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Gif's and Jpg's
JPG’s
- A JPG might compress to a smaller file than a GIF (less time
to download) but it might take longer to decompress and display.
- JPG is a lossy compression format. You lose image quality.
- JPG compression gives the best results for photographs or images
with detail.
- To reduce the size of a JPEG file, apply a small amount of
blurring to the image.
- After the image downloads, compression no longer matters.
GIF things
- Use GIF with drawings or line art work.
- Some versions of Netscape choke on transparent GIFs.
- Fix: make the first pixel in your GIFs non-transparent.
- There is no loss of quality in GIF format..
- GIF images can only show 256 colors.
- To reduce GIF file size, decrease the # of colors used and
make color areas as large as possible.
Animated Images
- Do not use em.
- They make the page load slow - they use big files.
- Animated images may cause the page to load improperly.
- They're distracting and annoying.
- They chew up processor cycles doing animation.
- Runs at different speeds, depending on the visitor's stuff.
- Crashes older browsers.
- If you use animations anyways, limit the number of times an
animation will loop.
Interlaced or progressive images
- Do not use em.
- Irritating
- Hard to tell when the image is done.
- When bandwidth is skinny the image sits half-rendered.
- Intermediate images are sometimes very different from the actual
image.
- It's just another special effect that will soon be boring.
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image tips
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