CAMERA-SYSTEM IMAGE GEOMETRICAL DISTORTION CORRECT AND LARGE TOUCH SCREEN
There are geometric distortions in all the images produced by the CCD camera lens, and the distortions are all nonlinear.Coordinate conversion is an effective method for geometric correction.The calculations will boost as the higher degrees of the polynomial.It is impossible to apply directly in real time correction system.This article introduces a correction according to divided areas through linear polynomial on the base of higher degree polynomial coordinate conversions.In the method the image is divided into uneven loop like areas at first.In each area you can take a linear polynomial approximating higher degree polynomial.Because CCD camera lens distortions are radial distortions,high precision can be acquired through the linear polynomial on the base of higher degree polynomial.In the same time the calculations can be decreased and meet the needs of real-time correction.Apply this method on large touch screen,it can correct the distortion effectively and is useful in engineering.
Geo Metric Distortions Real-Time Correction Large Touch Screen
Jisheng Xing Gang Wang Shigang Wang
Electrical & Information Engineering College,Beihua University,Jilin 132021,P.R.China School of Communication Engineering,Jilin University,Changchun 132020,P.R.China
国际会议
2009 International Symposium on Computer Science and Technology(2009 中国宁波国际计算机科学与技术学术大会)
宁波
英文
312-315
2009-11-20（万方平台首次上网日期，不代表论文的发表时间）