Files compression
we can divide compression into two main types :
Lossy and lossless
1-lossy :
- Uses in images only .
- Eliminate “unnecessary” bits of information, tailoring the file so that it is smaller.
- This type of compression is used a lot for reducing the file size of bitmap pictures .
2-lossless
- Uses for all types of files .
- lists that information once and then refers back to it whenever it appears in the original program.
- Most of this comperssion programes using Lempel and Ziv ( LZ ) algorithm .
- Pick out the repeated bytes and put them into the numbered index. Then, we simply write the number instead of writing out the whole file’s information .
Tags: alzip, compartion, compression, image, INDEXED, LZ, rar, size, winzip, zip
