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    • 26. 发明申请
    • SYSTEM AND METHOD FOR SCENE CHANGE TRIGGERING
    • 用于场景变化触发的系统和方法
    • WO2010033886A2
    • 2010-03-25
    • PCT/US2009/057610
    • 2009-09-21
    • GTECH CORPORATIONCOURNOYER, Alexis, J.
    • COURNOYER, Alexis, J.
    • H04N1/00
    • G06K7/10722H04N1/00681H04N1/00689H04N1/00692H04N1/00694H04N1/00737H04N1/00753H04N1/00769H04N1/19594H04N2201/0436
    • A triggering system and process for a form reader is shown using a histogram of the optical scene. The form reader is open on three sides with a camera facing a platen on to which a form is placed. The camera converts the light rays reflected from the platen into a video stream that is sent to a processor. A change in content of a first light intensity level contrasted to the content of a second light intensity level is used to determine when the form enters the scene. Illustratively, the first light intensity level represents black levels and the second light intensity levels represent white levels. A threshold is pre-determined that isolates the first light intensity content, and when the first light intensity content remains constant (after the presence of a form) the form is deemed to be still wherein the system may then read the information on the form.
    • 使用光学场景的直方图示出用于表格阅读器的触发系统和处理。 表格阅读器的三面打开,相机面向放置模板的台板。 相机将从压板反射的光线转换为发送到处理器的视频流。 使用与第二光强度等级的内容形成对比的第一光强度等级的内容的变化来确定表格何时进入场景。 说明性地,第一光强度水平代表黑色水平,第二光强度水平代表白色水平。 阈值被预先确定为隔离第一光强度内容,并且当第一光强度内容保持恒定时(在表单存在之后),该表格被认为仍是其中系统可以读取表格上的信息。