Samsung M610 Color Depth = 18bit?

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James Lerch - 17 Feb 2007 17:41 GMT

Greetings

I've got a new Samsung M610 phone. All things considered it's not so
bad, but I have a question. The data I've gathered indicates it has a
240x320 262144 Color TFT Screen. I'm guessing 262144 color = 18bit =
6bit each for red/green/blue (yes??)

For the most part the device displays a normal jpg with reasonable
accuracy, but I have a few sunset pictures that show obvious banding
from color depth reduction.

Is there any software out there that will create 18 bit color images
from 24 bit images? I've tried several programs, and here are the
only options I seem to find:

Decrease or Increase color depth to:
002 colors (1 bit)
016 colors (4 bit)
256 colors (8 bit)
32K colors (24 bit)
64K colors (24 bit)
16M colors (24 bit)

Is there a program that can crate 262K color (24 bit) images? (I'm
assuming that the 32k / 64K 24bit images throw away the unused
bits..??)

Anyway, thanks for your time.

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Take Care,
James Lerch
http://lerch.no-ip.com/atm (My telescope construction,testing, and coating site)
http://lerch.no-ip.com/ChangFa_Gen (My 15KW generator project)

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Education will not; the world is full of educated derelicts.
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punitv@gmail.com - 17 Feb 2007 19:08 GMT

On Feb 17, 12:41 pm, James Lerch <jle...@tampabay.no-spam-
seeds.rr.com> wrote:

> Greetings
>
[quoted text clipped - 36 lines]
> Education will not; the world is full of educated derelicts.
> Persistence and determination alone are omnipotent. "

Hi James,

I'm not sure, but I think photoshop might be able to do that. Anyway,
I too have noticed that there is a reduction in picture quality when
setting up an image as a wallpaper. I think this might be a bug.
When I view a 320x240 picture in the picture viewer (for pics stored
in the phone itself, I think the images appear better for some
reason), the pictures look great--colors vibrant, with no added
compression artifact. When I set the same picture at a screensaver
(using the assign to.. function), you can immediately see a drop in
the picture brightness, color saturation, and sharpness of the image.
It's as if the phone does some further processing/compression of a
picture which I've already optimized for the phone in the first
place. You can see the difference pretty easily if you view the
original expanded image in the picture viewer, and press the "end"
button and see the same image after it's been assigned--it looks like
a drastic reduction in picture quality. I had a toshiba vm4050 phone
prior to this with the same QVGA 262k color display, but it displayed
the screen saver images beautifully.

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