Invention Grant
- Patent Title: Methods and systems for achieving print uniformity using reduced memory or computational requirements
- Patent Title (中): 使用减少记忆或计算要求实现打印均匀性的方法和系统
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Application No.: US12786694Application Date: 2010-05-25
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Publication No.: US08705120B2Publication Date: 2014-04-22
- Inventor: Yequing (Juliet) Zhang , Daniel E. Viassolo , Susan J. Zoltner , Howard A. Mizes , Robert P. Loce
- Applicant: Yequing (Juliet) Zhang , Daniel E. Viassolo , Susan J. Zoltner , Howard A. Mizes , Robert P. Loce
- Applicant Address: US CT Norwalk
- Assignee: Xerox Corporation
- Current Assignee: Xerox Corporation
- Current Assignee Address: US CT Norwalk
- Agency: Ortiz & Lopez, PLLC
- Agent Kermit D. Lopez; Luis M. Ortiz
- Main IPC: H04N1/46
- IPC: H04N1/46 ; H04N1/60

Abstract:
Engine response curves (RCs) can be used for streak compensation for printed documents. A feedback control paradigm can be included to effect RC compensation. Singular Value Decomposition (SVD) can be used to represent each RC in the collection of spatial RC data as a linear combination of basis vectors. RCs are approximated by selecting the first few basis vectors, the approximation aiding in noise rejection and reducing computation in the controller by reducing dimensionality of the RC data from gray levels to the number of SVD bases selected. An optimal subset of RCs is selectable from the set of approximated RCs by clustering the SVD weights, the clustered SVD weights producing TRCs that span all engine response RCs generated by a printer. Compensation RCs are constructible using reduced number of bases and clustered SVD weights.
Public/Granted literature
- US20100231942A1 METHODS AND SYSTEMS ACHIEVING PRINT UNIFORMITY USING REDUCED MEMORY OR COMPUTATIONAL REQUIREMENTS Public/Granted day:2010-09-16
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