Hierarchical static shadow detection method
    2.
    发明授权
    Hierarchical static shadow detection method 有权
    分层静态阴影检测方法

    公开(公告)号:US07826640B1

    公开(公告)日:2010-11-02

    申请号:US12111566

    申请日:2008-04-29

    IPC分类号: G06K9/00 H04N7/18

    CPC分类号: G06K9/342 G06K9/4652

    摘要: There is provided a hierarchical shadow detection system for color aerial images. The system performs well with highly complex images as well as images having different brightness and illumination conditions. The system consists of two hierarchical levels of processing. The first level involves, pixel level classification, through modeling the image as a reliable lattice and then maximizing the lattice reliability using the EM algorithm. Next, region level verification, through further exploiting the domain knowledge is performed. Further analyses show that the MRF model based segmentation is a special case of the pixel level classification model. A quantitative comparison of the system and a state-of-the-art shadow detection algorithm clearly indicates that the new system is highly effective in detecting shadow regions in an image under different illumination and brightness conditions.

    摘要翻译: 提供了一种用于彩色航空图像的分层阴影检测系统。 该系统对高度复杂的图像以及具有不同亮度和照明条件的图像表现良好。 该系统由两个层次级别的处理组成。 第一级涉及像素级别分类,通过将图像建模为可靠的格子,然后使用EM算法最大化格点可靠性。 接下来,通过进一步利用域知识进行区域级验证。 进一步的分析表明,基于MRF模型的分割是像素级分类模型的特例。 系统和最先进的阴影检测算法的定量比较清楚地表明,新系统在不同照明和亮度条件下检测图像中的阴影区域是非常有效的。

    Optical sensing in a directional MEMS microphone
    7.
    发明授权
    Optical sensing in a directional MEMS microphone 有权
    定向MEMS麦克风的光学感应

    公开(公告)号:US07826629B2

    公开(公告)日:2010-11-02

    申请号:US11335137

    申请日:2006-01-19

    CPC分类号: H04R23/008 H04R23/006

    摘要: A microphone having an optical component for converting the sound-induced motion of the diaphragm into an electronic signal using a diffraction grating. The microphone with inter-digitated fingers is fabricated on a silicon substrate using a combination of surface and bulk micromachining techniques. A 1 mm×2 mm microphone diaphragm, made of polysilicon, has stiffeners and hinge supports to ensure that it responds like a rigid body on flexible hinges. The diaphragm is designed to respond to pressure gradients, giving it a first order directional response to incident sound. This mechanical structure is integrated with a compact optoelectronic readout system that displays results based on optical interferometry.

    摘要翻译: 一种麦克风,其具有用于使用衍射光栅将振动膜的声音引起的运动转换为电子信号的光学部件。 具有数字化指状物的麦克风使用表面和体微加工技术的组合在硅衬底上制造。 由多晶硅制成的1 mm×2 mm麦克风隔膜具有加强件和铰链支撑,以确保其在柔性铰链上像刚体一样响应。 隔膜设计用于响应压力梯度,给予其对入射声音的一级定向响应。 该机械结构与紧凑型光电读出系统集成,该系统基于光学干涉测量显示结果。