Besides special visual requirements,designing the basic shape of furniture and having their dimensions and sense of spatial scale are counting on the dimensions and standards of the architecture space and users,which also reflect the combination of objectivity and subjectivity.

In this paper, the concept of the choice of scale in remote sensing is given firstly.

Firstly,UDWT is used to divide the raw wave into different channels in frequency field to extract the deep information including fault;secondly, based on fractal analysis, the correlation dimension criterion is set up in the sensitive scales interval to realize parameterized detection of weak fault.