The basis functions of traditional Krawtchouk moments are constructed by the product of two Krawtchouk polynomials of one variable. However

the relation between two directions of the plane is isolated. Hence

new image moments whose basis functions are Krawtchouk polynomials of two variables are proposed in this paper

while a simple method is deduced to compute normalized polynomials. Reconstruction experiments show that

compared with discrete orthogonal moments of one variable

moments of two variables have less reconstruction error.