US 11,922,241 B1
Printer calibration mechanism
Mikel Stanich, Boulder, CO (US); Walter F. Kailey, Boulder, CO (US); Scott R. Johnson, Boulder, CO (US); Pallavi Premkumar, Boulder, CO (US); and William Manchester, Boulder, CO (US)
Assigned to Ricoh Company, Ltd., Tokyo (JP)
Filed by Mikel Stanich, Boulder, CO (US); Walter F. Kailey, Boulder, CO (US); Scott R. Johnson, Boulder, CO (US); Pallavi Premkumar, Boulder, CO (US); and William Manchester, Boulder, CO (US)
Filed on Mar. 13, 2023, as Appl. No. 18/182,932.
Int. Cl. G06K 15/02 (2006.01); B41J 2/045 (2006.01)
CPC G06K 15/027 (2013.01) [B41J 2/04508 (2013.01); B41J 2/0456 (2013.01); B41J 2/04586 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
at least one physical memory device to store calibration logic; and
one or more processors coupled with the at least one physical memory device to execute the calibration logic to:
receive a reference halftone design;
receive reference ink drop size data;
receive a reference printer transfer function corresponding to the reference halftone design, a reference printer response target and a reference print substrate;
receive first print measurement data corresponding to the reference halftone design, the reference printer transfer function and a first print substrate;
receive first printer response target;
generate a first intermediate print substrate transfer function based on the first print measurement data and the first printer response target;
generate a first printer transfer function based on the first intermediate print substrate transfer function, the reference halftone design, the reference ink drop size data and the reference printer transfer function; and
generate a first print substrate transfer function as an approximation of a function with input values determined as the first printer transfer function evaluated at digital count values and output values determined as a composition of the first intermediate print substrate transfer function and the reference printer transfer function evaluated at the digital count values;
wherein a transfer function comprises a mapping of an input digital count to an output digital count.