| 摘要 |
PROBLEM TO BE SOLVED: To prevent an erroneous detection due to a reading error of a sensor. SOLUTION: A method for detecting a discharge failure includes: reading with a sensor an image which has been formed on a medium by a nozzle discharging a fluid onto the medium while relatively moving to the medium in a relative movement direction, based on image data; finding a difference between pixel values of read data pixels continuously arranged in a row in a direction intersecting with the relative movement direction in data read by the sensor, and pixel values of image data pixels corresponding to the read data pixels in the image data, respectively; and detecting a discharge failure of the nozzle by comparing the maximum difference value when the difference shows the maximum value with a non-maximum difference value when the difference does not show the maximum value. COPYRIGHT: (C)2011,JPO&INPIT
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