| 摘要 |
PURPOSE:To easily obtain a desirable color compensating output, by converting a non-linear characteristic to a polynominal expression for making a color separation input signal a variable, and providing a means for giving a compensating coefficient value of each term as a parameter, in addition to a function value of its each term. CONSTITUTION:(c), (m) and (y) inputs 201 which have been A/D-converted are provided to an address input line of function term generators 202, and function values of secondary non-linear terms such as (c), (m), etc. which have been separated and stored in advance are read out. A multiplexer 203 leads selectively in order inputs of 10 terms such as a primary term, a secondary term, etc. to an output line 210 in accordance with a timing control signal 207, against one group of inputs. On the other hand, compensating coefficients are set in advance to an RAM 204 through a data line 208, and a function value and a compensating coefficient of each term are fetched in order by time series from each multiplexer 203 and the RAM 204 in accordance with a control signal 207. Subsequently, the matrix operation is executed by time series by use of a cumulative multiplier 205, and compensated outputs 209 of c0, m0 and y0 are obtained. In this way, a desirable color compensating output is obtained easily at a high speed. |
