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- W4385460669 abstract "A measurement method based on the homography matrix and partial area effect is studied to improve the precision of the visual measurement of the bearing size. Firstly, the camera is calibrated to obtain its distortion coefficient, and the image is corrected for distortion. Secondly, the relationship between the pixel plane and the bearing imaging plane is determined by solving the homography matrix with a chessboard. Finally, the sub-pixel edge contour of the bearing is obtained through the improved partial area effect, and the pixel coordinates are mapped to the world coordinates according to the homography matrix. The feature size is obtained by fitting the mapping points. Experimental results showed that the transformation of the homography matrix is more accurate than the pixel equivalent in the process of converting the pixel size to the actual size. The improved partial area effect sub-pixel edge detection results are better than the partial area effect and Zernike moment. The measurement error for the bearing outer diameter is less than 0.05 mm and is within 0.5 pixel." @default.
- W4385460669 created "2023-08-02" @default.
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- W4385460669 date "2023-08-01" @default.
- W4385460669 modified "2023-09-27" @default.
- W4385460669 title "Visual measurement of the bearing diameter based on the homography matrix and partial area effect" @default.
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- W4385460669 doi "https://doi.org/10.1177/09544062231189697" @default.
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