System and method for reducing non-linearity errors between two imaging stations
AssigneeXerox Corporation
InventorsThomas M. Baretsky, Rosario A. Bracco
Life of this patent
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Abstract
A system and method for spatially matching the output of two imaging stations in an electro-photographic device by using a second order polynomial curve and a third order polynomial curve to approximate the non-linearity errors between the two imaging stations and using the second order polynomial curve and the third order polynomial curve to modify the frequency of a pixel clock.
Claims12
A method of reducing scan line non-linearity errors in a device comprising:
- reading a first plurality of switches on a dual in-line package (DIP) to identify one second order polynomial curve profile in a plurality of stored second order polynomial curve profiles;
- reading a second plurality of switches on the DIP to identify one third order polynomial curve profile in a plurality of stored third order polynomial curve profiles;
- generating a scan line non-linearity correction profile with the identified second order polynomial curve profile and the identified third order polynomial curve profile;
- and
- modifying the frequency of a pixel clock in accordance with the generated non-linearity correction profile to reduce scan line non-linearity errors.
A method of reducing scan line non-linearity errors in a device comprising:
- generating a first visible non-linearity identifier;
- generating a second visible non-linearity identifier;
- generating a third visible non-linearity identifier;
- identifying one second order polynomial curve profile in a stored plurality of second order polynomial curve profiles based upon the first visible non-linearity identifier;
- identifying one third order polynomial curve profile in a plurality of third order polynomial curve profiles based upon the second visible non-linearity identifier and the third visible non-linearity identifier;
- and
- modifying the frequency of a pixel clock based upon the identified second order polynomial curve profile and the identified third order polynomial curve profile.
A method of reducing scan line non-linearity errors in a device comprising:
- generating a first visible non-linearity identifier with a first plurality of pixels on a photo sensitive medium generated with a first imaging station to form a reference line, and a second plurality of pixels on the photosensitive medium generated with a second imaging station to form an indicator line;
- generating a second visible non-linearity identifier;
- generating a third visible non-linearity identifier;
- identifying one second order polynomial curve profile in a stored plurality of second order polynomial curve profiles based upon the first visible non-linearity identifier;
- identifying one third order polynomial curve profile in a plurality of third order polynomial curve profiles based upon the second visible non-linearity identifier and the third visible non-linearity identifier;
- and
- modifying the frequency of a pixel clock based upon the identified second order polynomial curve profile and the identified third order polynomial curve profile.
A method of reducing scan line non-linearity errors in a multistage imaging device comprising:
- generating a first visible scan line non-linearity identifier with the device;
- generating a second visible scan line non-linearity identifier with the device;
- generating a third visible scan line non-linearity identifier with the device;
- identifying a second order polynomial curve profile based upon the first visible scan line non-linearity identifier;
- identifying a third order polynomial curve profile based upon the second visible scan line non-linearity identifier and the third visible scan line non-linearity identifier;
- and
- modifying the frequency of a pixel clock in the device using the second order polynomial curve profile and the third order polynomial curve profile.
Dependencies are inferred from the claim text.