A method and system for compensating for an image quality defect in an image printing system comprising at least one marking station, the at least one marking station comprising a charging device for charging the image bearing surface, an exposing device for irradiating and discharging the image bearing surface to form a latent image, a developer unit for developing toner to the image bearing surface, and a transfer unit for transferring toner from the image bearing surface to an image accumulation surface is provided. The method includes sensing the image quality defect on an image bearing surface by an electrostatic voltmeter (ESV) in the image printing system and determining the frequency, amplitude, and/or phase of the image quality defect by a processor. In one embodiment, the method includes compensating for the image quality defect by modulating the power of an exposing device during an expose process. In another embodiment, the method includes compensating for the image quality defect by modifying image content.
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