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。