There are many pixel-level fusion methods for remote sensing images,but the differences of those are ambiguous because of lacking a unique description,which makes it difficult to apply image fusion purposefully.

The generalized model characterizing most remotely sensed data pixel-level fusion techniques is very important for theory analysis and application.

From the D-S(Dempster-Shafer)evidential theory for image element level data fusion to the Analytic Hierar-chy Process general evaluation method for decision making level data fusion,it provides a new so-lution for multi-factor substat.