Active area identification on a machine readable form using form
landmarks
    4.
    发明授权
    Active area identification on a machine readable form using form landmarks 失效
    使用表单地标的机器可读形式的活动区域识别

    公开(公告)号:US5748809A

    公开(公告)日:1998-05-05

    申请号:US880202

    申请日:1997-06-23

    摘要: A forms creation and processing system which identifies and locates the active areas of a form using forms landmarks. The present invention eliminates the need to place predefined registration marks onto a machine readable form. The active areas of a form are those which may contain a user created mark, such as a checkbox or a signature box. A form is preanalyzed at the same time that the active areas are being described. The aim of the preanalysis is to find a set of graphic shapes, i.e. landmarks, that can be found on the form independent of their location or orientation in the image. Examples of such landmarks include paragraphs of text, heavy black lines and gray scale areas. The analysis looks at the geometric distribution and regularities of the connected components to choose a set of landmarks. The landmarks and active areas on the form are stored in a forms control file. A forms interpreter uses the forms control file to locate and examine the active areas of an instance of a form to determine if a mark has been placed thereon.

    摘要翻译: 表单创建和处理系统,使用表单地标识别和定位表单的活动区域。 本发明消除了将预定义的注册标记放置在机器可读形式上的需要。 表单的活动区域是可能包含用户创建标记的区域,例如复选框或签名框。 在形成活动区域的同时对表格进行预分析。 预分析的目的是找到一组图形形状,即地标,其可以在形式上找到,而与图像中的位置或取向无关。 这些地标的例子包括文字段,重黑线和灰度区。 分析考察了连接组件的几何分布和规律,以选择一组地标。 表单上的地标和活动区域存储在表单控制文件中。 表单解释器使用表单控制文件来定位和检查表单实例的活动区域,以确定是否已经在其上放置了标记。

    Two-way fluid pressure relief valve
    5.
    发明授权
    Two-way fluid pressure relief valve 失效
    双向液压安全阀

    公开(公告)号:US4033375A

    公开(公告)日:1977-07-05

    申请号:US684400

    申请日:1976-05-07

    IPC分类号: F16K15/04 F16K17/04 F16K15/00

    摘要: A two-way fluid pressure relief valve having a valve body and two valve seats therein and two valve closure pieces operable on the seats. Springs force the closure pieces against the seats, and the fluid pressure will act in both directions for removing the closures from the seats and causing fluid pressure relief. A movable member engages the closure pieces to remove them from the seats and to also fluid-tightly seal with them up to the point of fluid pressure relief created by the springs.

    摘要翻译: 一种具有阀体和两个阀座的双向流体压力释放阀,以及可在座上操作的两个阀关闭件。 弹簧将闭合件推压在座椅上,并且流体压力将沿两个方向起作用以从座椅上移除盖子并导致流体压力释放。 可移动构件与闭合件接合以将它们从座上移除,并且与它们流体密封,直到由弹簧产生的流体压力释放点。