Process controls methods and apparatuses for improved image consistency
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United States of America Patent
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Jun 3, 2008
Grant Date -
Nov 15, 2007
app pub date -
May 12, 2006
filing date -
May 12, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Density or reflectance targets for respective first and second marking engines of a document processing system are determined. A series of control patches is printed with the respective first and second marking engines. Relative reflectance values of each control patch printed with the first and second engines are determined. First marking engine relative reflectance error values of each control patch and second marking engine relative reflectance error values of each control patch are determined correspondingly based at least on (a) corresponding first engine relative reflectance value and target relative reflectance value and (b) corresponding second engine relative reflectance value and target relative reflectance value. Based at least on one of the first and second marking engine relative reflectance error values, at least one of the first and second engine relative reflectance targets is adjusted. Based at least on the adjusted target, an image quality control of the document processing system is improved.
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