JPEG to Transparent GIF loses quality, how to avoid?

JS
Posted By
John Sheppard
Feb 24, 2005
Views
722
Replies
4
Status
Closed
Hello,

I have approxamitly 3000 photos in jpeg format which I am in the process of of removing the background from. The reason I want to do this is because I need a white background for print and a blue background for the web. I am wanting to store them in a format where I can easily change the background colour with a script.

The problem is I don’t know what is the best format, when I save them as GIF with a transparent background the quality of the image is very slightly grainy. I can save them as PSD but the file is huge, ie 5mb a peice.

Can anyone suggest what format I should be using?

Thanks you so much for your time even if you dont know the anwer! Thank you
John
Related Tags
how loses transparency

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W
Waldo
Feb 24, 2005
John Sheppard wrote:
Hello,

I have approxamitly 3000 photos in jpeg format which I am in the process of of removing the background from. The reason I want to do this is because I need a white background for print and a blue background for the web. I am wanting to store them in a format where I can easily change the background colour with a script.

The problem is I don’t know what is the best format, when I save them as GIF with a transparent background the quality of the image is very slightly grainy. I can save them as PSD but the file is huge, ie 5mb a peice.
Can anyone suggest what format I should be using?

Thanks you so much for your time even if you dont know the anwer! Thank you
John

Use another format like PNG, that supports both 24 bits color and transparancy.

Waldo
S
SpaceGirl
Feb 24, 2005
Waldo wrote:
John Sheppard wrote:

Hello,

I have approxamitly 3000 photos in jpeg format which I am in the process of
of removing the background from. The reason I want to do this is because I
need a white background for print and a blue background for the web. I am wanting to store them in a format where I can easily change the background
colour with a script.

The problem is I don’t know what is the best format, when I save them as GIF
with a transparent background the quality of the image is very slightly grainy. I can save them as PSD but the file is huge, ie 5mb a peice.
Can anyone suggest what format I should be using?

Thanks you so much for your time even if you dont know the anwer! Thank you
John

Use another format like PNG, that supports both 24 bits color and transparancy.

Waldo

However the 90% of people are using IE, and IE does not support full alpha channel transparency. So it is totally useless.
W
Waldo
Feb 25, 2005
However the 90% of people are using IE, and IE does not support full alpha channel transparency. So it is totally useless.

I didn’t mean the full alpha channel. My IE (v6) displays "normal" transparancy of PNG correctly…

Waldo
L
Larry
Feb 25, 2005
"Waldo" wrote in message
However the 90% of people are using IE, and IE does not support full alpha channel transparency. So it is totally useless.

I didn’t mean the full alpha channel. My IE (v6) displays "normal" transparancy of PNG correctly…

Waldo

Different version of IE do different things, but this may well help. see here:
http://www.phoenity.com/newtedge/png_degradability/

There’s no harm in working to keep the Mozilla community happy. 🙂 http://www.koivi.com/ie-png-transparency/

Also.. let’s help fix it.
http://www.petitiononline.com/msiepng/petition.html
lovely Microsoft will help as per.

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