ButteraugliDiffmap 1670 butteraugli.cc     ButteraugliDiffmap(scaled0, scaled1, diffmap_scaled);
ButteraugliDiffmap 1698 butteraugli.cc   ButteraugliDiffmap(rgb0, rgb1, diffmap);
ButteraugliDiffmap  460 butteraugli.h  void ButteraugliDiffmap(const std::vector<ImageF> &rgb0,