Facsimile and static presentation processing – Natural color facsimile – Measuring – testing – and calibrating
Reexamination Certificate
2007-09-04
2007-09-04
Grant, II, Jerome (Department: 2625)
Facsimile and static presentation processing
Natural color facsimile
Measuring, testing, and calibrating
C358S406000, C356S401000
Reexamination Certificate
active
10326622
ABSTRACT:
A target, method, and apparatus are disclosed for measuring assembly and alignment errors in scanner sensor assemblies. The sensor assembly comprises at least two sensor segments. The target comprises edges defined by changes in reflectance. At least one vertical edge corresponds to each sensor segment, and can be detected only by its corresponding segment, even when the segments are misaligned to the maximum extent of their placement tolerances. The target may optionally comprise a horizontal edge spanning the sensor segments. The target is scanned, and the resulting digital image is analyzed to detect the apparent locations of the target edges. The apparent edge locations provide sufficient information to locate the sensor segments. The target may optionally be incorporated into a scanner, or into a separate alignment fixture. The analysis may be performed in a scanner, in a fixture, or in a host computer attached to a scanner or a fixture.
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U.S. Pending Application, “Digital Image Scanner With Compensation For Misalignment Of Photosensor Array Segments,” U.S. Appl. No. 09/365,112, filed Jul. 30, 1999, Steven J. Kommrusch and Randy T. Crane, HP PDNO 10990561-1.
Harris Rodney C.
Spears Kurt E.
Grant II Jerome
Hewlett--Packard Development Company, L.P.
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