Lempel-Ziv-Welch (LZW) is a universal lossless data compression algorithm created by Abraham Lempel, Jacob Ziv, and Terry Welch. It was published by Welch in 1984 as an improved implementation of the LZ78 algorithm published by Lempel and Ziv in 1978. The algorithm is designed to be fast to implement but is not usually optimal because it performs only limited analysis of the data.

GIF is a lossless compression introduced by CompuServe in 1987 using Lempel-Ziv-Welch (LZW) lossless data compression.

how to use lempel_ziv encoding ?

Lempel-Ziv-Welch (LZW) encoding is patented, thus we cannot show you a working example. However, the basic algorithm is well-documented on various websites including Wikipedia. If you can follow the algorithm, you can write the code. But you cannot distribute the code without the requisite licence.

lossless