Messages

1

Cosmo Communicator - General Discussion / Camera

« on: February 25, 2020, 07:51:03 am »

I'm not telling the pictures are bad, but you can safely choose a 6mpx resolution when taking pictures with the Cosmo

Problem is that there is no 6 Mpix resolution available.

5632x4224 is the "native".

Close to 6 Mpix are
3264x2448 (8 Mpix)
2560x1920 (5 Mpix)

So I'm a bit concerned about using either of these in case there will be some interpolation and therefore fuzzying of detail that will happen. Or is there some way to set a custom resolution?

I would go for the 5mpx setting, the 8mpx would fit better with a 32mpx sensor.

2

Cosmo Communicator - General Discussion / Camera

« on: February 25, 2020, 06:38:26 am »

I'll try with the default camera app (provided by Mediatek), it could possibly bypass pixel-binding in good lighning conditions.

3

Cosmo Communicator - General Discussion / Camera

« on: February 25, 2020, 06:26:00 am »

Yes, I confirm the pixel-binding mode. It's surely driver-coded.
As you can see here : https://1drv.ms/u/s!AjXwOsvc6am5i8YAXZ8...t6xfdw?e=It74IG

I took 3 exact same pictures with 3 resolutions and as we can see, the 24mpx pictures are a 6mpx output resampling...
I'm not telling the pictures are bad, but you can safely choose a 6mpx resolution when taking pictures with the Cosmo

4

Cosmo Communicator - General Discussion / Camera

« on: February 25, 2020, 04:34:47 am »

I made a few comparison tests between Cosmo Camera & Key2 Camera and will soon post them here.

- Cosmo has a 24mp Samsung 4/3 Tetracell sensor (S5K2X7), 2.8 aperture size, focal length = 300mm
- Key2 has a 12 mp Samsung 4/3 Isocell sensor (S5K2L9), 1.8 aperture size, focal length = 389mm (a little wider compared to the cosmo)

I perform 3 tests using manual camera modes and using a 4000k white balance. I used the Key2 default camera app as it allows full camera controls (Key2 does not provide Camera 2 API, I can't use manual parameters on any other app) and Open Camera for the Cosmo (Cosmo supports Full Camera 2 API)

- ISO : 100, Shutter Speed : 1/15s
- ISO : 800, Shutter Speed : 1/125s
- ISO : 3200, Shutter Speed : 1/500s

What I observed so far :
- The device color calibration is not the same on both devices. Using the same white balance does not provide the exact same colors on final pictures (I obviously checked the results on a computer)

- Cosmo takes pretty good pictures at low ISO levels. Both devices performs quite equally if ISO < 800.

- At high ISO levels, Cosmo produces weird vertical lines, everything is over-denoised and blurry, more than with the Key2 (hard to tell is that post-processing is done in hardware or software)

- Both devices perform poorly on low-light situations. I suspect the lens to be crap on both devices : a lot of artifacts in low-light make me think about a low-quality lens (ex : the more you go away from the center of the picture, the more you have distorded perspectives and blur starts to appear)

- The Cosmo has a larger focus range : I can take macro-photos and get the focus where the Key2 is unable to focus.

- The Cosmo autofocus is SLOOOOOWWWWW....

Will post some pictures soon.

5

Cosmo Communicator - Hardware / Cosmo lower half teardown procedure

« on: February 20, 2020, 10:58:01 am »

There is also a full teardown with pictures on the FCC regulation website.
Attached here.

6

Cosmo Communicator - General Discussion / Camera

« on: February 17, 2020, 08:54:32 am »

I would like to know the Camera API 2 compatibility mode provided by the driver (full, limited, legacy)
Can someone provide me the information ?

Thank you

7

Cosmo Communicator - General Discussion / Cosmo for sale

« on: February 17, 2020, 08:52:29 am »

Hello !
I PM'ed you