An exact method for computing the area moments of wavelet and spline curves

M. Jacob, T. Blu, M. Unser
2001 IEEE Transactions on Pattern Analysis and Machine Intelligence  
AbstractÐWe present a method for the exact computation of the moments of a region bounded by a curve represented by a scaling function or wavelet basis. Using Green's Theorem, we show that the computation of the area moments is equivalent to applying a suitable multidimensional filter on the coefficients of the curve and thereafter computing a scalar product. The multidimensional filter coefficients are precomputed exactly as the solution of a two-scale relation. To demonstrate the performance
more » ... te the performance improvement of the new method, we compare it with existing methods such as pixel-based approaches and approximation of the region by a polygon. We also propose an alternate scheme when the scaling function is sinx.
doi:10.1109/34.927463 fatcat:x6xniljdvvfd3pshazvw3trz5u