分析了利用智能手机摄像头实现虚拟角规测树功能的原理,讨论了实像尺寸偏差和虚拟角规缺口的关系,给出了计算虚拟角规缺口在摄像头中的实像公式,并结合智能手机中的加速度传感器设计了虚拟角规自动改平功能,为开发智能手机在林业行业中的应用进行了有意尝试。
This paper analyzed the principles of realizing the functions of a virtual angle gauge by using smartphone lens,discussed the relationship between real image measurement and virtual angle gauge,gave the expression of real image measurement of virtual angle gauge in smartphone lens,and designed the function of automatic slope correction of virtual angle gauge by combining the acceleration transducer of smartphone.It provided a meaningful attempt to develop application in forestry industry by using smartphone.
[1]Bitterlich,W.The Relascope Idea:Relative Measurements in Forestry[M].Slough(England):Commonwealth Agricultural Bureau,1984:242.
[2]Grosenbaugh,L R.Point-sampling and line-sampling:Probability theory,geometric implications,synthesis[R].Southern Forest Experiment Station Occasional Paper 160,1958:34.
[3]Criterion RD 1000,The First Electronic Basal Area Factor-Scope and Dendrometer[EB/OL].[2015-03-09].http://www.lasertech.com/Criterion-RD-1000.asp.
[4]刘鹏举,周宇飞,唐小明.智能化森林资源数据采集PDA软件研究[J].北京林业大学学报,2007(2):105-110.
[5]刘新,张绍晨,孟庆祥,等.PDA森林资源数据采集软件的设计与实现[J].林业资源管理,2009(3):117-120.
[6]王六如,李崇贵.森林资源清查移动GIS系统研制[J].林业科学,2010,46(8):174-180.
[7]Android boy’s Lab.Smart Measure (ver 1.5)manual[EB/OL].[2015-03-09].http://androidboy1.blogspot.de/2010/10/smart-measure-ver-10-manual.html.
[8]VitorCesco.Camera Meter Support[EB/OL].[2015-03-09].http://camerametersupport.wordpress.com/.
[9]王文军,张山彪,杨兆华.光学[M].北京:科学出版社,2011.