A lossy image compression algorithm that utilizes bit packing.
- Unfortunately, it is not possible to run the project on your machine, since the required libraries are hosted in Tufts servers.
-
40image.c is the main() in which the program is ran.
-
compress40 has the functions for compressing and decompressing, which are called by 40image
-
convert has functions to convert from rgb space to video space and vice versa.
-
dct has functions that transfrom y, pb, pr to dct float values and vice versa.
-
quant has functions that quantize dct float values into indices and vice versa.
-
wordpack has functions that pack quantized dct values into 32-bit codewords and vice versa.
-
bitpack has functions that are used by wordpack in order to directly manipulate the bits in a word.
-
ppmdiff is used for checking the percent difference between the original image and an image that went through compression & decompression.
It is a very lengthy algorithm, we recommend to check the project spec.
Our implementation is able to preserve the image 94%.
Before and after compression & decompression.