公开(公告)号：US20140210725A1

公开(公告)日：2014-07-31

申请号：US14067632

申请日：2013-10-30

Applicant: PIXART IMAGING INC.

Inventor： Yu-Ju LEE ,  Tzu-Yu CHEN

IPC: G06F3/0354 ,  G06F3/03

CPC classification number: G06F3/03543 ,  G06F3/0317 ,  G06T7/223 ,  G06T2207/20008 ,  G06T2207/30168

Abstract: An optical navigation apparatus, an optical navigation method, and a non-transitory computer readable medium thereof are provided. The optical navigation apparatus includes a light source unit, an image sensing unit, and a processing unit. The processing unit is electrically connected to the light source unit and the image sensing unit. The light source unit provides a beam of light. The image sensing unit captures a first image at a first time instant when the light is projected onto a reflection surface. The processing unit calculates an image quality index of the first image and determines a matching block size between the first image and a second image according to the image quality index.

Abstract translation: 提供了一种光学导航装置，光学导航方法及其非暂时计算机可读介质。 光学导航装置包括光源单元，图像感测单元和处理单元。 处理单元电连接到光源单元和图像感测单元。 光源单元提供光束。 当光投射到反射表面上时，图像感测单元在第一时刻捕获第一图像。 处理单元计算第一图像的图像质量指数，并根据图像质量指数确定第一图像和第二图像之间的匹配块大小。

公开(公告)号：US20180348373A1

公开(公告)日：2018-12-06

申请号：US15841376

申请日：2017-12-14

Applicant: PixArt Imaging Inc.

Inventor： Hui-Hsuan CHEN ,  Cheng-Lin YANG ,  Tzu-Yu CHEN

IPC: G01S17/66 ,  H04N5/225 ,  G06T7/521 ,  G01S17/50

Abstract: A tracking device including an image sensor, a light source and a processor is provided. The image sensor senses reflected light or scattered light formed by the light source illuminating a work surface. The processor calculates a trace of the tracking device according to one of the reflected light and the scattered light that generates more apparent image features so as to increase the adaptable work surfaces.

公开(公告)号：US20140111437A1

公开(公告)日：2014-04-24

申请号：US14047542

申请日：2013-10-07

Applicant: PixArt Imaging Inc

Inventor： Tzu-Yu CHEN

IPC: G06F3/0354

CPC classification number: G06F3/03543 ,  G06F3/0317

Abstract: An optical navigation device includes a light source, an image sensor, a navigation unit and a lift detection unit. The light source is configured to illuminate a work surface. The image sensor receives reflected light from the work surface to output an image frame. The navigation unit is configured to filter the image frame and output a filtered image frame. The lift detection unit is configured to calculate a maximum difference of intensities between two adjacent pixels in the image frame, calculate a pixel number of pixels of interest in the filtered image frame, and identify a lift event by comparing the maximum difference with a difference threshold and/or comparing the pixel number with an operating threshold.

Abstract translation: 光学导航装置包括光源，图像传感器，导航单元和升降检测单元。 光源被配置为照亮工作表面。 图像传感器接收来自工作表面的反射光，以输出图像帧。 导航单元被配置为过滤图像帧并输出经滤波的图像帧。 升降检测单元被配置为计算图像帧中的两个相邻像素之间的最大强度差，计算滤波图像帧中的感兴趣像素的像素数，并通过将最大差与差阈值进行比较来识别提升事件 和/或将像素数与操作阈值进行比较。