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：US20140225868A1

公开(公告)日：2014-08-14

申请号：US14040201

申请日：2013-09-27

Applicant: Pixart Imaging Inc.

Inventor： YU-HSIANG HUANG ,  CHUN-YI LU ,  TZUNG-MIN SU ,  CHIH-HSIN LIN ,  JIA-HONG HUANG

IPC: G06F3/042 ,  G02B13/14 ,  G02B13/18

CPC classification number: G02B13/18 ,  G02B19/0014 ,  G02B19/0061 ,  G06F3/0428

Abstract: An optical lens is configured in front of an image-capturing lens of an image-capturing device. A light-emitting unit of the image-capturing device emits a light beam. The optical lens includes a pair of peripheral compensation portions and a central diverging portion. Each peripheral compensation portion has a first convex surface and a first concave surface arranged opposite to the first convex surface. The central diverging portion is arranged between the peripheral compensation portions, and has a second concave surface and an oppositely arranged light incident surface. The second concave surface is arranged between the first convex surfaces. The light incident surface is arranged between the first concave surfaces. The optical axis of the light beam sequentially aligns with the light incident surface and the second concave surface. The light rays of the light beam pass through the first concave surface and the first convex surface in sequence.

Abstract translation: 光学透镜配置在图像拍摄装置的图像拍摄透镜的前方。 图像捕获装置的发光单元发射光束。 光学透镜包括一对外围补偿部分和中心发散部分。 每个外围补偿部分具有与第一凸面相对布置的第一凸面和第一凹面。 中心发散部分配置在周边补偿部之间，具有第二凹面和相对配置的光入射面。 第二凹面设置在第一凸面之间。 光入射面设置在第一凹面之间。 光束的光轴顺序地与光入射面和第二凹面对准。 光束的光线依次穿过第一凹面和第一凸面。