I should have used the term 'YUV chroma smearing' ...it's been a while. Here are two link where Lpowell explains about it. http://www.dvxuser.com/V6/showthread.php?340370-Exposing-V-LOG-L&p=1986578386&viewfull=1#post1986578386 http://www.dvxuser.com/V6/showthread.php?340370-Exposing-V-LOG-L&p=1986578534&viewfull=1#post1986578534