US 11,900,588 B2
Image based learning correction for mitigating thermal ghosting in a digital printer
Joseph C. Sheflin, Macedon, NY (US); Jack T. Lestrange, Macedon, NY (US); and Palghat S. Ramesh, Pittsford, NY (US)
Assigned to Xerox Corporation, Norwalk, CT (US)
Filed by Xerox Corporation, Norwalk, CT (US)
Filed on Jun. 2, 2021, as Appl. No. 17/336,729.
Prior Publication US 2022/0392039 A1, Dec. 8, 2022
Int. Cl. G06T 7/00 (2017.01); G03F 7/00 (2006.01); G01J 5/00 (2022.01)
CPC G06T 7/001 (2013.01) [G01J 5/00 (2013.01); G03F 7/7085 (2013.01); G03F 7/70516 (2013.01); G01J 2005/0077 (2013.01); G06T 2207/20081 (2013.01); G06T 2207/20084 (2013.01); G06T 2207/30144 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for mitigating thermal ghosting on a printed image with an ink-based image forming device having a rotatable imaging member with a reimageable surface in an environment having an ambient temperature, the method comprising:
a) after an imaging of a prior image on the reimageable surface, measuring temperatures of the reimageable surface with a temperature sensor adjacent the reimageable surface, the temperatures being affected by stress induced by the imaging;
b) aligning information of a current image with a temperature map of the reimageable surface where the current image will be rendered, the information including a pixel-wise gray level of the current image, the temperature map associated with the measured temperatures by the temperature sensor;
c) determining a corrected current image including a gray level modification of the current image based on the pixel-wise gray level of the current image and the temperature map to decrease marking material density at reimageable surface discrete coordinates that are warmer than a reference temperature and prevent ghosting of the prior image on a printing of the current image; and
d) rendering the corrected current image on the reimageable surface for a printing by the ink-based image forming device, the printing of the rendered corrected current image appearing not as the corrected current image, but as the current image.