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  • halcon学习笔记——(7)HALCON标定后的二维测量

    1.gen_measure_rectangle2( : : Row, Column, Phi, Length1, Length2, Width, Height,Interpolation : MeasureHandle)

    产生测量矩形句柄,控制输入为测量矩形范围的坐标中心,矩形长轴和水平方向夹角范围的弧度,矩形边长的一半,测量图片的宽和高度,输出为测量句柄。

    2.measure_pairs(Image : : MeasureHandle, Sigma, Threshold, Transition, Select :RowEdgeFirst, ColumnEdgeFirst, AmplitudeFirst, RowEdgeSecond, ColumnEdgeSecond,AmplitudeSecond, IntraDistance, InterDistance)

    抽取和矩形主轴垂直的直线,返回第一类和第二类边缘点的行列坐标值,边缘分类由Transition的灰度差分决定。控制输出还有,一个边缘对之间的距离;以及一类边缘对相继边缘之间的距离。

    3.image_points_to_world_plane( : : CameraParam, WorldPose, Rows, Cols, Scale : X, Y)

    把像素坐标转化到世界坐标系中的Z=0平面中的X,Y坐标。控制输入为,相机内参数,标定的世界坐标位姿,测量单位,像素坐标,输出为Z=0平面的X,Y坐标。

    4.distance_pp( : : Row1, Column1, Row2, Column2 : Distance)

    利用两点距离公式计算两点之间的距离。

    注意用法:distance_pp (X1[0:4], Y1[0:4], X1[1:5], Y1[1:5], Distance)

    5.tuple_mean( : : Tuple : Mean) 返回数组的平均值。

    6.tuple_deviation( : : Tuple : Deviation) 返回数组中所有元素的标准差。

    对应的HALCON单相机标定后的测量程序段如下:

       1: calibrate_cameras (CalibDataID, Errors)
       2: get_calib_data (CalibDataID, 'camera', 0, 'params', CamParam)
       3: NumImage := 11
       4: get_calib_data (CalibDataID, 'calib_obj_pose', [0, NumImage], 'pose', Pose)
       5: * To take the thickness of the calibration plate into account, the z-value
       6: * of the origin given by the camera pose has to be translated by the
       7: * thickness of the calibration plate.
       8: * Deactivate the following line if you do not want to add the correction.
       9: set_origin_pose (Pose, 0, 0, 0.00075, Pose)
      10: * measure the distance between the pitch lines
      11: gen_measure_rectangle2 (195, 226, -0.526627271434, 174, 3, 652, 494, 'bilinear', MeasureHandle)
      12: measure_pairs (Image, MeasureHandle, 0.5, 5, 'all', 'all', RowEdgeFirst, ColumnEdgeFirst, AmplitudeFirst, RowEdgeSecond, ColumnEdgeSecond, AmplitudeSecond, IntraDistance, InterDistance)
      13: Row := (RowEdgeFirst+RowEdgeSecond)/2.0
      14: Col := (ColumnEdgeFirst+ColumnEdgeSecond)/2.0
      15: disp_cross (WindowHandle, Row, Col, 6, 0)
      16: image_points_to_world_plane (CamParam, Pose, Row, Col, 'mm', X1, Y1)
      17: distance_pp (X1[0:4], Y1[0:4], X1[1:5], Y1[1:5], Distance)
      18: tuple_mean (Distance, MeanDistance)
      19: tuple_deviation (Distance, DeviationDistance)
      20: disp_message (WindowHandle, 'Mean distance: '+MeanDistance$'.3f'+'mm +/- '+DeviationDistance$'.3f'+'mm', 'window', 30, 150, 'yellow', 'false')
      21: close_measure (MeasureHandle)
      22: clear_calib_data (CalibDataID)

    (以上代码出自solution_guide/3d_vision/camera_calibration_multi_image.hdev的部分)。

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  • 原文地址:https://www.cnblogs.com/hanzhaoxin/p/2847100.html
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