A method for a motion detection in an interlaced field sequence includes selecting two initial fields from the interlaced field sequence. Each of the two initial fields have different scan lines. The method also includes interpolating each of the two initial fields to generate two respective new fields. The new fields have raster lines that are congruent. The method further includes generating a value of a pixel of each new field using pixel values of at least two scan lines of a corresponding initial field surrounding the pixel. Further, the method includes performing a motion detection based on the new fields.