| 摘要 |
An image data processing apparatus determines whether an input element provided by a computer is either a command for processing continuous tone data or continuous tone data. When the input element provided by the computer is a continuous tone data processing command, a parameter (period, angle, form of a macroscopic dot) received by a parameter input unit is replaced by an approximate value realized by a multiple-valued recorder, a continuous tone screen threshold-valued matrix is selected on the basis of the parameter replaced by the parameter replacement unit, and continuous tone data is converted to multiple-valued data in accordance with the selected threshold-valued matrix for outputting halftone data to the multiple-valued recorder.
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