Best format for web images

  • Chaosphere
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Post 3+ Months Ago

Hey wahts the best format for web images.... i need some big images to dl reallty fast, any info or links on image formats and their plus minus's would be nice :)
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Post 3+ Months Ago

  • Axe
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Post 3+ Months Ago

There is no "best format" as a general rule for images.

"Best Format" depends on the image itself.

If it's just a 2 or 3 colour line drawing, then GIF is the way to go.

If it's a photograph with 100,000 different coloured pixels and lots of busy action, then use JPG.
  • Geekette
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Post 3+ Months Ago

Don't forget about PNG! While they are slightly larger than JPGs, the quality is great!
  • Axe
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Post 3+ Months Ago

Oh yeah, PNG is great for actually showing off photos, where quality counts. Also, PNG supports alpha transparency (although, I'm not sure if IE supports the transparency if you call a PNG file in an <img> tag).
  • digitalMedia
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Post 3+ Months Ago

It does, with the right javascript. :)


*** and a jpg and png can both achieve all the visual quality you'd ever need.
  • musik
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Post 3+ Months Ago

I've never used png files before, can everyone view them if you use them on a website?
  • ATNO/TW
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Post 3+ Months Ago

We've already had one very good conversation about png files here:
http://ozzu.com/digital-art-forum/compatibility-portable-network-graphics-png-t1186.html
  • conorific
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Post 3+ Months Ago

Yes, they can, except for really old versions of Nutscrape and such. Oh, I mean, Netscape. Sorry.

http://www.xentrik.net/graphics/formats.php That tells you about what formats are good for what.


Quote:
...most of the latest versions of the major browsers fully support alpha transparency with png—namely, Netscape 6, Opera 6, and recently-released Mozilla 1, all on Windows; and, for the Mac, Internet Explorer 5, Netscape 6, Opera 5, Mozilla 1, OmniWeb 3.1, and ICab 1.9. Incredibly, png even works on Opera 6 for Linux, on WebTV, and on Sega Dreamcast.


I think I found that on a news release somewhere. Forgive me, I don't remember. That was written in May 03 so I think there's later versions, but they obviously support it.
  • musik
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Post 3+ Months Ago

Thanks for the link ATNO! :D
  • Chaosphere
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Post 3+ Months Ago

Thanks all, I am just working on a portfolio website....so i need to put my art on it :) I am making a really simple flash site for now...i am not advanced at flash :( but i want my work up, so in the future i will certainly be on these forums a lot :P and haunting all of you with rediculous questions :shock:
  • musik
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Post 3+ Months Ago

Chaosphere wrote:
Thanks all, I am just working on a portfolio website....so i need to put my art on it :) I am making a really simple flash site for now...i am not advanced at flash :( but i want my work up, so in the future i will certainly be on these forums a lot :P and haunting all of you with rediculous questions :shock:


No such thing as ridiculous questions. No matter how stupid I feel I always ask it, because that's the only way to learn.
  • Axe
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Post 3+ Months Ago

Oh, there are such things as stupid questions... like..

"Hi, I run NASA. Should I use Windows to power the next shuttle into space?"

But those kinds of questions are very very rare ;)
  • musik
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Post 3+ Months Ago

good onya :lol:
  • ATNO/TW
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Post 3+ Months Ago

Axe wrote:
Oh, there are such things as stupid questions... like..

"Hi, I run NASA. Should I use Windows to power the next shuttle into space?"

But those kinds of questions are very very rare ;)


Mr. Bush just gave NASA an extra billion a year for the next 5 years. Why is this a question? *lol
  • Axe
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Post 3+ Months Ago

An extra billion huh?. That should cover at least a coupla dozen Win2003 server licenses ;)
  • digitalMedia
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Post 3+ Months Ago

Dude, it's government procurement for goodness sakes. They'll end up with 2 Amigas. One for the vehicle, one for mission control.

hahaha
  • rjmthezonenet
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Post 3+ Months Ago

Traditional file formats are GIF and JPEG.

GIF files are limited to a 256 colour indexed pallet. One colour may be set as a transparency. The compression method for these files is non-lossy and best suited to images to areas of the same colour (eg. clipart, logos, icons). Transparent GIFs will only work against solid backgrounds of a pre-determined colour. For example, a GIF set to be transparent over white will have a halo effect of dithered pixels when placed over black.

JPEG files may have millions of colours is a 24-bit format. If you reduce the bit depth, smaller sized files are available at the expense of the number of colours. JPEG files do not support transparencies. JPEG files have an excellent compression algorithm. Although somewhat lossy, 10:1 compression savings are common (compared to raw or non-compressed TIFF images).

Both GIF and JPEG support progressive downloads, but the JPEG format is not well supported.

I don't think GIF or JPEG files can store a colour profile (used for consistent colours on different computers, monitors and operating systems).

PNG is a 24-bit (millions of colours) replacement for GIF. Since it is not patented, most open-source programs favour this format. It supports an alpha layer transparency which allows for perfect transparencies on any background.

I don't think it supports progressive downloads. File sizes tend to be twice as large as GIF images and ten or fifteen percent larger than JPEGs (guessing). <== Would someone on this forum like to test those assumptions.

It is well supported by IE5+ and NS7+.

This file format is suitable as a replacement for GIF and JPEG.

SVG is a format for vector art. If preserving your vector artwork, or generative large dimension images in a small size, is important. This format is for you. I think a plug-in is required...

Does this help?
  • Chaosphere
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Post 3+ Months Ago

thanks again all....

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