Method and apparatus for direction related interpolation

Details Method and apparatus for direction related interpolation Method and apparatus for direction related interpolation

H - Electricity

04

N

H04N 7/12 (2006.01) H04N 5/44 (2006.01)

Patent

CA 2090696

For Proscan conversion adjacent fields cannot be used to inter- polate moving objects because motion blur will be introduced then. The most simple solution is to insert the average of the two adjacent lines for each missing line. A technique superior to vertical averaging represents the DIAG3 algorithm, where ac- cording to the found minimum gradient the orientation of the in- terpolation filter is chosen. But in case of high diagonal frequencies interpolation errors will occur. Therefore it is tested if the reconstructed pixel value exceeds or falls below the pixel values in the two adjacent lines of the input signal. If this happens, instead of one of the detected diagonal directions the vertical direction is taken, i.e. a ver- tical averaging is carried out.

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