All posts tagged ‘wiki’

File Under: Glossary

Interlaced

If a computer-displayed image is interlaced, then it is rendered in alternating horizontal lines.

For example, browsers display interlaced GIFs in alternating passes, skipping every other line and rendering a kind of blurry image first and then sharpening it on subsequent passes. This is useful if you’d like your viewers to get a general idea of the image while they are downloading it. Interlacing for GIFs was designed to make bigger images quicker to download, but the problem is that an interlaced GIF actually has a larger file size than a non-interlaced GIF, so use this method cautiously.

File Under: Glossary

Mozilla

The Mozilla corporation is an open source group responsible for the Firefox browser and several other free and open source programs.

See [1] for more information.

File Under: Glossary

DNS

The domain name system (DNS) is an internet service that translates domain names (like wired.com) into IP addresses (like 208.77.188.166).

We use domain names because people can remember words better than numbers, but web servers still need the IP numbers to access the page. Every time you use a domain name, a DNS server must translate the name into the corresponding IP address.

File Under: Glossary

PGP


Pretty Good Privacy is a flavor of algorithmic encryption that uses two cipher keys, one public and one private. Anyone can use a public key to send a scrambled message to the receiving party. The private key is then used only by the receiving party to unscramble incoming messages. The two-key system was developed by RSA Data Security, Inc. and PGP is the most popular type of two-key encryption available for public, non-commercial use.

File Under: Glossary

Render


To render a graphic means to draw a real-world object as it actually appears. There are two widely used rendering processes:ray tracing and scanline rendering. Scanline rendering creates images one vertical line at a time, while ray tracing renders object-by-object. In general, ray tracing produces better results, but scanline rendering is useful in animation, where the image quality of each individual frame isn’t as important as the finished product.