| 摘要 |
PURPOSE:To contrive the high speed of an interpolation processing by selecting the addresses of three points by means of a decimal part address value, preparing a coefficient for the selected three points, reading the data of the three points, and obtaining the inner product of the three point data and coefficient. CONSTITUTION:Two-dimensional real number coordinates (X, Y) are separated into integer part addresses (x, y) and decimal part addresses (Kx, Ky), and based on the value of the decimal part addresses (Kx, Ky), the three point addresses to be used for interpolation are selected out of (x, y), (x+1, y), (x, y+1) and (x+1, y+1). Next, the coefficient for the selected three points is prepared, and the inner product of the three point data and the three point coefficient is obtained. That is, the two-dimensional real number coordinates are separated to the integer part addresses and the decimal part addresses, the three point addresses are selected based on the value of the decimal part addresses, the coefficient for the selected three points is prepared, the three point data are read, and the inner product of the three point data and coefficient is obtained. Thus the two-dimensional data of the real number coordinates can be interpolation-processed at high accuracy and at high speed. |
