CAJ | 학술논문

将靶标设定为一个辅助平面,建立辅助平面坐标系进行2步标定:第1步求取靶标面与像平面的对应透视关系;第2步求取空间坐标系与辅助平面坐标系的透视关系.研究结果表明:相对于传统标定法,该方法同时考虑径向畸变和切向畸变,提高了目标点定位精度;建立隐式数学模型而非直接标定摄像机内外参数,简化了标定.且将畸变量包含与隐式方程中不用实际求出畸变量,所以不要求靶标与摄像机成特殊位置;两步均用最小二乘法快速求解线性方程,简便快速;采用对特征圆标号的高精度标定模板,特征圆心可以精准提取,标定图像有较高的鲁棒性.
장파표설정위일개보조평면,건립보조평면좌표계진행2보표정:제1보구취파표면여상평면적대응투시관계;제2보구취공간좌표계여보조평면좌표계적투시관계.연구결과표명:상대우전통표정법,해방법동시고필경향기변화절향기변,제고료목표점정위정도;건립은식수학모형이비직접표정섭상궤내외삼수,간화료표정.차장기변량포함여은식방정중불용실제구출기변량,소이불요구파표여섭상궤성특수위치;량보균용최소이승법쾌속구해선성방정,간편쾌속;채용대특정원표호적고정도표정모판,특정원심가이정준제취,표정도상유교고적로봉성.
The method sets a assistant plane and establishes coordination on it.The process is divided into tow steps.The first step gets corresponding perspective relation between target plane and imaging plane.The second step gets perspective relation between assistant plane coordinate system and space coordinate system.By comparing with the traditional camera calibration methods,the method mentioned here takes full account of radial and tangential distortion to improve the location accuracy.To simplify the calibration,implicit model was used instead of calibrating parameters of the camera directly.The method does not consider distortion rather than embody the distortion in equation,that means the camera and the target must not be placed in special location.Step two does not refer to distortion.It is simple and fast to solve linear equations by using least squares.Using a special kind of central target,features can be extracted and the images of calibration have a high robustness.