question about the given matlab code.

[micklexqg]

Hi, i find the corresponding matlab code in https://ivrlwww.epfl.ch/supplementary_material/RK_CVPR09/SourceCode/Saliency_CVPR2009.m,

but i wonder is there any difference?
in matlab code, the average object is the GaussianSmoothed image.
however, in the C++ code, the averaged is the original lab image.
Is the C++ code right in terms of the paper?
i test the both way and find no difference of salience results.
why is it so?