Title :
DC coefficient restoration by cosine and sine transforms
Author_Institution :
Chinese University of Hong Kong, Department of Electronics, Shatin, Hong Kong
Abstract :
DC coefficients in a transform coded picture can be restored by minimisation of edges between blocks. The letter shows that the minimisation algorithm can be achieved using the well known cosine transform or sine transform.
Keywords :
encoding; minimisation; picture processing; transforms; DC coefficient restoration; cosine transform; edges minimisation; encoding; image processing; minimisation algorithm; sine transform; transform coded picture;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19870257
