xBlog: The visual thinking weblog
27th January 2006

Scanned Images, Engravings and Pictures From Old Books

“Over 880 images scanned from old books, most with multiple high-resolution versions! They are all public domain (copyright-free, out of copyright) unless otherwise noted, and can be used as historical reference in teaching, royalty-free stock images, scrapbook clip art, or even on your own Web site…”

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27th January 2006

Endless compression

“What is almost endless lossless data compression? Implode (coding) a long code (input data) in a short key code (output data). Explode (decoding) the short key code back in the original long code. It’s not allowed that two different long codes generate the same short key code.”

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