TWO-DIMENSIONAL DATA INTERPOLATING SYSTEM

摘要

A two-dimensional data interpolating system in which the amount of calculation is small and few errors are produced. A data processor includes a discrete value extracting unit (10), an X-direction sampling function calculating unit (20), an X-direction convolution unit (30), Y-direction sampling function calculating unit (40), and an X-direction convoluting unit (50). The discrete value extracting unit (10) extracts data on pixels contained in a predetermined area around a point concerned to be subjected to interpolation. The X-direction sampling function calculating unit (20) and X-direction convoluting unit (30) calculate interpolation values (X-direction interpolation values) by using a sampling function differentiatable only once over the whole region and having finite values based on the data on pixels whose Y coordinates are the same. The Y-direction sampling function calculating unit (40) and Y-direction convolution calculating unit (50) calculate the interpolation values corresponding to the point concerned by using the sampling function based on the X-direction interpolation values.