VALUE img_gradcor(VALUE obj, VALUE obj2) { RUBY_VIPS_BINARY(im_gradcor); }
VALUE img_spcor(VALUE obj, VALUE obj2) { RUBY_VIPS_BINARY(im_spcor); }
VALUE img_fastcor(VALUE obj, VALUE obj2) { RUBY_VIPS_BINARY(im_fastcor); }
VALUE img_hist_indexed(VALUE obj, VALUE obj2) { RUBY_VIPS_BINARY(im_hist_indexed); }
VALUE img_de_from_lab(VALUE obj, VALUE obj2) { RUBY_VIPS_BINARY(im_dE_fromLab); }
VALUE img_de_from_xyz(VALUE obj, VALUE obj2) { RUBY_VIPS_BINARY(im_dE_fromXYZ); }