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A precise zoom magnification is important for semiconductor industry and biomedical research. A novel measurement method is demonstrated for optical zoom magnification measurement in this paper. The magnification is obtained by pattern correction between barcode image formed by optical zoom and reference image generated by an ideal optical model. Measurement accuracy which is better than 0.06% has been achieved for optical zoom magnifica- tion. Compared with traditional concept, the measurement results are only dependent on two line edges. The barcode correlation method can achieve higher accuracy and better robustness by using the information over the whole field of view. 相似文献
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In this paper, a flexible high-precision calibration method suitable for industrial field was proposed. The complexity of the coordinate transformation was simplified by choosing the camera coordinate system as the unified reference coordinate system. A flexible planar calibration pattern was introduced to the calibration process, which can be arbitrarily placed and from which the known feature points can be extracted to construct other unknown feature points. With the known intrinsic parameters, the laser projector plane equation was fitted by the multi-noncollinear points, which were acquired through the principle of triangulation and the projective invariance of cross ratio. With this method, the strict alignment and multiple times of coordinate transformation can be avoided. Experimental results showed that the arithmetic mean of the root mean square （RMS） error of distance was 0.000 7 mm. 相似文献
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三维彩色扫描系统及算法 总被引：2，自引：0，他引：2
提出了一种大尺寸 3D物体几何形状的扫描测量系统 ,该系统由一个线结构光源和一个彩色CCD摄像机组成 .CCD摄像机两次摄取被扫描物体的图像 ,首先从激光平面中获取被扫描物体的三维信息 ,然后将 3D物体的彩色信息和三维信息自动进行叠合 ,以获得 3D物体的真实模型 . 相似文献
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