About imwrite and image compression

Hi, I have been trying to work on image compression and I found that matlab does it through functions like imwrite. But in order to do it matlab has to have the encoding and decoding algorithms for each format ie. for the jpeg, matlab has to have stored the huffman encoding tables. So far all that I know is that imwrite works evaluating a function through feval. Actually, one of the input parameters is fmt.write (format write), which is a function handler. So I wanted to know if there is a way to get to those encoding and decoding archives or if you have an implementation of the EBCOT algorithm. Thank you.

Answer 1

[Titus Edelhofer]

Hi Ana,

if you take a look at matlabroot\toolbox\matlab\imagesci\private you will see the mex files (e.g. wgifc.mexw32). They do the actual writing of the files. So the answer is unfortunately no, there is no way to look at the encoding/decoding algorithms used...

Titus