A shape matching algorithm is studied in this paper. Binary rank order transform

a new mor-pholopcal transform

is introduced.Shape matching function is defined

and its properties are discussed. A set ofshape templates is constituted

and a new scheme of shape recognition is proposed

which is simple

high effi-cient

and easy to implement parallelly. Finally

the new algorithm is used for recognition of indicatory trafficsigns

the experimental results show its robustness and effectiveness .