| 摘要 |
PROBLEM TO BE SOLVED: To provide an image filter arithmetic device in which calculation costs are smaller than conventional, and with which it is possible to control a calculation error as desired.SOLUTION: Provided is an image filter arithmetic device for performing image smoothing on an input image {x(p)} by the convolution arithmetic of a space kernel gand a range kernel g, the image filter arithmetic device comprising: approximation parameter optimization means for determining the set (T, K) of a truncation number K and a significant cycle T in an approximate range kernel g^in which the range kernel gis Fourier-series approximated for a scale parameter σ, a permissible error τ, and a dynamic range R, so that an approximation error becomes τ or less; expansion coefficient arithmetic means for calculating the expansion coefficient {a, and so on, a} of the approximate range kernel g^; and filter arithmetic means for executing the convolution arithmetic using the expansion coefficient {a, and so on, a}.SELECTED DRAWING: Figure 12 |
