公开(公告)号：US5304864A

公开(公告)日：1994-04-19

申请号：US927899

申请日：1992-08-07

Applicant: John H. Hong ,  Nan-Lei Wang

Inventor： John H. Hong ,  Nan-Lei Wang

IPC: G01R19/00 ,  H03K5/153 ,  H03K5/22

CPC classification number: G01R19/0038

Abstract: An electronic circuit is provided for comparing a plurality of input signals and indicating and/or selecting the maximum or minimum signal from the input set. The plurality of input signals are amplified, logarithmically compressed, and buffered by a corresponding plurality of simple transistor circuits, which are substantially identical. The buffered input signals are provided to a high resolution multiple input comparator circuit. The comparator circuit comprises a two-stage emitter-coupled comparator and a single stage inverter-amplifier. In the first comparator stage, strong input signals share the bias current but all the weak signals drop out. The inverter-amplifier stage amplifies the differences between the strong signals that survive the first comparison stage. The second stage comparator determines the strongest of the few remaining signals. With fewer competing signals, and enlarged voltage differences between them, the second stage comparator can determine the strongest of the original input signals with a high degree of resolution.

Abstract translation: 提供电子电路用于比较多个输入信号，并且从输入组指示和/或选择最大或最小信号。 多个输入信号由对应的多个简单的晶体管电路进行放大，对数压缩和缓冲，这些简单晶体管电路基本相同。 缓冲的输入信号被提供给高分辨率多输入比较器电路。 比较器电路包括两级发射极耦合比较器和单级反相放大器。 在第一个比较器级中，强输入信号共享偏置电流，但所有的弱信号都会退出。 逆变器放大器级放大在第一比较级之间存活的强信号之间的差异。 第二级比较器确定最少的几个剩余信号。 通过较少的竞争信号和它们之间的放大的电压差，第二级比较器可以以高分辨率确定最强的原始输入信号。

公开(公告)号：US5040864A

公开(公告)日：1991-08-20

申请号：US612343

申请日：1990-11-13

Applicant: John H. Hong

Inventor： John H. Hong

IPC: G02F1/313 ,  G02B5/32 ,  G02B6/43 ,  H04B10/02 ,  H04Q3/52 ,  H04Q11/00

CPC classification number: G02B6/43 ,  G02B5/32

Abstract: An optical crosspoint switch module is provided for a matrix of optical sources and receivers. The switch module includes a thin film waveguide atop a substrate, an array of input optical fibers aligned along one edge of the thin film waveguide, and a similar array of output fibers aligned along a second edge of the waveguide. The waveguide and/or the substrate comprise nonlinear optical material. A film containing a grating pattern to be written into the nonlinear medium as persistent but erasable holograms is placed above the waveguide. A spatial light modulator (SLM) is positioned above the patterned film and illuminated from above by either coherent or incoherent light. The SLM functions as a selective mask so that the grating pattern of the film can be written as holograms in selected areas of the nonlinear medium. The holograms written into the nonlinear medium diffract beams from the input fibers along the first edge of the waveguide to the output fibers along the second edge of the waveguide. After holograms have been written in the nonlinear medium to provide an input-to-output light beam distribution scheme, the holograms can be erased by uniform exposure of the nonlinear medium to a light source positioned below the medium. Thereafter, the light beam distribution scheme can be switched by changing the masking pattern of the SLM and writing new holograms in the nonlinear medium.

Abstract translation: 为光源和接收器的矩阵提供光交叉点开关模块。 开关模块包括在衬底顶部的薄膜波导，沿着薄膜波导的一个边缘排列的输入光纤的阵列，以及沿着波导的第二边缘排列的类似的输出光纤阵列。 波导和/或基板包括非线性光学材料。 将包含要写入非线性介质的光栅图案的胶片放置在波导上方，作为持久但可擦除的全息图。 空间光调制器（SLM）位于图案化膜上方，并通过相干或非相干光从上方照射。 SLM用作选择性掩模，使得膜的光栅图案可以被写为非线性介质的选定区域中的全息图。 写入非线性介质的全息图将沿着波导的第一边缘的输入光纤的波束衍射成沿着波导的第二边缘的输出光纤。 在非线性介质中写入全息图以提供输入到输出光束分布方案之后，通过将非线性介质均匀地曝光到位于介质下方的光源可以擦除全息图。 此后，可以通过改变SLM的掩模图案并在非线性介质中写入新的全息图来切换光束分配方案。

公开(公告)号：US09030391B2

公开(公告)日：2015-05-12

申请号：US13308349

申请日：2011-11-30

Applicant: John H. Hong ,  Chong U. Lee ,  Cheonhong Kim ,  Edward K. Chan

Inventor： John H. Hong ,  Chong U. Lee ,  Cheonhong Kim ,  Edward K. Chan

IPC: G09G3/34 ,  G02B26/00 ,  G09G3/32 ,  G02B26/08 ,  G02F1/157

CPC classification number: G09G3/3233 ,  G02B26/00 ,  G02B26/001 ,  G02B26/007 ,  G02B26/0833 ,  G02F1/157 ,  G09G3/3258 ,  G09G3/3466 ,  G09G2300/0426 ,  G09G2300/043 ,  G09G2300/0452 ,  G09G2300/0456 ,  G09G2300/0469 ,  G09G2300/0473 ,  G09G2320/0285 ,  G09G2320/0693 ,  G09G2340/16

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for accurately positioning a movable conductive layer of a reflective display element. In one aspect, an initial position of the movable conductive layer with respect to at least one or more fixed conductive layers is sensed. A charging voltage may be determined based at least in part on the initial position. The charging voltage may be applied to the movable conductive layer.

Abstract translation: 本公开提供了系统，方法和装置，包括在计算机存储介质上编码的计算机程序，用于精确地定位反射显示元件的可移动导电层。 在一个方面，感测可移动导电层相对于至少一个或多个固定导电层的初始位置。 可以至少部分地基于初始位置来确定充电电压。 充电电压可以施加到可移动导电层。

公开(公告)号：US08706711B2

公开(公告)日：2014-04-22

申请号：US13340024

申请日：2011-12-29

Applicant: Sundeep Vaddadi ,  Onur C. Hamsici ,  John H. Hong ,  Yuriy Reznik ,  Chong U. Lee

Inventor： Sundeep Vaddadi ,  Onur C. Hamsici ,  John H. Hong ,  Yuriy Reznik ,  Chong U. Lee

IPC: G06F17/30

CPC classification number: G06K9/6282 ,  G06K9/6228

Abstract: Various arrangements for using a k-dimensional tree for a search are presented. A plurality of descriptors may be stored. Each of the plurality of descriptors stored is linked with a first number of stored dimensions. The search may be performed using the k-dimensional tree for one or more query descriptors that at least approximately match one or more of the plurality of descriptors linked with the first number of stored dimensions. The k-dimensional tree may be built using the plurality of descriptors wherein each of the plurality of descriptors is linked with a second number of dimensions when the k-dimensional tree is built. The second number of dimensions may be a greater number of dimensions than the first number of stored dimensions.

Abstract translation: 提出了使用k维树进行搜索的各种布置。 可以存储多个描述符。 所存储的多个描述符中的每一个与存储维度的第一数量相关联。 可以使用k维树进行搜索，所述查询描述符至少近似地匹配与第一数量的存储维度相链接的多个描述符中的一个或多个。 可以使用多个描述符构建k维树，其中当构建k维树时，多个描述符中的每个描述符与第二数量的维度相关联。 第二数量的尺寸可以是比第一数量的存储尺寸更大的尺寸数量。

公开(公告)号：US08705876B2

公开(公告)日：2014-04-22

申请号：US12959056

申请日：2010-12-02

Applicant: Sundeep Vaddadi ,  John H. Hong ,  Onur C. Hamsici ,  Yuriy Reznik ,  Chong U. Lee

Inventor： Sundeep Vaddadi ,  John H. Hong ,  Onur C. Hamsici ,  Yuriy Reznik ,  Chong U. Lee

IPC: G06K9/62

CPC classification number: G06K9/6211

Abstract: A method for feature matching in image recognition is provided. First, image scaling may be based on a feature distribution across scale spaces for an image to estimate image size/resolution, where peak(s) in the keypoint distribution at different scales is used to track a dominant image scale and roughly track object sizes. Second, instead of using all detected features in an image for feature matching, keypoints may be pruned based on cluster density and/or the scale level in which the keypoints are detected. Keypoints falling within high-density clusters may be preferred over features falling within lower density clusters for purposes of feature matching. Third, inlier-to-outlier keypoint ratios are increased by spatially constraining keypoints into clusters in order to reduce or avoid geometric consistency checking for the image.

Abstract translation: 提供了图像识别中特征匹配的方法。 首先，图像缩放可以基于用于图像的尺度空间上的特征分布来估计图像尺寸/分辨率，其中使用不同尺度的关键点分布中的峰值来跟踪主要图像尺度并粗略跟踪对象尺寸。 其次，代替使用图像中的所有检测到的特征进行特征匹配，可以基于检测到关键点的聚类密度和/或比例级别来修剪关键点。 落入高密度群集中的关键点可能优于落入低密度群集中的特征，用于特征匹配。 第三，通过将关键点空间约束成簇，从而增加关键点比率，以减少或避免图像的几何一致性检查。

公开(公告)号：US08643936B2

公开(公告)日：2014-02-04

申请号：US13308324

申请日：2011-11-30

Applicant: John H. Hong ,  Marc Maurice Mignard

Inventor： John H. Hong ,  Marc Maurice Mignard

IPC: G02B26/00

CPC classification number: G02B26/001 ,  G02B26/02 ,  G02B26/06 ,  G02B26/08 ,  G02B26/0825 ,  G02B26/0833 ,  G02B26/0841 ,  G02B26/0875 ,  G02F1/01 ,  G02F1/0128 ,  G09G3/3433 ,  G09G3/3466 ,  G09G5/02

Abstract: This disclosure provides systems, methods and apparatus for providing white light color output from an electromechanical systems (EMS) device with reduced likelihood of stiction. In one aspect, interferometric modulators are configured to provide a white color output while having a non-zero modulator gap dimension. Such a feature can reduce problems associated with zero modulator gap dimensions such as stiction. Various methodologies can be used to yield such a non-zero modulator gap and a white color output. In some implementations, for example, an optical element that introduced wavelength dependent phase shift is used. In some implementations this wavelength dependent phase shifting optical element includes a stack of color filters, a hologram, a diffraction grating, or layers of material having specific thicknesses and wavelength dependent indices of refraction.

Abstract translation: 本公开提供了用于从机电系统（EMS）装置提供具有降低的静电可能性的白光输出的系统，方法和装置。 在一个方面，干涉式调制器被配置为提供白色输出，同时具有非零调制器间隙尺寸。 这样的特征可以减少与零调制器间隙尺寸相关联的问题，例如静摩擦。 可以使用各种方法来产生这样的非零调制器间隙和白色输出。 在一些实施方案中，例如，使用引入波长相关相移的光学元件。 在一些实施方案中，这种依赖于波长的相移光学元件包括滤色器，全息图，衍射光栅或具有特定厚度和波长相关折射率的材料层的堆叠。

公开(公告)号：US08582889B2

公开(公告)日：2013-11-12

申请号：US12986607

申请日：2011-01-07

Applicant: Sundeep Vaddadi ,  John H. Hong ,  Onur C. Hamsici ,  Chong U. Lee

Inventor： Sundeep Vaddadi ,  John H. Hong ,  Onur C. Hamsici ,  Chong U. Lee

IPC: G06K9/00

CPC classification number: G06K9/4671

Abstract: A normalization process is implemented at a difference of scale space to completely or substantially reduce the effect that illumination changes has on feature/keypoint detection in an image. An image may be processed by progressively blurring the image using a smoothening function to generate a smoothened scale space for the image. A difference of scale space may be generated by taking the difference between two different smoothened versions of the image. A normalized difference of scale space image may be generated by dividing the difference of scale space image by a third smoothened version of the image, where the third smoothened version of the image that is as smooth or smoother than the smoothest of the two different smoothened versions of the image. The normalized difference of scale space image may then be used to detect one or more features/keypoints for the image.

Abstract translation: 在尺度空间的差异上实现归一化过程以完全或基本上减少照明变化对图像中的特征/关键点检测的影响。 可以通过使用平滑函数逐渐模糊图像来生成图像来生成图像，以生成平滑的图像尺度空间。 可以通过获取图像的两个不同平滑版本之间的差异来产生比例空间的差异。 尺度空间图像的归一化差异可以通过将尺度空间图像的差除以图像的第三平滑版本而生成，其中图像的第三平滑版本比两个不同平滑版本中最平滑的平滑或平滑 的图像。 尺度空间图像的归一化差异可以用于检测图像的一个或多个特征/关键点。

公开(公告)号：US20130201210A1

公开(公告)日：2013-08-08

申请号：US13563330

申请日：2012-07-31

Applicant: Sundeep Vaddadi ,  Krishnakanth S. Chimalamarri ,  John H. Hong ,  Chong U. Lee

Inventor： Sundeep Vaddadi ,  Krishnakanth S. Chimalamarri ,  John H. Hong ,  Chong U. Lee

IPC: G06T19/00

CPC classification number: G06T19/006 ,  G01B11/25

Abstract: In some embodiments, first information indicative of an image of a scene is accessed. One or more reference features are detected, the reference features being associated with a reference object in the image. A transformation between an image space and a real-world space is determined based on the first information. Second information indicative of input from a user is accessed, the second information identifying an image-space distance in the image space corresponding to a real-world distance of interest in the real-world space. The real-world distance of interest is then estimated based on the second information and the determined transformation.

Abstract translation: 在一些实施例中，访问指示场景的图像的第一信息。 检测到一个或多个参考特征，参考特征与图像中的参考对象相关联。 基于第一信息确定图像空间与真实世界空间之间的变换。 访问指示来自用户的输入的第二信息，第二信息识别与真实世界空间中的真实世界距离相对应的图像空间中的图像空间距离。 然后基于第二信息和确定的变换来估计现实世界的兴趣距离。

公开(公告)号：US20130197793A1

公开(公告)日：2013-08-01

申请号：US13563387

申请日：2012-07-31

Applicant: Sundeep Vaddadi ,  John H. Hong ,  Chong U. Lee

Inventor： Sundeep Vaddadi ,  John H. Hong ,  Chong U. Lee

IPC: G06F17/00 ,  G01S15/08

CPC classification number: G01B21/02 ,  G01B11/00 ,  G01B11/02 ,  G01B11/026 ,  G01B11/028 ,  G01B21/22 ,  G01C15/002 ,  G01S7/4004 ,  G01S7/52004 ,  G01S13/08 ,  G01S15/08 ,  G06F17/00

Abstract: In some embodiments, methods and systems are provided for assisting a user in determining a real-world distance. Hardware-based sensors (e.g., present in a mobile electronic device) may allow for a fast low-power determination of distances. In one embodiment, one or more telemetry-related sensors may be incorporated into a device. For example, data detected by a frequently-calibrated integrated accelerometer may be used to determine a tilt of the device. A device height may be estimated based on empirical data or based on a time difference between a signal (e.g., a sonar signal) emitted towards the ground and a corresponding detected signal. A triangulation technique may use the estimated tilt and height to estimate other real-world distances (e.g., from the device to an endpoint or between endpoints).

公开(公告)号：US20120330967A1

公开(公告)日：2012-12-27

申请号：US13340024

申请日：2011-12-29

Applicant: Sundeep Vaddadi ,  Onur C. Hamsici ,  John H. Hong ,  Yuriy Reznik ,  Chong U. Lee

Inventor： Sundeep Vaddadi ,  Onur C. Hamsici ,  John H. Hong ,  Yuriy Reznik ,  Chong U. Lee

IPC: G06F17/30

CPC classification number: G06K9/6282 ,  G06K9/6228

Abstract: Various arrangements for using a k-dimensional tree for a search are presented. A plurality of descriptors may be stored. Each of the plurality of descriptors stored is linked with a first number of stored dimensions. The search may be performed using the k-dimensional tree for one or more query descriptors that at least approximately match one or more of the plurality of descriptors linked with the first number of stored dimensions. The k-dimensional tree may be built using the plurality of descriptors wherein each of the plurality of descriptors is linked with a second number of dimensions when the k-dimensional tree is built. The second number of dimensions may be a greater number of dimensions than the first number of stored dimensions.

Abstract translation: 提出了使用k维树进行搜索的各种布置。 可以存储多个描述符。 所存储的多个描述符中的每一个与存储维度的第一数量相关联。 可以使用k维树进行搜索，所述查询描述符至少近似地匹配与第一数量的存储维度相链接的多个描述符中的一个或多个。 可以使用多个描述符构建k维树，其中当构建k维树时，多个描述符中的每个描述符与第二数量的维度相关联。 第二数量的尺寸可以是比第一数量的存储尺寸更大的尺寸数量。