FORUMS

Analysis & Opinion

Top Forum Discussions

Front camera issues on some phones (Results of detailed testing)

222 posts
Thanks Meter: 50
 
By cheema, Senior Member on 31st October 2011, 02:18 AM
Post Reply Subscribe to Thread Email Thread
First of all let me say that my only reason for conducting these tests is to bring attention to any issues I find, so that they can be addressed by Samsung and T-Mobile. I am just the messenger, don't shoot.

If you have not seen the results of my display tests for this phone, I encourage to you to check them out here:
http://forum.xda-developers.com/show....php?t=1320942

I conducted the following tests with 4 phones. 2 Sprint Galaxy S II phones and 2 T-Mobile Galaxy S II phones. Now let's see how our phone compares with the Sprint phone when it comes to the front camera.

1. Front camera test using DSLR

For this test I borrowed some data from my earlier display test. All 4 phones were switched to front camera and the camera settings were reset to default. I then put the phones down on a table and took a picture with my Canon 60D.



Needless to say, this looks really really bad for T-Mobile sets. This is the test that gave me the idea that something else was going on here in addition to the well known screen problems of the T-Mobile/Telus phone. As we will shortly see, the T-Mobile phone is suffering from a double whammy of screen and camera problems in this test.


2. Low light test

For this test I lined up some random objects on the floor and took pictures using all 4 phones. The room was lit by one CFL bulb, pointed in the opposite direction of the objects being photographed. The camera settings were reset to factory settings. I used the 2-second timer to take pictures from the front camera. The EXIF data on all the pictures is identical. Please keep in mind that this test used jpeg data from the phone camera. And the screen defects played no role. Full size, un-edited pictures are available if you click on an image below.

Camera maker : SAMSUNG
Camera model : Sprint: SPH-D710 T-Mobile: SGH-T989
F-stop : f/2.8
Exposure time: 1/8 sec.
ISO speed : ISO-400









3. High light test

For this test I repeated test 2 above. But opened up the curtains to let the light in from outside and pointed the CFL bulb towards the objects being photographed.










Conclusion

And the parade of tears continues. Like the display, the front camera loses the battle badly. The hardware is supposed to be identical. Why does the T-Mobile continue to perform poorly? Was the QA team sleeping at the wheel?

The low light test probably needs no analysis. It is easy to see that the pictures from the T-Mobile phone are just plain dark. In the bright light test, if one is not paying attention it would be easy to overlook the washed out colors in the pictures produced by the T-Mobile camera.

I'll continue to update this post as additional data on the performance of front facing camera becomes available.
Last edited by cheema; 31st October 2011 at 09:14 AM.
The Following 6 Users Say Thank You to cheema For This Useful Post: [ View ]
 
 
31st October 2011, 02:21 AM |#2  
HRodMusic's Avatar
Senior Member
Flag Seattle
Thanks Meter: 267
 
More
man im getting very disappointed with my phone, tmo users always getting the short end of the stick..
31st October 2011, 02:22 AM |#3  
manekineko's Avatar
Senior Member
Thanks Meter: 229
 
More
Wow, this is really eye-opening. I'm assuming you wiped off the lens on both phones before the tests? The T-Mobile one almost looks like it's shooting through a haze.

Also, has anyone done a comparison on the rear-facing cameras?
31st October 2011, 02:24 AM |#4  
phewizzo's Avatar
Senior Member
Flag New York City
Thanks Meter: 118
 
More
Both phones have the same parts... Just different processor. Im really starting to believe its a software issue.

Sent from my SGH-T989 using xda premium
31st October 2011, 02:26 AM |#5  
talltexan's Avatar
Senior Member
Thanks Meter: 54
 
More
Dont forget to thank this guy for his hard work WOW. Still trying to get someone with some followers to voice a concern about this.
The Following User Says Thank You to talltexan For This Useful Post: [ View ]
31st October 2011, 02:27 AM |#6  
Authority's Avatar
Junior Member
Flag Salt Lake City
Thanks Meter: 0
 
More
I noticed this a little too, but I totally overlooked it.. I will probably never use the front facing camera on any device... But it does both me that t-mobile devices are worse quality... Might as well purchase it at walmart

I seriously think I am going to side step to the Galaxy Nexus when it is available, mostly for the screen issues on Tmo GS2...
Killbynature
31st October 2011, 03:07 AM |#7  
Guest
Thanks Meter: 0
 
More
Well first of all no need for a separate thread for this ffc for all phones are crap. Second of all you need more precise test. Like see if Samsung and T-Mobile are using the Same screen manufacturer. You can see this by typing dsmeg. In terminal emulator. You have to remember that you have tested I say about 7-8 devices. Not all of them. Xda is about 1% of a total population that has Samsung galaxy 2

---------- Post added at 10:07 PM ---------- Previous post was at 09:50 PM ----------

Quote:
Originally Posted by phewizzo

Both phones have the same parts... Just different processor. Im really starting to believe its a software issue.

Sent from my SGH-T989 using xda premium

SuperCurio the developer for voodoo screen tuning said this himself. We are missing the MdNie chip for processing the screen due to the chipset switch. Meaning Hardware.We emulate the chip in our phones using the Qualcomm MDP. Like i said it may can be fixed by getting better emulation software and samsung reworking the drivers for optimization for the screen. The closest update we have is the wifi calling update which will probably bring various bug fixes as well for the samsung galaxy s2.
31st October 2011, 03:17 AM |#8  
Senior Member
Flag Melbourne, FL
Thanks Meter: 132
 
Donate to Me
More
I've done some video chat over Skype in the last few days and this has been the best front facing camera that I have ever used. People have noticed a much clearer and smoother image from the SGS2 FFC than from the 3 different PC webcams that I use. I don't know much about the Sprint version, but I've been very happy with ours.
The Following User Says Thank You to Splaktar For This Useful Post: [ View ]
31st October 2011, 03:21 AM |#9  
phewizzo's Avatar
Senior Member
Flag New York City
Thanks Meter: 118
 
More
Hopefully they will release an update to fix it...

Sent from my SGH-T989 using xda premium
31st October 2011, 04:47 AM |#10  
OP Senior Member
Flag Portland, OR
Thanks Meter: 50
 
More
Quote:
Originally Posted by phewizzo

Both phones have the same parts... Just different processor. Im really starting to believe its a software issue.

I have the same opinion.
31st October 2011, 05:24 AM |#11  
OP Senior Member
Flag Portland, OR
Thanks Meter: 50
 
More
Quote:
Originally Posted by Killbynature

Well first of all no need for a separate thread for this

We are talking about two separate issues here. You can use the camera to take a picture and analyze on a separate studio display. The phone screen does not play a part here. And any defects with the screen should be discussed separately.

Quote:

ffc for all phones are crap.

If all FFCs are crap then how come the Sprint Galaxy S II is taking better pictures with the same camera hardware?

Quote:

Second of all you need more precise test. Like see if Samsung and T-Mobile are using the Same screen manufacturer. You can see this by typing dsmeg. In terminal emulator.

It is easy to sit back and point fingers at the data that somebody put a lot of effort to produce. It identifies problems in this device so that they can be fixed. Samsung, T-Mobile and much of user community of this phone are oblivious to these issues.

What you say here is irrelevant and absolutely does not matter. The question I set out to answer was:

"Does the front camera on T-Mobile Galaxy S II take better or worse pictures than Sprint Galaxy S II". I answered that with my research and shared the results with everybody else.

You are very welcome to run your own tests and share the results with us. Additionally if you are going to ask others to go on wild goose chases for you, perhaps you should attempt to meet them halfway. I am assuming that you have the same T-Mobile phone as I, you can parse the dmesg as well as anybody else. Tell us what screen we are using. And we'll go from there.

Quote:

SuperCurio the developer for voodoo screen tuning said this himself. We are missing the MdNie chip for processing the screen due to the chipset switch. Meaning Hardware.We emulate the chip in our phones using the Qualcomm MDP. Like i said it may can be fixed by getting better emulation software and samsung reworking the drivers for optimization for the screen.

And how did you connect mDNIe to the front facing camera? I am not saying that it is not relevant, but I am curious to know if you have any real information connecting the two or if you are spouting nonsense again.

Read More
Post Reply Subscribe to Thread

Guest Quick Reply (no urls or BBcode)
Message:
Previous Thread Next Thread
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes