POSITION DEVIATION ORDER DETECTION METHOD, IMAGE POSITION DEVIATION CORRECTION METHOD, STREAK UNEVENNESS CORRECTION TABLE CREATION METHOD, AND STREAK UNEVENNESS CORRECTION METHOD

摘要

A position deviation order detection method according to the invention calculates a difference between input image data of an original image used for printing an image using an inkjet printer and output image data acquired by reading the image using a scanner for each pixel, and compares the calculated difference with a first threshold value to extract pixels for which the difference is equal to or larger than the first threshold value, and detects the size of a position deviation of the image by the number of pixels of a closed pixel group among the extracted pixels.

主权项

1. A position deviation order detection method for detecting, in order to determine a streak unevenness correction chart that has a size corresponding to the size of a position deviation of an image generated when the image printed by an inkjet printer is read using a scanner and includes a density image pattern formed by a plurality of units for correcting the position deviation of the image, the size of the position deviation of the image, the method comprising:
calculating a difference between input image data of an original image used for printing the image by the inkjet printer and output image data obtained by reading the image using the scanner for each pixel; comparing the calculated difference with a first threshold value and extracting pixels for which the difference is equal to or larger than the first threshold value; and detecting the size of the position deviation of the image according to the number of pixels of a pixel group that forms a closed figure among the extracted pixels.