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- |rBut what GOOD ARE FRACTALS?|w
-
- Good question! The behavior of fractals is
- not yet full understood. The more we study
- them, the more we understand the concept
- of |rCHAOS|w of which fractals are an
- excellent example.
-
- Of all their uses today, perhaps the one
- with the most promise is |yFractal Image
- Compression.|w
- Basically, the theory behind it is the
- same as behind any other fractal- |ydetermine
- a set of rules, that, when repeated,
- create a picture that looks like something.|w
-
- To get a picture of anything recognizable,
- (say, a human face)
- you would obviously need hundreds or
- thousands of different rules.
- The good news is that you could store
- |rMILLIONS of rules|w with the space taken
- up by most images.
-
- Modern Fractal Image Compression can achieve
- |r50:1|w to |r300:1|w compression on most images.
-
- Images compressed with fractal compression have
- other advantages as well. They can be blown up
- with minimal loss of detail, in fact, they often
- appear much better than the |gSOURCE|w image when
- blown up!
-
- |gCheck out the following demo of fractal image
- compression.|w
- The source image was a 16.7 million color
- 320x200 graphic. It was |r192,000|w bytes in size.
- The fractal output file was only |r23,000|w bytes,
- an 8:1 ratio with no change in quality (in
- fact, there was an improvement!)
-
- You will see the original graphic, followed by
- the fractal compressed one. Try to see if there
- is a noticeable difference.
- |a(Note: Both of these graphics had to be converted
- to 256 colors for display. This conversion
- lost FAR more image quality than the fractal
- compression)|r
-
- @Press [ENTER] to view...
- ~fexp.pcx
- ~fexpcomp.pcx
- |ySee any difference?|w Not much!
-
- The biggest use of fractal image compression today
- is in two areas: Multimedia programs, and the
- |rINTERNET.|w The well known encyclopedia |yMicrosoft
- Encarta|w uses fractal image compression to squeeze
- what would be an multi-CD program onto 1 compact
- disc.
-
- On the Internet, it takes |rFOREVER|w to download
- graphics with the speeds of most |gmodems|w. Fractal
- image compression promises to help eliminate this.
-
- Both of these uses have the advantage that their
- graphics are |yrelatively small|w compared to the size
- of the screen, not |yfull screen|w like these examples.
- This helps to wash out any loss of detail that
- would be obvious when viewed at full screen.
-
- Fractal images also have the advantage of being highly
- |rSCALEABLE|w which means you can blow them up without
- loosing much detail. The |gfractal algorithms|w are simply
- |yiterated|w more times.
-
- Look at this example. The first picture is the normal
- intro screen zoomed in on the letter 'E' in experience.
- The second picture is the |rfractal compressed|w version
- zoomed in on the same place.|r
-
- @Press [ENTER] to view them...
- ~fexpb.pcx
- ~fexpbfrc.pcx
- |yWhich one looked better?|w The second if you ask me!
-
- And yet the file is 1/8 the size of the other!
- How does it hold so much more |gDETAIL?|w
- The |rsecret|w lies in that wonderful little world
- of |rFRACTAL|w geometry!
-
- @Press [ENTER] to return to menu...
-