灰度图像仿射矩不变量算法的改进

On the computational aspects of first rotation moment invariants, primary method of computation has inaccurate values. In this work, we get exact express of first rotate angle, which is based on moment tensors. The proposed rotate angle replaces the former one for gray level images. Numerical experiments are performed to test the invariance of number images as well as character images. According to the comparison, the obtained results clearly explained the efficiency of the proposed method.