新的桶形畸变的点阵样板校正方法

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1、搜索关键词图像桶形畸变校正的研究与实现新的桶形畸变的点阵样板校正方法摘要:为了校正广角镜头的桶形畸变，提出一种新的桶形畸变数字校正方法。它使用点阵样板校正的方法，根据畸变图和理想图中圆点的位置关系，得出畸变图像素在x轴和y轴方向上的偏移量曲面，采用三次b插值函数对曲面插值;由曲面插值获取像素点的偏移量，对各像素进行坐标转换得到校正图像;然后对图像进行了双线性插值的灰度重建。仿真结果表明，该方法使图像的坐标位置和灰度都得到很好的校正。关键词:广角镜头；畸变校正；曲面插值；图像处理；桶形失真newmethodofcorrectingbarreldistortiono

2、nlatticemodelwukai.xing,duanma.li*schoolofinformationandelectricalengineering,hebeiuniversityofengineering,handanhebei056038,chinaabstract:inordertocorrectthebarreldistortionofwide.anglelens,anewmethodfordistortioncorrectionforbarreldistortionisproposed.thelatticemodelcalibrationmet

3、hodisused,accordingtothelocationrelationofdotbetweendistortionimageandidealfigure,togettheoffsetsurfaceinx.andy.axisdirectionaboutdistortedpixels.then,thecubicb.splineinterpolationfunctionisadoptedtointerpolatethesurface.thus,theoffsetsofeachpixelareobtainedinthedistortedimage.furthermo

4、re,thepixelsshiftisrectifiedtoachieveanundistortedimagebycoordinateconversion.andthenthebilinearinterpolationisusedtoreconstructthegraylevelofpixels.thesimulationresultsshowthattheproposedmethodcanmakeagoodcorrectionofthecoordinatepositionandgrayvalue.inordertocorrectthebarreldistortion

5、ofwide.anglelens,anewmethodfordistortioncorrectionforbarreldistortionwasproposed.adoptingthelatticemodelcalibrationmethod,accordingtothelocationrelationofdotsbetweendistortionimageandidealfigure,theoffsetsurfacesinx.andy.axisdirectionaboutdistortedpixelsweregot.then,thecubicb.splineinte

6、rpolationfunctionwasadoptedtointerpolatethesurface.thus,theoffsetsofeachpixelwereobtainedinthedistortedimage.furthermore,thepixelsshiftwasrectifiedtoachieveanundistortedimagebycoordinateconversion.andthenthebilinearinterpolationwasusedtoreconstructthegraylevelofpixels.thesimulationresul

7、tsshowthattheproposedmethodcanmakeagoodcorrectionofthecoordinatepositionandgrayvalue.keywords:wide.anglelens;distortioncorrection;surfaceinterpolation;imageprocessing;barreldistortion0引言目前，在图像处理系统中，具有宽视场的广角镜头有着广泛的用途，如电子内窥镜系统、车载监控系统、跟踪制导和违章驾驶拍摄等［1］。但是广角镜头在获得宽视场和特殊拍摄效果的同时，也带来