Scan conversion apparatus and method.

摘要

Scan conversion apparatus that utilises a look-up table (29) for each polar coordinate point to be converted, storing a fill count and a peak detect signal for the point. The fill count signal represents the number of unaddressable pixels to be filled associated with the point. The unaddressable pixels are filled with target data corresponding to the range thereof. Multiaddressable pixels and the unaddressable pixels associated therewith are filled with peak data derived from the maximum of the current target data at the coordinate or the data store in the refresh memory (39) for the coordinate.