Patent ID: 6081608
Filing Date: 2000-06-27
Classification: B41F,G06K,G06T

Abstract:
A printing quality examining method in which image data of printing paper successively taken in by a camera of a detection unit are compared with a previously taken-in reference data to detect a printing defect so that a decision as to whether printing quality is good or bad is made, comprising averaging the image data of the printing paper successively taken in by the camera of the detection unit in time to calculate an estimated data and comparing the estimated data with the previously taken-in reference data so that when the estimated data is normal, pixels are determined to be normal and when the estimated data is unusual, the image data from the detection unit is compared with the reference data at next step so that when the image data from the detection is normal, the pixels are determined to be normal and when the image data is unusual, the pixels are determined to be defective and the paper is discharged.