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Photoshop Contest Forum Index - Ask the Experts - JPG2000 - Reply to topic

thbeghin

Location: Paris, France

Post Fri Nov 09, 2007 4:01 am   Reply with quote         


Hello,
I have a picture with no background that i want to put on a website. I saved it in .png to keep the transparancy but it's too heavy (330k). What about jpg2000? Is it better to save transparancies?
Thank you all for your help.
Thierry
splodge

Location: Yorkshire,

Post Fri Nov 09, 2007 4:18 am   Reply with quote         


you could save as a transtaent .gif but you get a 1 pixel rim, i'm sure you already knew that Smile




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thbeghin

Location: Paris, France

Post Fri Nov 09, 2007 4:22 am   Reply with quote         


oh yes, i forgot to say that i don't want to loose quality...
Grefix

Post Fri Nov 09, 2007 5:40 am   Reply with quote         


jpeg2000 is unfortunately not supported (yet) by most browsers (if not all, but not sure of that) (unless you have some plug in installed which can show these)

So I would certainly advise against using it for your site

So unfortunately if you want to keep that transparency to a high level I'm afraid you're stuck with png




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thbeghin

Location: Paris, France

Post Fri Nov 09, 2007 5:47 am   Reply with quote         


Yes Grefix, you're right. Here is what i'm doing now: i re-save my .jp2 in .png: the quality is still acceptable and i'm at 220k.That's better, but still a bit too heavy...
splodge

Location: Yorkshire,

Post Fri Nov 09, 2007 5:56 am   Reply with quote         


i wish i knew what you were doing, i could prolly build the page in flash, great compresion for no loss




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ScionShade

Location: VeniceFlaUS

Post Fri Nov 09, 2007 7:48 am   Reply with quote         


Thierry! It's 2007 almost 2008... 220 is OK NOW!
Granulated

Location: London

Post Fri Nov 09, 2007 8:02 am   Reply with quote         


thbeghin wrote:
Hello,
I have a picture with no background that i want to put on a website. I saved it in .png to keep the transparancy but it's too heavy (330k). What about jpg2000? Is it better to save transparancies?
Thank you all for your help.
Thierry


Hi...have you tried slicing it up...then you can assign higher compression and less dither to areas that can take it...and lower compression and higher dither to areas that need more ?
TofuTheGreat

Location: Back where I belong.

Post Fri Nov 09, 2007 10:27 am   Reply with quote         


ScionShade wrote:
Thierry! It's 2007 almost 2008... 220 is OK NOW!


Depends on where you're at and what the site's criteria are.

Still I would think 220 would be ok. That would take what 4-5 seconds to download on a dial-up?




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vokaris
Site Moderator

Post Fri Nov 09, 2007 10:48 am   Reply with quote         


TofuTheGreat wrote:
Still I would think 220 would be ok. That would take what 4-5 seconds to download on a dial-up?
More like 20-30 seconds on a dial-up (56 kbps = 7 KBps)
thbeghin

Location: Paris, France

Post Fri Nov 09, 2007 11:13 am   Reply with quote         


I think that the re-saving .jp2 and .png is not bad. i'm now at 184k. i'm trying to find the right balance between quality and bit depth.
I will show you when the page is online.
Thanks for your help Smile
TofuTheGreat

Location: Back where I belong.

Post Fri Nov 09, 2007 11:28 am   Reply with quote         


vokaris wrote:
TofuTheGreat wrote:
Still I would think 220 would be ok. That would take what 4-5 seconds to download on a dial-up?
More like 20-30 seconds on a dial-up (56 kbps = 7 KBps)


D'OH! Bad math on my end. Embarassed Laughing

Been a while since I had dial-up. Laughing




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”The mind is like a parachute, it doesn’t work if it isn’t open.” - Frank Zappa
Created using photoshop and absolutely no talent. - reyrey

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