Re: Import format BMP or JPEG??

[Geoffrey J. Swenson]

Andrea Evora Cals wrote:

> 

> I always  import JPEGS

> I don't know the difference, but they look the same when imported.

> So, I prefer the compressed one.

> 

Both .BMP and .JPG bitmaps are compressed. But .JPG uses "lossy"

methods that work great sometimes, but if the bitmap has

large areas of solid colors, the .JPG format will cause really

annoying artifacts.


The nice thing is that the non-lossy methods used in .BMP .GIF, 

and compressed .TIF are VERY good for solid-color images that 

aren't handled well by lossy mechanisms as they "tokenize" 

nicely and have very  high compression levels. And since they are

NOT lossy, you never get artifacts.


So the limitations of the two formats are rather complementary,

so you can compress almost anything by choosing the format that

works the best for any particular image.


But you cannot say one is better than the other.


-- 

Geoffrey J. Swenson

technoGRAPHIC Solutions

geoffreynwlink [dot] com

http://www.nwlink.com/~geoffrey/resume/res_wel.html



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