FUZZY DETECTION OF EDGE-DIRECTION FOR VIDEO LINE DOUBLING

Video line doubling can be realized using time-space interpolation fil ters. To improve their performances for moving diagonal lines, we have developed a fuzzy edge-direction detector. This fuzzy detector works by identifying small pixel variations in five orientations (0 degrees +/- 45 degrees, and +/- 60 degrees) and by using rules to infer the pr evailing direction, This direction is then used to spatially rotate th e interpolation filter. For the fuzzy detector, three fuzzy sets are u sed to characterize the inputs, and two rule bases have been validated . This article presents the characteristics of the fuzzy edge-directio n detector along with the methodology used for fuzzy sets positioning, Detection and Interpolation results are also presented.