| 摘要 |
PROBLEM TO BE SOLVED: To provide an image processing unit, an image processing method, a print controller, and a recording medium that can quickly convert image data into print data expressed in the presence/absence of dot formation without deteriorating the image quality. SOLUTION: An intermediate buffer stores temporarilly a gradation error caused in a pixel to be discriminated according to presence/absence of dot formation. After determining a prescribed number of pixels, a spread error that is spread to surrounding pixels not discriminated is calculated from a gradation error stored in the intermediate buffer and spread to an error buffer. Thus, in comparison with the case that the error is spread to the error buffer every time a gradation error takes place, the gradation errors can quickly be spread by the share of spreading the gradation errors by a prescribed number of pixels. A processing mathematically similar to the mean error minimizing method can be realized by utilizing the method above. |
