# MakeFullDiff

std.MakeFullDiff(vnode clipa, vnode clipb)

  Calculates the difference between clipa and clipb and outputs a clip with a one higher bitdepth to avoid the clamping or wraparound issues that would otherwise happen with filters like MakeDiff when forming a difference. This function is usually used together with MergeFullDiff, which can be used to add back the difference.

  Unsharp mask:

      blur_clip = core.std.Convolution(clip, matrix=[1, 2, 1, 2, 4, 2, 1, 2, 1])
      diff_clip = core.std.MakeFullDiff(clip, blur_clip)
      sharpened_clip = core.std.MergeFullDiff(clip, diff_clip)