초록 ▼

An electrographic system and method having a control which carries out correction for graphic surface non-linearities. The control employs a procedure wherein a correction look-up table is developed as part of the manufacture of the device wherein output readings are taken along a physical domain re

An electrographic system and method having a control which carries out correction for graphic surface non-linearities. The control employs a procedure wherein a correction look-up table is developed as part of the manufacture of the device wherein output readings are taken along a physical domain rectangular grid array of predetermined dimension and these output readings are adjusted in their signal domain to establish a regularly incremented sequence of address values within that signal domain. Physical domain coordinate values then are derived and placed in the table for each address value. The control then accesses this memory for each of a given locator or tracer position on the graphic surface and carries out an interpolative weighting to derive acceptably accurate coordinate pair signals which are outputted to a host computer or the like.

대표청구항 ▼

An electrographic system comprising: means defining a graphics surface; locator means movable in adjacency about said surface for select interaction therewith to effect the derivation of position signals; circuit means responsive to said position signals for deriving digital position signals; memory

An electrographic system comprising: means defining a graphics surface; locator means movable in adjacency about said surface for select interaction therewith to effect the derivation of position signals; circuit means responsive to said position signals for deriving digital position signals; memory means for retaining computed physical domain coordinate values derived as values corresponding with select said digital position signals of a signal domain and established for each position within a predetermined grid array of pre-established positions of said physical domain, adjusted to establish a regularly incremented sequence of address values within said signal domain; and control means responsive to each given said digital position signal received thereby for deriving a said address value corresponding therewith, for accessing said memory means at said address value to retrieve computed physical domain coordinate values corresponding therewith and for adjusting the values of said computed physical domain coordinate value by select-dimensional interpolative weighting thereof in correspondence with said received digital position signal to derive corrected coordinate pair output signals.