1.
    发明专利
    未知

    公开(公告)号:BRPI0501758A

    公开(公告)日:2006-01-10

    申请号:BRPI0501758

    申请日:2005-05-12

    Applicant: XEROX CORP

    Abstract: A streak detection method and system in a fixed imaging array digital scanning system obtains image data from each of the plurality of rows in the at least one full color spectrum channel set of rows of positionally discrete sensors and integrates this data to produce an estimate of image data recorded by at least one clear channel row of positionally discrete sensors. A clear channel error signal is generated by the comparison to alert the operator to the presence of non-image data. The clear channel error signal may be refined to through a low pass column filtering process in order to filter out potentially erroneous clear channel error resulting from thermal, mechanical or other noise sources unrelated to image scanning. Stationary obstructions in the field of view of the imaging array, or defects in one or more sensors in the imaging array, are detected through this comparison which would otherwise appear repeatedly reproduced as streaks or lines in the reproduced output image.

    4.
    发明专利
    未知

    公开(公告)号:DE602005016745D1

    公开(公告)日:2009-11-05

    申请号:DE602005016745

    申请日:2005-05-13

    Applicant: XEROX CORP

    Abstract: A streak detection method and system in a fixed imaging array digital scanning system obtains image data from each of the plurality of rows in the at least one full color spectrum channel set of rows of positionally discrete sensors and integrates this data to produce an estimate of image data recorded by at least one clear channel row of positionally discrete sensors. A clear channel error signal is generated by the comparison to alert the operator to the presence of non-image data. The clear channel error signal may be refined to through a low pass column filtering process in order to filter out potentially erroneous clear channel error resulting from thermal, mechanical or other noise sources unrelated to image scanning. Stationary obstructions in the field of view of the imaging array, or defects in one or more sensors in the imaging array, are detected through this comparison which would otherwise appear repeatedly reproduced as streaks or lines in the reproduced output image.

    System und Verfahren zur Testmusterbildung beim Drucken von 3D-Objekten

    公开(公告)号:DE102015218614A1

    公开(公告)日:2016-04-14

    申请号:DE102015218614

    申请日:2015-09-28

    Applicant: XEROX CORP

    Abstract: Ein 3D-Objektdrucker stößt Tropfen eines Werkstoffs aus einer Vielzahl von Düsen in einem ersten Druckkopf aus, um ein Objekt auf einem ersten Bereich eines Elements zu bilden, und stößt Tropfen eines Stützmaterials aus einer Vielzahl von Düsen in einem zweiten Druckkopf aus, um das Objekt auf dem ersten Bereich des Elements zu stützen. Der zweite Druckkopf stößt Tropfen des Stützmaterials auf einen zweiten Bereich des Elements aus, der vom ersten Bereich getrennt ist, um eine Substratschicht zu bilden. Der erste Druckkopf stößt Tropfen des Werkstoffs auf die Substratschicht aus, um ein gedrucktes Testmuster zu bilden. Ein Bildsensor generiert Bilddaten des gedruckten Testmusters, um eine defekte Düse im ersten Druckkopf zu erkennen.

    10.
    发明专利
    未知

    公开(公告)号:BR0200309A

    公开(公告)日:2002-10-29

    申请号:BR0200309

    申请日:2002-01-29

    Applicant: XEROX CORP

    Abstract: A photosensitive device, such as would be found in a digital scanner or camera, includes at least two sets of photosensors, the video signals from which are multiplexed together. While the two video paths are separate, before the multiplexing step, an offset correction process is carried out on each video path. After multiplexing, a final offset correction process is carried out to the combined signals, to remove offsets associated with the combined video path.

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