The direct selection,linear,and third order reflectance abridgement methods are discussed and tested. It is found that the third order method is the best when abridging reflectance from 5 nm to 10 nm,20 nm or 30 nm intervals,while the direct selection method is the best when abridging reflectance from 10 nm to 20 nm or 30 nm. In addition,it's found that abridgment methods are comparative to Vector Subspace Method when the spectral image compression application is considered. The tested and compared results show that the methods can be used in practice when the reflectance abridgement or spectral image compression is required.