| 摘要 |
Apparatus for interpolating data obtained along radial scan lines so that it can be displayed at display points (DP) arranged in orthogonal rows and columns by recursively adding stored values to derive signals (RERR', theta ERR') indicative of the radial position of each display point along the radial data lines and its angular position between the radial data lines. Using these signals, interpolation is done along each radial line to derive first and second intermediate interpolated values, and these values are interpolated so as to derive the final data value for the display point at its angular position. Alternatively, the intermediate interpolated values can be attained by angular interpolation and the final data value by radial interpolation. The invention is particularly concerned with the recursive derivation of the radial positions of display points. <IMAGE>
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