| 摘要 |
PROBLEM TO BE SOLVED: To prevent the number of gradations of image data to be printed out from being reduced even when the data is subjected to γ correction and enable the regeneration of stable gradational properties. SOLUTION: A CPU for an engine 54 creates an image (an image is created by cutting a specified gradation part regarding some of patterns for γ correction) in its rotating direction on a recording medium using the plural patterns for γcorrection consisting of highlighted dots whose gradations are beforehand gradually varied by the number of writing dots around the highlighted dots, as gradation patterns respectively. In addition, each of the densities of the image is detected using an photosensor and the γ correction data is created based on the detection results. After that, a γ correction part 52 interprets the environment of the highlighted dots of image data subjected to simulated gradation process from a printer controller 51, referring to the surrounding dots. Further, based on the interpretation results, the γ correction part 52 selects either of the sets of the γcorrection data, and outputs an appropriate write level signal by correcting the gradations of the highlighted dots of the image data using the selected set of the γ correction data. |
