yashsingh1/xdaforums huggingface dataset:
[Xiaomi Poco F1 Questions & Answers] rodrigoxm49:
Could be a lack of calibration, indeed. I noticed that is handling poorly with some lamps and light sources, but we can change for whatever we want on Manual Mode keeping all other settings on auto, except Temperature.

I'm taking outstanding and very precise indoor pictures. Only on my office I noticed that the light source is making the sensor going crazy. Nothing new and I already see it on many others phones with different sensors.

My intention here is trying to not make people that want to buy Pocophone think that indoor picture is ruined or something like that.

It's not. I'm having amazing pictures under these conditions.
[Xiaomi Poco F1 Questions & Answers] 3DRIAN:
The issue that you are talking about shows the limitation of the flourescent lamp as a light source than the sensor as being defective. IF only you have read the links that I have showed in my reply (#24) you'll know what I am talking about and why consumer flourescent lamps were never used in any light-sensitive photography. Your micromax or even the iPhone 4 is no match to the sensor of Poco (IMX363). You drew a conclusion so easily just to justify your preconceived notion that "There is a problem", you basically are ignoring research of your own. Even if I feed you proper links for mind enrichment, you did not bother to read them, why?

By your logic, we could conclude that your micromax and the other user's iPhone 4 is much more capable imaging device than Nikon D90 and Canon Rebel XSI 450d simply because the first two aren't capable on selecting faster shutter speed on the same light source (flourescent lamp). Higher shutter speed will give you better still images on high light conditions but will severely show the flickering of the flourescent lamp, again higher shutter speed is not the issue here but the lamps limitation already showing. This is not even a White Balance issue, if you still insist that then you're just barking on the wrong tree.

Do you want me to feed those links again to you? Here:

https:**photo.stackexchange.com*questions*43026*how-to-correct-yellowish-pictures-under-fluorescent-lighting-on-a-digital-camera#43029

https:**photo.stackexchange.com*questions*4115*do-fluorescent-lighting-and-shutter-speed-create-a-problem-with-color-cast

http:**blog.tommyimages.com*2009*06*photographing-under-fluorescent-lights.html

https:**en.wikipedia.org*wiki*Fluorescent_lamp#Flicker_problems

*replace asterisk with / and remove possible spaces for the links to be usable. I'm sorry.

Please read them. Thank you.
[Xiaomi Poco F1 Questions & Answers] parveshchaudhary:
How about this,

Video 1: https://streamable.com/d0da3

Video 2: https://streamable.com/pj82s

Here you can see the actual difference how the secondary camera is able to handle the scene temperature better.

The way the secondary camera behaves in this scene is how the other camera handles the white balance and how the primary sensor should.

And this is not tricking the sensor as many are saying considering it's a pretty normal indoor scene. And if this is tricking then shouldn't it affect the other sensors as well?

All we expect is to have a neutral color temperature from the primary sensor.

---------- Post added at 01:25 PM ---------- Previous post was at 12:59 PM ----------

Yes, I read those posts and I do understand what you are saying. And I didn't raise any question about the performance of the sensor present in our device I do know it is one of the best smartphone camera sensors out there and even the pixel 3 is equipped with the same.

And yes I do know that I can adjust the white balance by using the manual mode or by editing the images later. But as a consumer what I expect is for the device to adjust automatically and produce a neutral image as it's fully capable of doing that.

I hope these videos make the situation more clear:

Video 1: https://streamable.com/d0da3

Video 2: https://streamable.com/pj82s
[Xiaomi Poco F1 Questions & Answers] 3DRIAN:
By saying white balance means that you clearly didn't read them. Lol. Suit yourself.
[Xiaomi Poco F1 Questions & Answers] rodrigoxm49:
Did you read that change the white balance is enough to "solve" this?
[Xiaomi Poco F1 Questions & Answers] 3DRIAN:
It is not enough to resolve the yellowing by selecting proper white balance when you're using high shutter speeds. You can read the links that I've posted on my previous comments.

Explaination: Even if white balance would be made consistent, taking a picture using a bright light source that uses magnetic ballast flourescent lamp will make the phone to automatically choose fast shutter speed in which will expose the limitations of the light source itself. As we all know lamps does not emit light continuously, they emit them at a specific frequency fast enough to be not be perceived by human eye but can easily be captured by a camera with faster shutter speed. What is being captured to be yellowish (even if you set the White Balance right) is the lower portion of the frequency curve because the camera shutter is fast enough to capture the light even if it is not fully ON or NOT at its peak power yet, thus color yellowing. You can mitigate this by synchronizing the shutter to the frequency of the lamp so that you'll only capture the peak ON state of the lamp. You can read further using the links I provided above which shows the limitation of consumer flourescent lamps especially the old magnetic ballast type.

High frequency lamps were not affected by these such as:

1. Flourescents with electronic ballast.

2. LED lamps.
[Xiaomi Poco F1 Questions & Answers] rodrigoxm49:
Ok, so shutter speed is another thing.
[Xiaomi Poco F1 Questions & Answers] ronald_loulan:
Did you tried gcam?
[Xiaomi Poco F1 Questions & Answers] Fak3-1234:
yes whatever camera app out there it has the same outcome.
[Xiaomi Poco F1 Questions & Answers] 3DRIAN:
Yep, if you really read the articles/pages that I've posted you'll understand that there was no problem with Poco in this case. This phenomenon is also evident to these cameras Nikon D90 and Canon Rebel XSI 450d (which was reported on photostackexchage in my links provided) basically, the light source (flourescent lamp) provides light intensity which is enough to satisfy faster shutter speeds, these cameras has sensors that were capable of even faster shutter speeds for better image quality (again due to the light intensity) but in-return shows the limitations of the light source itself on the image captured.

A differrent focus will also alter the shutter speed. You can test this when taking a picture with yellowing and the one that doesn't, check their metadata and you'll see that they have differring shutter speed. A magnetic ballast flourescent lamp or even a cheap LED light will have a different color output when captured at a different shutter speed range but this is not an issue about having high shutter speed, in fact high shutter speed is always needed for high intensity light source, the issue is about the lamp being the limit as a light source, using slow shutter speed on a very high light source will make the picture overblown or will have trails on moving subjects. This link will explain more about this subject:

https:**photo.stackexchange.com*questions*29830*how-does-aperture-size-or-shutter-speed-affect-color-temperature

- change the * to / and remove any spaces to make the link usable. My apologies for the inconvenience.

People should be more vigilant in this kind of phenomenon, there were lots of research materials in the internet which points the culprit to the light source (magnetic ballast flourescent lamp, low frequency lamp in general) but I don't see the reason why people opts to call this an issue instead of researching the phenomenon instead.
[Xiaomi Poco F1 Questions & Answers] parveshchaudhary:
I don't see this happening here. The shutter speed is the same for both images it's just the ISO that changes and the change in ISO doesn't explain this(As this strange behavior happens even when I shoot with same ISO and shutter speed).

Video : https://streamable.com/befwb
[Xiaomi Poco F1 Questions & Answers] 3DRIAN:
Try making an example using manual. Set the WB to Flourescent and alter the shutter speed accordingly, others just set to auto.

---------- Post added at 02:31 PM ---------- Previous post was at 02:14 PM ----------

I could only make an theory on why this happens. Acknowledging the fact that an electromagnetic ballast flourescent lamp's yellowing on the differring shutter speed, whenever the camera (on full auto) does polling for White Balance (WB) the samples were that of an already yellowing color of from lamp which results to the WB automatically set to Tungsten. This is kind of tricky because human eye can't catch this I think this is one explaination why that your video justifies the yellowing at same shutter speed.

I have another question: what was your wall color and the color of the wall or ceiling your lamp is installed?

---------- Post added at 03:38 PM ---------- Previous post was at 03:31 PM ----------

You can also ignore my examples and just read the links I provided, they can explain more than I did in my comments.
[Xiaomi Poco F1 Questions & Answers] parveshchaudhary:
The issue is with the auto adjustment of color temperature. If I set that manually then I know the image would turn with the tone I set it for.

I think one of the issues behind this is that the color temperature jumps take place by amounts of 200K(saw it in manual mode) there is a need for some intermediate value between these at least in the auto mode in order to produce a balanced image.

Btw thank you for the links and explaining them but unfortunately, that is not the problem what we are facing.
[Xiaomi Poco F1 Questions & Answers] 3DRIAN:
Tackling the Phenomenon

Saying that color casting is NOT the problem on the light source itself is like ignoring the fact that an electronic ballast flourescent lamps do make color casting at a range of a shutter speed. A little skit of what is happening:

1. Asume that everything is an entity that can talk and the user uses auto mode!

2. Camera: Oh it is a flourescent lamp, let's choose flourescent WB!

3. User: Oh good light nice, what I expected. *Changes angle*

4. Camera: Oh, the color changed (due to color casting) let's change to a different WB!

5. User: Fak, why is this yellow!

6. Magnetic Ballast FLourescent Lamp (MBFL): LOL, misson accomplished, tricked the algorithm.

7. Electronic Ballast Flourescent Lamp: (saying in 5KHz) You are a disgrace to our family MBFL! You could not perform well on higher shutter speeds!

8. MBFL: (Thinking at 60Hz or even lower) Wuuut...hihi.

9. Professional Photographer: What? My 2000USD camera does NOT go well with MBFL! Lemme change the WB, a bit of change to shutter speed, BAM! Good photo. Whooo! I'll never use that light again.

10. User: This is clearly a bug!

Yeah sure users can force how the devs to code for auto but we all should know that even Professional Photographer rarely uses Auto and for how long will this get patched? Will the programmers code to nerf their sensors because an aging lamp's frequency is low enough for them to work properly on advanced cameras? If they will, how long can you wait for the full auto implementation?

We all know that as camera sensor capabilities progress yearly, a lamp's technology (made centuries ago) still continues to be the same. If you want to harness the full sensor capability of your phone, change your light source to a high frequency LED, or high frequency Flourescent or better yet use manual without spending additional money on a better artificial light source.
[Xiaomi Poco F1 Questions & Answers] parveshchaudhary:
Let me make a few things clear for you here:

1. The images turn out tinted even when the shutter speed remains the same. (Even when I increase the shutter speed and lower the ISO same issue is present, so it's not about the shutter speed)

2. The source of light in the scene is from a LED Tube Light and not from centuries-old fluorescent lamps (I cannot always carry around a HIGH FREQUENCY LED or upgrade all the lights everywhere just to shoot some casual indoor photo as this issue happens under other lighting conditions as well).

3. It's not tricking the algorithm of the sensor as even the inferior sensors can have better algorithms then so can this sensor.

4. If you say the issue is with the camera sensor(Sony IMX363) then the issue should be there even on Mi8 and Pixel 3(Which is not the case).

5. It's just about adjusting the color temperature. That has to do with the image processing which needs some fine-tuning.

6. Yes, I do know I can always use the manual mode but as a normal consumer, I expect the device to produce a balanced and sharp image even in auto mode. As other devices with the same camera sensor or even inferior sensors can produce balanced images.

If you still cannot understand the problem here then I don't think you ever would.
[Xiaomi Poco F1 Questions & Answers] Fak3-1234:
Stop the long story

Only users have this camera problem will understand what's going on.
[Xiaomi Poco F1 Questions & Answers] 3DRIAN:
Assuming that I didn't understand anything and all my replies were bogus can you teach me how White Balance, Shutter Speed, light frequency and Focus affects the photos? Can you provide some links to further explain what was currently happening under artificial light conditions? Maybe I really am not reading the right articles and just being arrogant on the topic regarding photography. If you can give some enlightenment then I would be willing to be more educated regarding this subject. Thank you.
[Xiaomi Poco F1 Questions & Answers] thomas140:
Baw GOD....Somebody stop the damn match.

[JR]
[Xiaomi Poco F1 Questions & Answers] Lepocha:
I used AZ camera in auto mode this whiteblance issue occurs in that camera app too but strangely there is no fluctuations of wb showing in the app . Everything fluctuates except white balance in auto mode...the wb always shows 6550k but originally it changes...can anyone guess from this what is the main problem for this issue ?
[Xiaomi Poco F1 Questions & Answers] someone1231:
Hi, [MENTION=4143060]Fak3-1234[/MENTION], I have the exact same problem, and I just found a way to "fix" this, u need to download google camera and then choose flourescent temp.

it's not a fix but it's the best way to get rid of that yellow/green tint :)

(i cant post pictures because im a new member)
[Xiaomi Poco F1 Questions & Answers] euvinicosta:
yeah me too

when i first tried pixel's camera in my poco it took photos just like this. i had do change somethings in the configs app so i could take normal pics with my phone.
[Huawei P20 Pro Questions & Answers] Canuckfan101:
Hi I am coming from a. iPhone 6 one of my biggest problems was visibility in sunlight and everyday use. I’ve seen reviews saying this screen is not that good for outdoor use? Anyone using the phone how is quality of display for outside use ?

Thank you!
[Huawei P20 Pro Questions & Answers] gm007:
It's very good you don't have to worry.
[Samsung Galaxy S7 Questions and Answers] jruka:
I have been toolin along just fine and phone was getting a little glitchy and went to clear the davlic thru flashfire and it don't work. Found out its common and unless you had pro previously it's just gone. Is there another app that does the same thing. What are the current options for this phone.... been along time since I was here
[Samsung Galaxy S7 Questions and Answers] jruka:
Also now I can't reroot using the familiar process due to flashfire. I rooted Jan 2017 and have been stable so I am not current on info. What's the latest greatest root guide s7 930a
[Xiaomi Redmi S2 Guides, News, & Discussion] Shiroyasha21:
this one is right command

"fastboot flash recovery twrp-3.2.1-0-ysl.img"
[Xiaomi Redmi S2 Guides, News, & Discussion] Zaid Sheikh:
brother first of all sorry for broken whatsapp group link

now coming to your issue

brother if you only want to reboot into twrp recovery then use this command :-

fastboot boot twrpname.img

and if you want to flash it :-

fastboot flash recovery twrpname.img

if you have xiaomi.eu MIUI rom then it is needed to wipe internel data or you can simply click on wipe data na then type yes .It will decrypt your internel storage only works in xiaomi.eu rom

and if you wipe data on other roms like golbal beta or stable then it will not decrypt your internel data .
[Xiaomi Redmi S2 Guides, News, & Discussion] Shiroyasha21:
ok I'm understand
[Xiaomi Redmi S2 Guides, News, & Discussion] Zaid Sheikh:
yes u r right but you have to wipe data first
[Xiaomi Redmi S2 Guides, News, & Discussion] RealAkito:
As the proper owner of this guide, He just copied without PM or permission

Edit : He gave proper credits now.
[Xiaomi Redmi S2 Guides, News, & Discussion] batthsahej:
Zaid shaikh all links are revoked plz contact me= 8847291484 i want to root my phone urgent please
[Xiaomi Redmi S2 Guides, News, & Discussion] sumit17:
There is another thread. Find it.
[Xiaomi Redmi S2 Guides, News, & Discussion] milan1984:
After unlocked bootloader and enter following command

PS C:\Users\amiku\Desktop> fastboot boot ysltwrp.img

downloading 'boot.img'...

OKAY [ 0.738s]

booting...

and it stays like that forever
[Xiaomi Redmi S2 Guides, News, & Discussion] Baim alif:
vol up + power button will boot to recovery
[Xiaomi Redmi S2 Guides, News, & Discussion] milan1984:
Yeah, I know that, i fixed it with flashing twrp, just wanted to try without flashing custom recovery only booting for couple of times.
[Xiaomi Redmi S2 Guides, News, & Discussion] milan1984:
Yeah command "fastboot flash recovery ysltwrp.img"

fastboot reboot

power+vol+
[LG K20 Plus Guides, News, & Discussion] robnew:
Instructions on installing Kali NetHunter for the LG K20 Plus. (MP260)

This is a modified LineageOS 14.1 arm64 Kernel modified for use with the Nethunter although its should work for any ROM.

I am going to assume that your device is rooted and has TWRP installed. Also since this is an arm64 kernel, you will most likely need to have a custom ROM installed. I am using AICP "aicp_lv517_n-12.1-UNOFFICIAL-20180216". You can download it from this thread https://xdaforums.com/note-4/snapdragon-dev/rom-aicp-12-1-t3592312.

Once you have that done, Make sure you download the nethunter-generic-arm64-kalifs-full-rolling-3.15.4-20170211-0304.zip and then download the kernel I compiled from my github.

https://github.com/robnew/NetHunter_K20plus_Kernel

Flash them both from TWRP and you should be good to go.

THE KERNEL

The NetHunter kernel for the LG K20 Plus is based on the LineageOS 14.1 [LV517] kernel sources.

•SELinux enforcing, switches to permissive when requested by NetHunter app

•Enabled USB (OTG) Atheros, Ralink, and Realtek WiFi drivers

•FIOPS IO scheduler as default IO scheduler, SIO available

•DriveDroid compatibility

•USB HID Gadget keyboard & mouse support (HID Attacks, Duckhunter HID Attacks)

•mac80211 packet injection support

•Additional drivers built in for the full Kali NetHunter experience

•Data partition encryption optional (may not be supported by custom kernels - encrypt at your own risk)

•Kernel module support, insert your own modules! (modprobe available in Kali chroot)

•CIFS, NFS available through included kernel modules

Enjoy.
[LG K20 Plus Guides, News, & Discussion] Bigjohnvancil:
Hello

Hey I am pretty root savvy but just got a phone able to have nethunter kernal I mainly want it for hid keyboard but I can figure out what build to download I can't find any that say lv517 they say Shamu and hammerhead etc. So I was wondering if you could help me find the kernal or a hid kernal I am using the LG mp260 I am on lineage 15.1 I have twrp. I downloaded master zip at GitHub but when I tried flashing it said md5 checksum error if I am leaving out any info I apologize any help would be greatly appreciated

---------- Post added at 11:41 AM ---------- Previous post was at 11:31 AM ----------

Sorry 14.1 I ment 7.1.2 is my version my model is LG k20 plus lineage version 14.1 lv517 20180114 (weird that's my bday lol) hope to here back
[LG K20 Plus Guides, News, & Discussion] robnew:
Make sure you download the nethunter-generic-arm64-kalifs-full-rolling-3.15.4-20170211-0304.zip from the Nethunter Repository and then download the kernel I compiled from my github. github.com/robnew/NetHunter_K20plus_arm64_Kernel. Flash them both from TWRP and you should be good to go. Make sure you are running 64bit Rom. Good luck. Let me know if you have any issues.
[LG K20 Plus Guides, News, & Discussion] phonecapone:
Awesome work. I will have to give it a try.
[LG K20 Plus Guides, News, & Discussion] Colt5775:
Hey this kernel does not support postgresql in nethunter there is an error about memory segmentation fault. Is there a way to fix this?
[LG K20 Plus Guides, News, & Discussion] robnew:
Postgresql works fine for me. I am running it as the back end for MetaSploit. What Rom are you running?
[LG K20 Plus Guides, News, & Discussion] kieffey:
buggy kernel

I've managed to get nethunter pretty much all set up but it seemed like every time I flashed the kernel I would be stuck in a boot loop. anyone got anything on this?
[LG K20 Plus Guides, News, & Discussion] robnew:
64Bit

Make sure your using a 64bit ROM like RR or AICP. There are both 32 and 64 versions of these. I have uploaded a newer kernel to GITHUB with support for more wifi cards. Let me know if this helps you. Also what is the model number you are using?
[LG K20 Plus Guides, News, & Discussion] kieffey:
lg k20 tp260

64 bit pbrp , 64 bit lineageos 15.1
[LG K20 Plus Guides, News, & Discussion] robnew:
I just tried out the Unofficial LineageOS 15 and the Kernel is not working for me either. I know it works fine on all the 7.1 ROMS. I will work on a new kernel designed for Android 8.1. Not really sure what is different yet.
[LG K20 Plus Guides, News, & Discussion] kieffey:
Thank you I look forward to trying it out asap
[LG K20 Plus Guides, News, & Discussion] mariobob:
Wich zip file from GitHub do we download?
[LG K20 Plus Guides, News, & Discussion] Travisholt92:
Base it on my 9.0 kernel on github
[LG K20 Plus Guides, News, & Discussion] ecompton59:
Thanks for the work I'm going to try noe
[LG K20 Plus Guides, News, & Discussion] llib01:
Hi thanks for continuous hard appreciated work.

Question did you get this working with the lineage Os 15.1 ROM the kernel part I mean?

Last question is the ROM you have posted here better than lineage one I'm using for this phone like in options or speed ,mods ,etc..

Please everyone do not take anything in wrong terms. All of everyone's work done I respect and appreciate and thank them all including XDA
[LG K20 Plus Guides, News, & Discussion] GXDA3:
USB storage device not mounting with this kernel... No devices detected. I've tried stickmount and still the same thing... Can anyone please help? I've already ordered the WiFi adapter and I hope its going to work...
[LG K20 Plus Guides, News, & Discussion] GXDA3:
Does this kernel not support native usb otg? I can't get it to read my usb flash drive with an otg cable it wont even read it... no option to mount?
[LG K20 Plus Guides, News, & Discussion] robnew:
The kernel is a modified lineageOS 14.1 kernel. The only difference is that mine supports the nethunter tools like HID attacks and external USB WiFi cards.
[LG K20 Plus Guides, News, & Discussion] Keskebeu:
No rtl88xxau kernel modules

I have used all the methods and yours was the last method and I am telling you it does not work for the rtl88xxau. I am trying to have this build within the kernel and I have done anything so far but not successful. The modules you have compiled are the ralink which you describe. I am having trouble building a kernel. I am trying to build a kernel with the drivers or rtl88xxau available but I am getting stuck at some point. Can you please tell me what version of linux os have you used to compile the kernel. I am trying to compile the kernel for the cm 14.1 with the rtl88xxau. thank you.