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Home > Cell Phone Forums > Manufacturers Talk > Nokia Talk > How to adjust color for best image quality?

How to adjust color for best image quality?

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mersink
Antenna Booster Novice
Posts: 2

Phone Model:
7210
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Thu Nov 27, 2003 12:46 pm 
Hi... i'm trying to make my own wallpapers by cutting and resizing pictures with adobe photoshop. But my wallpapers are never as quality as those ones published on this site. They are great on my computer but when i upload it to my nokia 7210 they doesn't seem like i wish. How do you guys make wallpapers? Thanks a lot...
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abhishta
Super Mod
Posts: 995

Phone Model:
Moto Mpx220, Nokia 6800(backup)

Service Provider:
T-mobile
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Thu Nov 27, 2003 1:28 pm 
What format are u uploadin them in??
Upload them in jpeg format at highest quality.
For .gif, the quality is not as good.

mersink
Antenna Booster Novice
Posts: 2

Phone Model:
7210
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Fri Nov 28, 2003 2:05 am 
I'm already uploading them in jpeg format at highest quality, bu i think the problem is the high quality itself. These pictures are more than 4096 colors. There must be a way to adjust color. Is there a profile that created for nokia phones ?

Dust_
3D Hologram Enthusiast
Posts: 15

Phone Model:
SGH-S500

Service Provider:
still with Singtel.
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Fri Nov 28, 2003 10:48 pm 
for 7210, since it has a resolution limit of 4096 colours, its best to avoid using high quality photographs as wallpapers.

What i did for my 6610 previously was to use .GIF files..

The reasoning being that .GIF files can only support a maximum resolution of 256 colours.. therefore, if a picture looks good after being converted to .GIF, then it will also look nice on your 7210.

Bjoern
Gunnery Sergeant
Posts: 3611

Phone Model:
Nokia E61

Service Provider:
o2 Germany
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Sat Nov 29, 2003 5:31 am 
Which "color-modes" are used?
8bit (256 colors)
16bit (65.536 colors)
32bit (4294967296 colors)
(sometimes 24bit (over 16,7 million colors); like in Jasc Paint Shop).


Colors are counted in bits.
8bit = 2^8 = 256
(2 to the power of 8 )

So you need a tool, which converts the colors to 12bit (4096 colors).
I don't know any tool, which can do that. Or even heard about something like that.

Most phones have got a display with 128x128 pixel, which are 16384 pixel which is 14bit (2^14); cheaper ones have got 96x65 pixel which are 6240 pixel (or nearly 12,6074bit icon_biggrin.gif ); Symbian OS phones have got 176x208 pixel (something over 15bit icon_biggrin.gif )

But the decreasing of colors has its benefits. Saving memory!
And mostly you won't see a difference between 8bit and 12 bit. Maybe on your computer display, but not on the phone.

There are some pictures, which are never displayable on phone with only 12bit.
Like a picture with many colors which had a smooth transition. The phone couldn't display the smooth transition of colors right due to the color-limitation so the picture looked like crap on the phone.
Once we had a discussion about a picture of some clouds which even wasn't displayable even as gif, bad colors.
elmimmo
Antenna Booster Novice
Posts: 2
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Sun Mar 13, 2005 3:19 pm 
mersink wrote:
Is there a profile that created for nokia phones ?
I couldn't find a color profile on the net which would reduce the images to 12 bit and compensate gamma, white, black etc.

Still, there's the free Photoshop filter (maybe compatible with cheaper software such as IrfanView or PaintShopPro) at http://www.telegraphics.com.au/sw/ to convert your images to 12 bit. At least you'll be able to control wether you want to dither or not rather than let the phone decide. Using it to go down to 4096 choosing "no dithering" is quite useful for cartoony images to be used as background, for instance.

. . .
Radiation Shield Addict
Posts: 143

Phone Model:
Now: Nokia 6230 Previosuly: [first is most recent] Nokia 8310, Nokia 3310, Ericsson T10

Service Provider:
Singtel
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Sun Mar 13, 2005 9:11 pm 
im lucky since i have a 65K colour fone 6230..i make images using adobe photoshop also...on the fone, it looks a bit duller..so what i did was to increase the contrass of the image on photoshop..it will look weird on the computer because it'll look too bright but now on the fone, it looks nice and bright..maybe u could try to increase the colours too?? i dunno...thats what i did.
elmimmo
Antenna Booster Novice
Posts: 2
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Tue Jun 07, 2005 6:35 pm 
f13ry-4lt1s wrote:
im lucky since i have a 65K colour fone.
In that case, you might be interested in trying another one of the free plug-ins by Telegraphics, "5_6_5 Filter", which reduces an RGB image to a color palette of 65536 or 32768 colors.

Check out at http://www.telegraphics.com.au/sw/
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