how to understand the eigenvector of the foreground object should have a larger absolute value than the one of the background?

[Taoww21480]

Thank you very much for your contribution. I don't quite understand the paragraph in your paper. Could you please explain it? The original text is as follows:
Intuitively, di < dj if vi belongs to the foreground while vj is the background token. Therefore, the eigenvector of the foreground object should have a larger absolute value than the one of the background. We use the maximum absolute value vmax to select the foreground partition and the most salient object.