An apparatus for obtaining color values at arbitrary locations on the face of an electronic display (36) having a memory means (14) for providing color values at predetermined locations. A neighborhood of data points surrounding the arbitrary location is processed by a bilinear interpolator (18, 22, 26) operating on the scalar differences of the predetermined data points and the arbitrary location of the desired data point. This system provides for continuous processing without interruption of the data flow while the interpolation process proceeds.

Color processor for digital map display system.

Algorithm for interpolating two-dimensional image data to change picture-element spacing implemented in dedicated digital hardware for high-speed execution. System interpolates 100 times as fast as generalpurpose computer. Image resampling occurs first along one image axis and then along other, using two interpolation devices implemented in series.

R. Hartenstein

Papers

Image Interpolation With Dedicated Digital Hardware