The concept of bidimensional signal detachable degree is explained and analyzed.Based on the Bidimensional Empirical Mode Decomposition(BEMD)theory and the bidimensional signal analytic phase theory

this paper brought out add and product detachable degree calculation formulas for bidimensional empirical mode signal.To verify these two formulas'actual effects

we performed experiments with complete add detachable signal and complete product detachable signal.The application of bidimensional empirical mode detachable degree shows that it can identify the BEMD algorithm's quality and has capability to determine the objective BEMD stopping criterion.It also provides an effective basis for the choice of preprocessing methods when extracting single orientation features.