Morphological video coder with conditional smoothing
PJ Czerepinski, David Bull · Electronics Letters · 1996
In the context of coding the displaced frame difference signal in an image sequence. morphological segmentation is an alternative to linear methods such as the DCT. Although these non-linear approaches offer attractive features such as edge preservation and a lack of ringing, they can introduce artefacts such as spurious edges in the reconstructed video sequence. In this letter, a smoothing algorithm is described that reduces this problem and yields significant subjective quality improvements.