoding memCap="20000000"/>
change all three values of "ImageEncoding qulity" to "100"
and change the value of "imageDecoding memCap" to "80000000"
Please be carefuly
I'am not responsible for any bricks
Hope you will fell the difference
Sorry for bad english
Nope sorry but it doesn't change anything.
ImageEncoding set to 100
ImageEncoding set to 10
Higgins12 said:
Sony never released updates for their Smartphone cameras, sorry to destroy your hopes but it's less likely that they will do it this time.
Click to expand...
Click to collapse
:crying::crying::crying:
Higgins12 said:
Nope sorry but it doesn't change anything.
ImageEncoding set to 100
ImageEncoding set to 10
Click to expand...
Click to collapse
To me it changes: the 100 pic is a bit darker with richer colours, same effect that was found in the Rom i pointed out before...
Shooting pics in burst mode noticeable improves picture quality. Give it a shot
Sent from my C6603 using Tapatalk 2
AW: [REQ] Camera Mod ?
Yes i also think that the pictures got better colors
Sent from my C6603 using xda app developers app
sufeng said:
Hello Boys and girls.
Yesterday i found a method to improve the quality.
I hope it works.
I feel it just a little bit improvment.
What do you need:
Xperia Phone (I think it works also for other models)
root access
a file manager with root function
How to do:
looking for the file "media_profiles.xml" in the folder "/system/etc"
make a backup of it
open with a text editor
looking for the code
Code:
<ImageEncoding quality="90"/>
<ImageEncoding quality="80"/>
<ImageEncoding quality="60"/>
<imageDecoding memCap="20000000"/>
change all three values of "ImageEncoding qulity" to "100"
and change the value of "imageDecoding memCap" to "80000000"
Hope you will fell the difference
Sorry for bad english
Click to expand...
Click to collapse
Thanks but i've seen no différence after thé changes.. And i can't capture vidéos until i restore the original file..strange !
slipknot512 said:
Thanks but i've seen no différence after thé changes.. And i can't capture vidéos until i restore the original file..strange !
Click to expand...
Click to collapse
Strange but I can capture videos without any problems.
This completely crashed my phone I tried to record a video and a warning message came up saying it was overheating so shutting down. Then when i powered it up it crashed as soon as it got to the home screen. Tried to get it back to CWM and crashed on that screen and powered itself down then wouldn't boot again! Charged it all last night, tried pressing Power and Vol+ etc Nothing... completely dead, only a charging LED light. Luckily took it back to Carphone Warehouse and they swapped it with another Great service! So yeah... not sure why mine was different/what went wrong etc. It was a locked bootloader but rooted with CWM.
I still working for Xperia Z Camera Mod, later i will post if already tested
maybe someone know me All Xperia 2011/2012 have my Camera Mod Cyber-shot
Just wait guys
Smells exciting thank's for trying Master
Rizal Lovins said:
I still working for Xperia Z Camera Mod, later i will post if already tested
maybe someone know me All Xperia 2011/2012 have my Camera Mod Cyber-shot
Just wait guys
Click to expand...
Click to collapse
Now that IS exciting news!
Rizal Lovins said:
I still working for Xperia Z Camera Mod, later i will post if already tested
maybe someone know me All Xperia 2011/2012 have my Camera Mod Cyber-shot
Just wait guys
Click to expand...
Click to collapse
Are you planning to bring burst mode to 2012/2011 Xperias?
Sent from my ST25i using Tapatalk 2
Yes!!! Cybershot mod!! Finally you have returned. Make my xperia z fly the same way you did to my ion!!
For all those who are complaining still saying they made a wrong choice over XZ buying a Butterfly or a HTC one .. try this and let us see if you still complain
and for others who are happy with the XZ this will make you even more happy..
First on the settings display white balance set your white balance settings as 9 /220 that is the hue / saturation settings
next set your display brightness to about 95% or even 100..
install this app from the play store
https://play.google.com/store/apps/details?id=com.kovit.p.filteryourscreen&feature=search_result
this app will not require any root
once you open this app set the filter to Alpha as 65 and rest all 0 and apply to your screen and see the difference , you may feel a bit less bright than before but now after applying the filter see your phone from all angles and see if you still see washed out colors , I have tried it and works absolutely fine love my XZ even more
Hit thanks If it helped you...
If there's any way to make higher saturation.
thienbrand said:
If there's any way to make higher saturation.
Click to expand...
Click to collapse
to be honest if you are looking at your home screen for example the best way to get more saturation is to open your wallpaper in album app take a screen shot and then apply it as wall paper , other wise album n movies anyways increase the saturation.. so thats a workaround
also there is settings on the flter app where you can tinker with RGB so you have on screen realtime display with filter so you can set it as per your needs ,.
The best way to increase the saturation using the fiter is use the below formula to set it ... as per your liking
changing the saturation you would increase all of the values by the same amount for example 150,250,150.
so if you set R to 150 set G to 250 and B to 150 so R and B same value and 75% more to the G
this way the saturation will increase without increasing the brightness..
Hope this helps...
to be honest, i don't seem to see any serious difference besides that the screen is dimmer. sorry
shulmus said:
to be honest, i don't seem to see any serious difference besides that the screen is dimmer. sorry
Click to expand...
Click to collapse
+1. I think the same effect could be achieved just by lowering the backlight brightness to minimum.
did u try fidelling the rgb ? i did that
Xperia Z has the best screen I've seen... I've tried the HTC1 and S-Note II.
I like my white, white not weirdish yellow like the note or bluishlike the HTC.
Becides white, this screen produces all the colours very well, taking a screenshot viewing it on my tv they look identical sending it to my arc the colours were more brighter and blurry. My s2 is broken. So don't know there.
Tl:dr
I don't understand what anyone means with the colours being washed out.
I don't even have angle problems
It only dimmed down the screen. Not really working.
more hope anyone can make the bravia engine 2 working everywhere. This will make the screen one step ahead.
that aint going to happen..although i'd like to see bravia engine on unlocked bootloader
Bravia Engine sucks, it destroyes so much details in pictures...
Sorry but it doesn't work, and it couldn't possibly work. The filter doesn't affect how anything is rendered, it only applies a filter on the top of the image that can make it darker and lower the saturation - it can't make it higher though as this would require modifying the rendering driver.
That app is exactly doing what the stock white balance filter is doing, no....?
Sent from my Sony Xperia Z using xda premium
Montague said:
That app is exactly doing what the stock white balance filter is doing, no....?
Sent from my Sony Xperia Z using xda premium
Click to expand...
Click to collapse
not really , the app does not have the access to the actual screen drivers to it tries to filter or tweak the existing display area by applying the filtetr,
I realised it basically dims the screen by putting a layer of transperancy and then tweaks that not great for outdoors but indoors you will get a good visiblity with the tweak,
The permanent bravia engine is something I am sure devs need to find out.. not very hard nor easy ,,, just need to find the right code that when we open album app the BE2 gets triggered if that trigger can be added to the init.d script I think we will have permanent BE2 on all areas..
Bravia engine only works during gallery and video, doesnt work with regular use...or so i believe
G1_enthusiast said:
Bravia engine only works during gallery and video, doesnt work with regular use...or so i believe
Click to expand...
Click to collapse
yes , so when u open gallery or video the BE2 script or app may start so if we find that out and include it in the startup script that should give overall BE2 NO?
anirudhks said:
yes , so when u open gallery or video the BE2 script or app may start so if we find that out and include it in the startup script that should give overall BE2 NO?
Click to expand...
Click to collapse
I'm confused, u want to stop BE2 or enable it all the time? U can stop BE2 all together by trying to unlock vootloader
Sent from my SGH-T999 using xda app-developers app
G1_enthusiast said:
I'm confused, u want to stop BE2 or enable it all the time? U can stop BE2 all together by trying to unlock vootloader
Sent from my SGH-T999 using xda app-developers app
Click to expand...
Click to collapse
I want to enable it all the time , so therefore better home screen and other apps ... for example when you open lets a wallpaper app like HD wallpapers , the pics appear allready with the BE2 applied..
anirudhks said:
I want to enable it all the time , so therefore better home screen and other apps ... for example when you open lets a wallpaper app like HD wallpapers , the pics appear allready with the BE2 applied..
Click to expand...
Click to collapse
From what I seen the BE2 produce more whites then regular so not sure if that will work to your advantage
Sent from my SGH-T999 using xda app-developers app
Sony BRAVIA Engine 3 Ported To The Galaxy Note II
The Sony Mobile BRAVIA Engine 3 is a video enhancement program for Sony phones. It uses filters and algorithms to create a clearer and more contrasted picture and an overall smoother experience. This is perfect for the Note II's huge HD screen but can be a little to saturated for people like photographers who want to see how the photo looks exactly with out any enhancements. The change is not huge but is definitely noticeable if two devices are compared. This program is very light weight and works with all models of the Note II so far.
While the latest BRAVIA ENGINE 3 builds on tried and tested BRAVIA ENGINE technology, it does so with the advantage of a new picture processing software.
This new technology has allowed BRAVIA ENGINE to improve - even in respect to its own dazzling performance:
Contrast. Increased depth and clarity, as well as new light control technology to control peak brightness levels, means stunning images even on the brightest of scenes.
Colours. New colour histogram technology detects and optimises overall colour distribution of each frame. This technology delivers breathtaking colour by making millions of improvements to each frame before you even see it.
Detail. Advanced Noise Reduction lies behind BRAVIA’s ability to show you every blade of grass on a football pitch and really put you at the heart of the action.
INSTRUCTIONS:
Download Attatched Zip
Boot Into CWM/TWRP Recovery
Wipe Dalvik Cache And Format Cache
Backup (Optional But Suggested)
Choose Downloaded Zip And Flash
Reboot
Done!
Tested by me on and working my optimus 4x HD rom JellyBeer 4.32
But it should work on all devices
grateful for this rom: demetris_I
THANKS:
{C0deF0x}
Original text by him and adapted by me
Flashed it, nothing seems to have changed. How do I know if it's on ?
Sent from Cybertron! ~Optimus Prime out!
NightyNight said:
Flashed it, nothing seems to have changed. How do I know if it's on ?
Sent from Cybertron! ~Optimus Prime out!
Click to expand...
Click to collapse
The way this show as attached root> system> etc locate files
be_movie and be_photo
if they are there is because it is active!
as they say the bravia engine is only noticeable in photos and movies.
Alright thanks! Be_movie be_photo is on. Photos looking pretty good. I actually have an xperia zl next to me to compare. Looks pretty good.
Sent from Cybertron! ~Optimus Prime out!
NightyNight said:
Alright thanks! Be_movie be_photo is on. Photos looking pretty good. I actually have an xperia zl next to me to compare. Looks pretty good.
Sent from Cybertron! ~Optimus Prime out!
Click to expand...
Click to collapse
What about videos ? I mean recording a video ? Does it look better ? colors and contrast ?
I will never understand those who want to ruin the real colors. For me, the screen is supposed to give the best reproduction of the real colors.
Lie will never be better than the truth - even when the photo/video is creepy.
JAsko_san said:
What about videos ? I mean recording a video ? Does it look better ? colors and contrast ?
Click to expand...
Click to collapse
I honestly cant say for sure since I've been using this so long I don't remember what it would look without the Bravia Engine, that said, as far as I know...this does not affect videos in any way...photos only.
DidierDrigbi said:
I will never understand those who want to ruin the real colors. For me, the screen is supposed to give the best reproduction of the real colors.
Lie will never be better than the truth - even when the photo/video is creepy.
Click to expand...
Click to collapse
Because its a smartphone. A device for fun and entertainment as well as business and communications.
Want real colors and truth, look away from the screen.
would this work on my LG motion? or only on optimus 4X
Is this working on SlimBean 1.8?
smonist said:
Is this working on SlimBean 1.8?
Click to expand...
Click to collapse
I've tested this mod on cm10.2 (although can't tell the difference), so it will most likely working fine on any CM based rom such as slim bean.
Only Chuck Norris can judge me
IntroductionSo I was wondering what X-Reality is and decided to search it up.
I found a video about X-Reality, explaining what it is and what it does.
I decided to test it out myself. Using a port for the Xperia V.
I want you all to watch this video and reply about what you think about this.
Is it worth the port? Is it good?
VideoClick here to watch
My Personal TestingSo after a few testing with Bravia Engine 2 and X-Reality,
I found out that there's not much difference in the quality.
I can't provide proof. That's why I want to discuss this with you all.
Actually, you cannot compare it with "unofficial" device
The best compare, it's with real device which support X-Reality engine
Also GPU and display density can make soo much different
=)
Yenkazu said:
Actually, you cannot compare it with "unofficial" device
The best compare, it's with real device which support X-Reality engine
Also GPU and display density can make soo much different
=)
Click to expand...
Click to collapse
True but based on what she said in the video, it doesn't have any difference.
Yes you can trust her research. You can learn more about it in her Triluminos video. There she explains things more deeply.
thedisturbedone said:
Yes you can trust her research. You can learn more about it in her Triluminos video. There she explains things more deeply.
Click to expand...
Click to collapse
Yea. I watched it. Seems like X-Reality isn't a big upgrade from Bravia 2.
Sent from my LT25i using Tapatalk 2
BloodLust012 said:
Yea. I watched it. Seems like X-Reality isn't a big upgrade from Bravia 2.
Sent from my LT25i using Tapatalk 2
Click to expand...
Click to collapse
Yeah and its almost nothing compared to Amoled
True but from time to time, Bravia Engine 2 actually makes the screen looks much sharper than Super Amoled.
Sent from my LT25i using Tapatalk 2
Have you taken the time to look at one of the recent Amoled devices from Samsung like the Note 2 or Gs3 there actually a bit on the dull side at times there screens don't have as much pop as the older Amoled screens of the past though there is defiantly some improvements as so as the Gs4 as well with it being even sharper with a better colour range or something the Trluminus for mobile is at least a decent display I'm sure it won't disappoint to bad I'm hoping and waiting for Sony to launch a device again compact like the ZL but like the Z1 in the spec department before I buy another Sony smartphone .
So I know that our display is fading when it stands vs HTC, LG, Samsung screen but if we make Bravia Engine always ON the situation changes, the screen could be equal or maybe a little bit better than others with more power consumption.
So its this possible..to have bravia engine in games, homescreen, anywhere in sistem? As I read on the internet I didnt found an exact answer for this question.
nemer12 said:
So I know that our display is fading when it stands vs HTC, LG, Samsung screen but if we make Bravia Engine always ON the situation changes, the screen could be equal or maybe a little bit better than others with more power consumption.
So its this possible..to have bravia engine in games, homescreen, anywhere in sistem? As I read on the internet I didnt found an exact answer for this question.
Click to expand...
Click to collapse
Theoretically it would be possible but the battery drain would be enormous ATM, unless Sony delivers some tweaks!
That's probably the reason why they haven't done.that in the first place!
Sony.would be better off with an oled display, tweaking it and sticking the BE2 ENGINE or x-reality into that, saving battery consumption. Then they would be unbeatable for a while!
Sent from my C6603 using XDA Premium 4 mobile app
nemer12 said:
So I know that our display is fading when it stands vs HTC, LG, Samsung screen but if we make Bravia Engine always ON the situation changes, the screen could be equal or maybe a little bit better than others with more power consumption.
So its this possible..to have bravia engine in games, homescreen, anywhere in sistem? As I read on the internet I didnt found an exact answer for this question.
Click to expand...
Click to collapse
I guess not.
And my screen is better than the sgs4's. I can't see a big difference between mine and htc one's either.
Sent from my Xperia™Z»4.3Leak«
Not really. I can say that HTC One has easily the best screen on the market.
Sent from my C6603 using XDA Premium 4 mobile app
I think it would be better if the devs try ing to get be2 or x reality to work on unlocked bootloader.
For crying outloud.....my galaxy nexus has be2 but a sony phone a little modified couldnt get be2 to work when its unlockud? Its sonys concept wtf....hahahahahahh
Sent from my C6603 using xda app-developers app
Once sources go out for GPE Z Ultra, I'm quite sure devs will port X-Reality and other handy features.
X-reality & Bravia engine it just marketing Bull****
rzuku90 said:
X-reality & Bravia engine it just marketing Bull****
Click to expand...
Click to collapse
Hmm. NO.
Sent from my Xperia™Z»4.3Leak«
it would be nice to have it all time so...just to have it there in case that we want to compare our screen to another phones screen.
bioan said:
Once sources go out for GPE Z Ultra, I'm quite sure devs will port X-Reality and other handy features.
Click to expand...
Click to collapse
How to make the X reality work if you have unlocked bootloader?
demon2112 said:
I think it would be better if the devs try ing to get be2 or x reality to work on unlocked bootloader.
For crying outloud.....my galaxy nexus has be2 but a sony phone a little modified couldnt get be2 to work when its unlockud? Its sonys concept wtf....hahahahahahh
Sent from my C6603 using xda app-developers app
Click to expand...
Click to collapse
corect and this is a wierd thing .
Tommy-Geenexus said:
I guess not.
And my screen is better than the sgs4's. I can't see a big difference between mine and htc one's either.
Sent from my Xperia™Z»4.3Leak«
Click to expand...
Click to collapse
In the past I was like my sony xperia z screen is the best and I could not BELIEVE all sites that sayd that SXZ has a weak screen(like on a low end phone) and when I compared with a Samsung Screen(s4/note 3)..i Was like nooooooooooo way my screen its ****ty...
And I said I dont understand so SONY ..sells 13 MP camera and screen to others but for them they cant do a good screen or a really good camera.
nemer12 said:
it would be nice to have it all time so...just to have it there in case that we want to compare our screen to another phones screen.
How to make the X reality work if you have unlocked bootloader?
corect and this is a wierd thing .
In the past I was like my sony xperia z screen is the best and I could not BELIEVE all sites that sayd that SXZ has a weak screen(like on a low end phone) and when I compared with a Samsung Screen(s4/note 3)..i Was like nooooooooooo way my screen its ****ty...
And I said I dont understand so SONY ..sells 13 MP camera and screen to others but for them they cant do a good screen or a really good camera.
Click to expand...
Click to collapse
When i compared my screen to a sgs4's one i was like omg is my display bright.
And the s4 had only bit better colours but nuffin more.
Sent from my Xperia™Z»4.3Leak«
OK its quite late , but I can suggest you some alternative try it and lemme know..
google is your best friend , search for Screendim.apk and install it
enable it and set the bottom bar ( contrast ) for about 60% and the brightness on top for about 60-70% and now tell me how dark or colorful your screen looks
this defnitely works.. not perfect but close to BE alwasy ON types..
Tommy-Geenexus said:
When i compared my screen to a sgs4's one i was like omg is my display bright.
And the s4 had only bit better colours but nuffin more.
Sent from my Xperia™Z»4.3Leak«
Click to expand...
Click to collapse
Fanboy alert. You didn't see very grey black, fogged colours, bad view angles etc? So you have some problems with your eyes (or just fanboy). Even 2 years old phones have batter screens than Z.
Wysłane z mojego C6603 przy użyciu Tapatalka
slowik515 said:
Fanboy alert. You didn't see very grey black, fogged colours, bad view angles etc? So you have some problems with your eyes (or just fanboy). Even 2 years old phones have batter screens than Z.
Wysłane z mojego C6603 przy użyciu Tapatalka
Click to expand...
Click to collapse
Nope. Neither my Xperia S nor my Xperia Neo nor my Nexus 4 nor everything i've owned had a better screen.
Maybe there are some people on the world who like natural colours, becoz after looking at a amoled display my head hurts.
The display of the lg g2 is the only one which impressed me though, this is miles better, but nothing else.
Sent from my Xperia™Z»4.3Leak«
rzuku90 said:
X-reality & Bravia engine it just marketing Bull****
Click to expand...
Click to collapse
+1
If you display some screen calibration patterns while using bravia engine, you see how bad it is for fidelity. It just oversaturates, tints, and destroys detail in brighter and darker areas of images/videos.
If a phone has a screen of 300/1 contrast ratio, there is no way some software can improve this, it only can put some make up but at the cost of some other things, just like LCD's are doing since the beginning with dynamic contrast and all that bullsh*t, where you see skin become shiny bright and where there used to be a dark grey shadow over a black background, then it becomes all black and no shadow.
BE is the first thing i disable in all my Sony products, and its equivalent in any non Sony product.
I think that our screen without bravia its complety UGLY! :-&
I never had any issues with the colours on my device. Infact I prefer them this way as opposed to colour popping and extra vibrant. Infact I turn down that setting on my LCD monitor. A friend of mine did a side by side comparison against his Samsung device and the 1st thing he notices was the colour was more toned down then said he actually preferred the Sony display. Point is some ppl like the toned down visuals and others like them vibrant but funny how as someone says they have no issue with the Sony display they are labeled a blind fanboy.
As for viewing angles, Also never had an issue with them due to the fact that I always take up my phone when I want to look at it (always, its a habit of mine) and never just glance at it while it is on a desk or anything like that.
Xperia Z Screen is OK, i have been using it everyday since launch date, viewing angles may be low, but that is something i forgot completely in everyday use. Screen brightness is more than enough, contrast is ok, and visual fidelity is great (as long as you have BE2 deactivated).
For people saying there were better screens two years ago, please point me to a device released two years ago with a 5" FullHD screen with better specifications.
We all know the XZ screen, today, is not one of the best FullHD screen on a smartphone, but it was the first released.
RoberM said:
Xperia Z Screen is OK, i have been using it everyday since launch date, viewing angles may be low, but that is something i forgot completely in everyday use. Screen brightness is more than enough, contrast is ok, and visual fidelity is great (as long as you have BE2 deactivated).
For people saying there were better screens two years ago, please point me to a device released two years ago with a 5" FullHD screen with better specifications.
We all know the XZ screen, today, is not one of the best FullHD screen on a smartphone, but it was the first released.
Click to expand...
Click to collapse
Finally someone with a little knowledge.
Don't forget, before a smartphone is released, how long it takes to develop.
The screen isn't poor at all. I feel really sorry for people saying this and hope.that their doc can.help them.sort their eyes out real soon.
Sent from my C6603 using XDA Premium 4 mobile app
slim207rc said:
Finally someone with a little knowledge.
Don't forget, before a smartphone is released, how long it takes to develop.
The screen isn't poor at all. I feel really sorry for people saying this and hope.that their doc can.help them.sort their eyes out real soon.
Sent from my C6603 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
I don't think they need a doctor or anything, it is a matter of taste, there are people who like viewing screen with oversaturated colors and overdriven contrast just because it is more eye catchy, for god's sake they even ported the bravia engine to the galaxy nexus, and there are people who even enjoy it, if the nexus screen weren't oversaturated enough... let's oversaturate it even more and add a lot of detail loss due to contrast overdrive by BE.
Oh, also forgot to mention, "nits", why the hell would we need a screen with a gazillion of nits if at the end of the day we are all using the brightness bar to decrease it to save battery (or using the Auto mode), at the end we all are viewing the screen with about the same luminosity, it doesn't matter if our screen has 10 or 8.000.000 nits.