How did you reach this conclusion? Most likely explanation for any differences is that the desktop and video player do dithering, while the photo gallery (for some reason) does not. Try taking (lossless) screenshots of a color gradient on both and compare those.

No, all that shows is that the dithering on the desktop is far better than that in the image viewer (to the point where you can't see the any effects). You'd need to get a screenshot of that image, load it into a decent photo editor, and get a count of the number of different colour values (and that assumes that the screenshot is taken from the display post-processing).

Did downlaod the video that I mounted to test? http://rs465.rapidshare.com/files/37...test_Video.zip
This video is in 32 Bit Color

Image to 32 bits in color http://talk.maemo.org/attachment.php...1&d=1269562974.

See the difference! Take the quiz! Rotate Video in Windows Setup in 16bits

Then rotate Player Of The Nokia N900.

Soon after, Turn Video On PC With Windows running on 32bit!

The Comparable is that the video running on 16 bit Windows, you become like the image appears in the photo gallery of the N900.

And when we shot the video in Windows with 32bit, It is identical to the Video Video Player running on the Nokia N900. And the identical image appears on the Desktop Do N900.

Thus we conclude that the N900 generates images with more than 65K colors! No doubt!

No, we can conclude that dithering in 16-bit windows is poor, which is unsurprising as there's probably near-enough zero people who've ever used it. Anything else is still supposition.

Curiosity! I did a test using the Nokia 5800, it displays the image in your gallery with a definition of colors higher than in the N900!

nokia 5800 in the image Appears in 32bits!
The same image as the Nokia N900 appears in 16bits!

How do not understand how powerful a device Nokia N900, shows photos in only 65K (16bit) colors!

While the Nokia 5800 Display Images in 32 bits, or near!

Here we go again... There is no such a thing as 32bit color depth on a monitor. None! Zip! Nada! Please, educate yourself: HERE.

Nice haiku!

Didn't understand a thing unfortunately

Note that there's indeed a chance the media player uses a greater depth (the _media_ player, not the photo gallery nor the desktop background since both use the sgx).
I'd still like some kind of image I could use to test if the output is 16 or 18bpp.
I have quite a few things (let's say knobs) to test but as I said I have no way to tell if the actual output is 18bpp or the system is just lying to me.

http://www.nokia.ro/produse/cautare-...i#hardware-dui
nokia.ro romania
and
http://www.nokia.fi/tuotteet/kaikki-...e#hardware-dui
nokia.fi FINLAND

The Nokia Finland link translated to English:

http://translate.google.com/translat...ui&sl=fi&tl=en

Short answer, nope, it doesn't work - or at least it didn't for me. You'll end up in the good old endless reboot cycle : (

You probably don't want to be doing that.