Method for assessing synchronized print defects
AssigneeXerox Corporation
InventorWencheng Wu
Life of this patent
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Abstract
As set forth herein, a computer implemented method is used to detect synchronized defects in documents. Profiles of single separation test targets are characterized for one or more toner colors. A spatially varying toner reproduction curve (TRC) is constructed for each profile on terms of an area coverage in versus area coverage out. A profile is extrapolated for each color of interest and a CMYK profile is applied to obtain a correlating L*a*b* profile for each color of interest.
Claims20
A computer implemented method to detect synchronized defects in documents, comprising:
- characterizing profiles of single separation test targets for one or more toner colors;
- constructing a spatially varying toner reproduction curve (TRC) for each profile on terms of an area coverage in versus area coverage out;
- extrapolating a profile for each color of interest;
- and
- applying a CMYK profile to obtain a corresponding L*a*b* profile for each color of interest.
A computer implemented method to evaluate synchronized defects comprising:
- printing streak targets for each toner color utilized by a print engine for area coverage;
- measuring the streak targets to obtain their streak profiles;
- constructing spatially varying TRCs in terms of AC in versus AC out;
- extrapolating the streak profiles for each color of interest;
- and
- assessing the quality of streaks for colors of interest by applying an IQ assessment engine.
A computer implemented method to assess quality of synchronized print defects comprising:
- characterizing spatial information of the defects in detail via single separation test targets;
- extrapolating spatial profiles for each color of interest;
- and
- assessing quality of defects across a full printer gamut using color information of a nominal printer model based at least in part upon the spatial profile extrapolation.
Dependencies are inferred from the claim text.