IMAGE PROCESSOR AND ITS CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To add an optimum random number in a pseudo halftone process. SOLUTION: The set value (range,αandβ) are selected from a random number setting table 406 in response to the signals 'bit' and 'sel'. Based on these selected set value, a random number addition processing part 402 adds the random number value to the input image data which are given from a variable processing part 401. An ED processing part 403 or a screen processing part 404 applies a pseudo halftone process to the image data. Then a selector 405 selects and outputs the image data.