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    Encoding optical spectra using a DMD array
    21.
    发明授权
    Encoding optical spectra using a DMD array 有权
    使用DMD阵列编码光谱

    公开(公告)号：US08144321B2

    公开(公告)日：2012-03-27

    申请号：US12256005

    申请日：2008-10-22

    Applicant: Walter M. Duncan ,  James N. Malina ,  Rajeev Ramanath

    Inventor： Walter M. Duncan ,  James N. Malina ,  Rajeev Ramanath

    IPC: G01J3/28

    CPC classification number: G01J3/02 ,  G01J3/021 ,  G01J3/0224 ,  G01J3/0229

    Abstract: According to one embodiment of the present invention, a system for encoding an optical spectrum includes a dispersive element, a digital micromirror device (DMD) array, a detector, and a controller. The dispersive element receives light from a source and disperses the light to yield light components of different wavelengths. The digital micromirror device (DMD) array has micromirrors that modulate the light to encode an optical spectrum of the light. The detector detects the light that has been modulated. The controller generates an intensity versus time waveform representing the optical spectrum of the detected light.

    Abstract translation: 根据本发明的一个实施例，用于编码光谱的系统包括色散元件，数字微镜器件（DMD）阵列，检测器和控制器。 分散元件接收来自光源的光，并分散光以产生不同波长的光分量。 数字微镜器件（DMD）阵列具有调制光以编码光的光谱的微镜。 检测器检测已调制的光。 控制器产生表示检测到的光的光谱的强度对时间波形。

    System and Method for Maintaining Hue Constancy
    22.
    发明申请
    System and Method for Maintaining Hue Constancy 有权
    维持色相常数的系统和方法

    公开(公告)号：US20090021809A1

    公开(公告)日：2009-01-22

    申请号：US11781121

    申请日：2007-07-20

    Applicant: Rajeev Ramanath

    Inventor： Rajeev Ramanath

    IPC: G03F3/08

    CPC classification number: H04N9/643

    Abstract: System and method for maintaining perceived hue constancy. A method for displaying an image includes receiving a color vector and associated image data, remapping the color vector to maintain a perceived hue constancy by adjusting a hue component of the color vector in response to a change in a lightness component or a chroma component of the color vector, providing the remapped color vector to a light source for display, and displaying image data associated with the color vector. The use of the constant hue curve ensures that the adjusting of the color vector maintains the perceived hue of the color vector, thereby helping to maintain image quality.

    Abstract translation: 维持感觉色彩恒定的系统和方法。 一种用于显示图像的方法包括：接收颜色矢量和相关联的图像数据，通过响应于亮度分量或色度分量的变化调整颜色矢量的色相分量，重新映射颜色矢量以维持感知色调恒定性 将重新映射的颜色矢量提供给用于显示的光源，以及显示与彩色矢量相关联的图像数据。 使用恒定色调曲线确保了颜色矢量的调整保持了颜色矢量的感知色调，从而有助于保持图像质量。

    System and method to control multiple inputs provided to a powered wheelchair
    25.
    发明授权
    System and method to control multiple inputs provided to a powered wheelchair 有权

    公开(公告)号：US12042443B2

    公开(公告)日：2024-07-23

    申请号：US17484332

    申请日：2021-09-24

    Applicant: Rajeev Ramanath

    Inventor： Rajeev Ramanath

    IPC: A61G5/04 ,  A61G5/10

    CPC classification number: A61G5/04 ,  A61G5/1051 ,  A61G2203/14 ,  A61G2203/22 ,  A61G2203/30

    Abstract: A system 1 for controlling a powered personal mobility vehicle 8. The system includes an input module 2, a processing unit 4, and a motor controller 7. The input module 2 receives manual triggers 3 regarding the movement of the personal mobility vehicle 8. The processing unit 4 processes a location information 5 or a distance information 6 at a given point in time, and further, either generate an automatic trigger 19, and disable or curtail the functioning of the input module 2, or enable the functioning of the input module 2. The location information 5 is defined as a location of an obstacle co-located in an environment in which the personal mobility vehicle 8 is placed or being driven, and the distance information 6 is defined as the distance of the obstacle from the vehicle 8 at a given point in time. The motor controller 7 receives and processes manual triggers 3 or automatic triggers 19 and controls movement of the personal mobility vehicle 8.

    SYSTEM AND METHOD TO COMBINE INPUT FROM MULTIPLE SENSORS ON AN AUTONOMOUS WHEELCHAIR
    26.
    发明申请
    SYSTEM AND METHOD TO COMBINE INPUT FROM MULTIPLE SENSORS ON AN AUTONOMOUS WHEELCHAIR 有权

    公开(公告)号：US20230095624A1

    公开(公告)日：2023-03-30

    申请号：US17485350

    申请日：2021-09-25

    Applicant: Rajeev Ramanath

    Inventor： Rajeev Ramanath ,  Ramin Nabati

    IPC: A61G5/04 ,  G05D1/02

    Abstract: The invention discloses a system for controlling the movement of a personal mobility vehicle. The system includes a processing unit that receives and processes a location data of one or more obstacles over a period of time and determines a change frequency of change of location of the obstacles during the period of time and further generates a movement state categorization of the obstacles categorizing them into either a dynamic obstacle or a static obstacle. The processing unit further determines a dynamic distance traveled by the dynamic obstacle during the period of time and also determines the velocity of the dynamic obstacle. Further, based on the change frequency of change of location, the processing unit determines the movement probability data that relates to the probability of movement of a static obstacle. And, based on the velocity of dynamic obstacles during various time intervals of the time period, the processing unit determines the velocity prediction data which relates to the prediction of the velocity of a dynamic obstacle.

    Eye scanner for user identification and security in an eyewear device
    28.
    发明授权
    Eye scanner for user identification and security in an eyewear device 有权

    公开(公告)号：US11138301B1

    公开(公告)日：2021-10-05

    申请号：US16188981

    申请日：2018-11-13

    Applicant: Julio Cesar Castañeda ,  Rajeev Ramanath

    Inventor： Julio Cesar Castañeda ,  Rajeev Ramanath

    IPC: G06K9/00 ,  G06F21/32 ,  G02B27/01

    Abstract: A system comprises an eyewear device that includes a frame, a temple connected to a lateral side of the frame, an infrared emitter, and an infrared camera. The infrared emitter and the infrared camera are connected to the frame or the temple to emit a pattern of infrared light. The system includes a processor coupled to the eyewear device, a memory accessible to the processor, and programming in the memory. Execution of the programming by the processor configures the system to perform functions, including functions to emit, via the infrared emitter, a pattern of infrared light on an eye of a user of the eyewear device; capture, via the camera, reflection variations in the pattern of infrared light on the eye of the user; and identify a user of the eyewear device based on the reflection variations of the emitted pattern of infrared light on the eye of the user.

    System and method for maintaining hue constancy
    29.
    发明授权
    System and method for maintaining hue constancy 有权
    保持色相恒定的系统和方法

    公开(公告)号：US08305666B2

    公开(公告)日：2012-11-06

    申请号：US13021728

    申请日：2011-02-05

    Applicant: Rajeev Ramanath

    Inventor： Rajeev Ramanath

    IPC: G03F3/08 ,  H04N1/60 ,  G06K9/00

    CPC classification number: H04N9/643

    Abstract: System and method for maintaining perceived hue constancy. A method for displaying an image includes receiving a color vector and associated image data, remapping the color vector to maintain a perceived hue constancy by adjusting a hue component of the color vector in response to a change in a lightness component or a chroma component of the color vector, providing the remapped color vector to a light source for display, and displaying image data associated with the color vector. The use of the constant hue curve ensures that the adjusting of the color vector maintains the perceived hue of the color vector, thereby helping to maintain image quality.

    Abstract translation: 维持感觉色彩恒定的系统和方法。 用于显示图像的方法包括：接收颜色矢量和相关联的图像数据，通过响应于亮度分量或色度分量的变化调整颜色矢量的色调分量来重新映射颜色矢量以维持感知色调恒定性 将重新映射的颜色矢量提供给用于显示的光源，以及显示与颜色矢量相关联的图像数据。 使用恒定色调曲线确保了颜色矢量的调整保持了颜色矢量的感知色调，从而有助于保持图像质量。

    System and method to generate multiprimary signals
    30.
    发明授权
    System and method to generate multiprimary signals 有权
    用于生成多原色信号的系统和方法

    公开(公告)号：US08305391B2

    公开(公告)日：2012-11-06

    申请号：US11604599

    申请日：2006-11-27

    Applicant: Rajeev Ramanath ,  Jeffrey Matthew Kempf

    Inventor： Rajeev Ramanath ,  Jeffrey Matthew Kempf

    IPC: G09G5/02

    CPC classification number: G09G5/06 ,  G09G3/2044 ,  G09G3/346 ,  G09G2320/0276

    Abstract: System and method for generating multiprimary signals with optimization for bit depth for use in display devices. A preferred embodiment comprises converting an input color signal into an output color signal, wherein the number of colors in the output color signal is less than a number of colors used in a display system, when a weighting of the input color signal is less than a specified threshold, and converting the input color signal into an output color signal, wherein the number of colors in the output color signal is equal to the number of colors used in the display system, when the weighting of the input color signal is greater than the specified threshold. The use of fewer colors eliminates low bit depth colors, allowing increased dither quality in dimmer images.

    Abstract translation: 用于生成多原色信号的系统和方法，具有用于显示设备的位深度优化。 优选实施例包括将输入彩色信号转换为输出彩色信号，其中输出彩色信号中的颜色数量小于在显示系统中使用的颜色数量，当输入彩色信号的加权小于 并且将输入颜色信号转换为输出颜色信号，其中输入颜色信号中的颜色数量等于显示系统中使用的颜色数量，当输入颜色信号的加权大于 指定阈值。 使用较少的颜色可以消除低位深度颜色，从而在调光图像中增加抖动质量。

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