Patent ID: 8548204
Filing Date: 2013-10-01
Classification: G06K

Abstract:
1. An image processing device comprising: an input unit which inputs image data of a chart for inspection; and a streak detection processing unit which specifies an inspection region in the image data inputted by the input unit, calculates a line average value which is an average value of all pixels on a line, which corresponds to a main scanning pixel, for each line in a sub-scanning direction in the inspection region, calculates a width average value which is an average value of the line averages of the lines corresponding to a series of main scanning pixels, the number of which is a specified width and whose center is a target pixel, for each target pixel which is a main scanning pixel selected sequentially in a inspection direction from the first main scanning pixel to the last main scanning pixel, calculates a difference between the width average value, and the average value of the line average values of the target pixel and a predetermined number of main scanning pixels which are the nearest to the target pixel located at a backward side of the target pixel with respect to the inspection direction, and determines that the target pixel is included in a streak when the difference exceeds the threshold value set in advance.