CS4481

Course work for image compression, written in C.

Assignment 1

Generates images as described in the instructions. Allows the user to create a predetermined PBM, PGM, or PPM image and specify the image's width, height, and name.

Assignment 2

Huffman encoder and decoder for PGM images (unfinished).

Assignment 3

LZ77 encoder and decoder for PGM images.

Assignment 4

DPCM encoder and decoder for PGM images. Allows users to choose from the following prediction rules:

• 1: Use W to predict encoded pixels
• 2: Use N to predict encoded pixels
• 3: Use W/2 + N/2 to predict encoded pixels
• 4: Use CALIC initial prediction using binary mode and continuous-tone mode