公开(公告)号：US20150145832A1

公开(公告)日：2015-05-28

申请号：US14473138

申请日：2014-08-29

Applicant: PIXART IMAGING INC.

Inventor： YU-CHIA LIN ,  YU-HSIANG HUANG

IPC: G06F3/041 ,  G06F3/042

CPC classification number: G06F3/0416 ,  G06F3/0428 ,  G06F2203/04101 ,  G06F2203/04104

Abstract: An optical touch system including a touch surface, a plurality of image sensors, a calculation unit and an identification unit is provided. The touch surface is for interactive operation with an object. Each of the image sensors is configured to capture an image frame looking across the touch surface. The calculation unit is configured to calculate a coordinate of the object and an operating depth of the object corresponding to each of the image sensors according to the image frame. The identification unit is configured to increase a count value when the coordinate is within an operable range of one of the image sensors and the operating depth corresponding to the image sensor exceeds a depth threshold to accordingly perform hovering identification according to the count value.

Abstract translation: 提供了包括触摸面，多个图像传感器，计算单元和识别单元的光学触摸系统。 触摸表面用于与物体进行交互操作。 每个图像传感器被配置为捕获跨越触摸表面的图像帧。 计算单元被配置为根据图像帧计算对象的坐标和对应于每个图像传感器的对象的操作深度。 识别单元被配置为当坐标在图像传感器之一的可操作范围内时增加计数值，并且与图像传感器相对应的操作深度超过深度阈值，从而根据计数值执行悬停识别。

公开(公告)号：US20150253934A1

公开(公告)日：2015-09-10

申请号：US14615670

申请日：2015-02-06

Applicant: PIXART IMAGING INC.

Inventor： YU-CHIA LIN ,  CHUAN-CHING LIN ,  YU-HSIN LIN ,  HAN-PING CHENG ,  TZUNG-MIN SU ,  CHIH-HSIN LIN ,  HSIN-CHI CHENG ,  CHUN-SHENG LIN ,  YU-HSIANG HUANG ,  KUAN-HSU CHEN ,  CHUN-YI LU

IPC: G06F3/042

CPC classification number: G06F3/0428 ,  G06F3/0418

Abstract: The present disclosure provides an object detection method including: pre-storing a lookup table of touch reference values, wherein the lookup table of touch reference values records a plurality of touch reference values associated with image positions of a plurality of calibration object images formed in calibration images captured by a first image sensor; capturing a first image, wherein the first image has at least an object image corresponding to a pointer formed therein; generating a first light distribution curve according to the first image; defining a first detection region in the first light distribution curve; obtaining at least one touch reference value associated with the object image using the lookup table of touch reference values; comparing at least one brightness value within the first detection region of the first light distribution curve with the at least one touch reference value obtained.

Abstract translation: 本公开提供一种对象检测方法，包括：预存储触摸参考值的查找表，其中所述触摸参考值的查找表记录与校准中形成的多个校准对象图像的图像位置相关联的多个触摸参考值 由第一图像传感器拍摄的图像; 拍摄第一图像，其中所述第一图像至少具有与其中形成的指针相对应的对象图像; 根据第一图像生成第一光分布曲线; 在第一光分布曲线中限定第一检测区域; 使用所述触摸参考值的查找表获得与所述对象图像相关联的至少一个触摸参考值; 将第一光分布曲线的第一检测区域内的至少一个亮度值与所获得的至少一个触摸参考值进行比较。

公开(公告)号：US20150212652A1

公开(公告)日：2015-07-30

申请号：US14567178

申请日：2014-12-11

Applicant: PIXART IMAGING INC.

Inventor： YU-CHIA LIN ,  CHIH-HSIN LIN

IPC: G06F3/042 ,  G06K9/46 ,  G06K9/00

CPC classification number: G06F3/0421 ,  G06K9/00355 ,  G06K9/2027 ,  G06K9/4661

Abstract: The present disclosure provides an optical touch system and an object analyzation method thereof. The optical touch system includes a panel and an image sensing apparatus installed thereon. The object analyzation method includes the following steps: capturing a first image across a touch surface of the panel with an image sensing apparatus, wherein the first image has an object image formed corresponding to the position of a pointer on the touch surface; defining an image window that corresponds to the image position of the object image in the first image captured; determining whether the pointer is touching the touch surface or hovering over the touch surface by analyzing the brightness difference among the plurality of pixels in the image window.

Abstract translation: 本公开提供了一种光学触摸系统及其对象分析方法。 光学触摸系统包括安装在其上的面板和图像感测装置。 对象分析方法包括以下步骤：利用图像感测装置跨越面板的触摸面捕获第一图像，其中第一图像具有对应于指示体在触摸表面上的位置形成的对象图像; 定义对应于所拍摄的第一图像中的对象图像的图像位置的图像窗口; 通过分析图像窗口中的多个像素之间的亮度差来确定指示器是触摸触摸表面还是在触摸表面上盘旋。