A method for comparing pixels may comprise determining at least one polarity difference for at least one pair of neighboring pixels selected from a plurality of adjacent pixels, which are from different fields. A number of subsequent polarity changes may be calculated for the pair of neighboring pixels based on the determined polarity of difference. The adjacent pixels may be selected from a plurality of woven fields. A portion of the selected adjacent pixels may include pixels in neighboring fields. A portion of the selected adjacent pixels may include vertically adjacent pixels, horizontally adjacent pixels, and/or diagonally adjacent pixels. At least one pixel in the plurality of adjacent pixels includes a corresponding horizontally, vertically or diagonally located adjacent pixel in a different field.