Patent ID: 6693724
Filing Date: 2004-02-17
Classification: G06K

Abstract:
An image data processing apparatus, comprising:an input element determination unit for determining whether an input element provided by a computer is one of a command for processing continuous tone data and continuous tone data; a parameter input unit connected to an output of the input element determination unit for receiving a parameter from the input element determination unit for processing the continuous tone data when the input element provided by the computer is the command for processing continuous tone data; a parameter replacement unit connected to an output of the parameter input unit for replacing the parameter received by the parameter input unit with an approximate value realized by a multiple-valued recorder; a threshold-valued matrix selection unit for selecting a continuous tone screen threshold-valued matrix on the basis of the parameter replaced by the parameter replacement unit; a continuous tone data input unit connected to an output of the input element determination unit for receiving the continuous tone data from the input element determination unit, and for transmitting the received continuous tone data, when the input element provided by the computer is the continuous tone data; a continuous tone processing unit connected to an output of the threshold-valued matrix selection unit and to an output of the continuous tone data input unit for converting the continuous tone data transmitted by the continuous tone data input unit to multiple-valued data in accordance with the threshold-valued matrix selected by the threshold-valued matrix selection unit; and an output unit for outputting to the multiple-valued recorder the multiple-valued data converted by the continuous tone processing unit.