[comp.sys.mac.hypercard] HyperCard image compression algorithm

radford@calgary.UUCP (Radford Neal) (12/09/87)

Hypercard is said to use a very good method of compression 
images. Does anyone know details on this?

   - Does it work on bit-map images only? MacDraw-style pictures?
     Mac II color images?

   - How much does it compress the image? This may vary depending
     on whether we're talking about a simple pie chart or a digitized
     photograph.

   - What exactly is the algorithm?

I'm interested in this from a general data compression viewpoint, not
so much the way it's used in HyperCard.

Thanks in advance. You should probably mail to me rather than post. I'll 
post a summary (provided local news software is working that week...)

   Radford Neal
   The University of Calgry