• Halcon


    以直线卡尺为例,其他卡尺更改相应参数即可。

    Code

    直线卡尺

    * 获取图像及图像尺寸
    dev_close_window ()
    read_image (Image, 'fabrik')
    get_image_size (Image, Width, Height)
    dev_open_window_fit_image (Image, 0, 0, -1, -1, WindowHandle)
    dev_set_line_width (1)
    dev_display (Image)
    
    * 标记测量位置
    draw_line (WindowHandle, Row1, Column1, Row2, Column2)
    LineParams := [Row1, Column1, Row2, Column2]
    
    * 创建测量句柄
    create_metrology_model (MetrologyHandle)
    * 添加测量对象
    set_metrology_model_image_size (MetrologyHandle, Width, Height)
    add_metrology_object_generic (MetrologyHandle, 'line', LineParams, 20, 3, 1, 30, [], [], Index)
    
    * 设置测量对象的参数
    * set_metrology_object_param (MetrologyHandle, 'all', 'measure_transition', 'negative')
    * set_metrology_object_param (MetrologyHandle, 'all', 'num_measures',10)
    * set_metrology_object_param (MetrologyHandle, 'all', 'num_instances', 1)
    * set_metrology_object_param (MetrologyHandle, 'all', 'measure_sigma', 1)
    * set_metrology_object_param (MetrologyHandle, 'all', 'measure_length1', 20)
    * set_metrology_object_param (MetrologyHandle, 'all', 'measure_length2', 5)
    * set_metrology_object_param (MetrologyHandle, 'all', 'measure_threshold',30)
    * set_metrology_object_param (MetrologyHandle, 'all', 'measure_interpolation', 'bicubic')
    * set_metrology_object_param (MetrologyHandle, 'all', 'measure_select', 'all')
    * set_metrology_object_param (MetrologyHandle, 'all', 'min_score', 0.7)
    
    * 执行测量,获取边缘点集
    dev_set_color ('yellow')
    apply_metrology_model (Image, MetrologyHandle)
    get_metrology_object_measures (Contours, MetrologyHandle, 'all', 'all', Row, Column)
    dev_set_color ('red')
    gen_cross_contour_xld (Cross, Row, Column, 6, 0.785398)
    
    * 获取最终测量数据和轮廓线
    dev_set_color ('green')
    dev_set_line_width (2)
    get_metrology_object_result (MetrologyHandle, 'all', 'all', 'result_type', 'all_param', Parameter)
    get_metrology_object_result_contour (Contour, MetrologyHandle, 'all', 'all', 1.5)
    
    * 释放测量句柄
    clear_metrology_model (MetrologyHandle)
    

    Result

    Explanation

    set_metrology_model_image_size( : : MetrologyHandle, Width, Height : )

    使用 set_metrology_model_image_size 该算子设置测量区域,而且该算子必须在 add_metrology_object_generic 这类添加测量对象的算子之前调用,否则在使用 apply_metrology_model 执行测量时会重新计算测量区域,降低效率。

    add_metrology_object_generic( : : MetrologyHandle, Shape, ShapeParam, MeasureLength1, MeasureLength2, MeasureSigma, MeasureThreshold, GenParamName, GenParamValue : Index)

    参数 Shape 和 ShapeParam 是联动的:

    • Shape = circle 时,ShapeParam=[Row, Column, Radius]
    • Shape = rectangle2 时,ShapeParam=[Row, Column, Phi, Length1, Length2]
    • Shape = ellipse 时,ShapeParam=[Row, Column, Phi, Radius1, Radius2]
    • Shape = line 时,ShapeParam=[RowBegin, ColumnBegin, RowEnd, ColumnEnd]

    set_metrology_object_param( : : MetrologyHandle, Index, GenParamName, GenParamValue : )

    创建测量区域的相关参数

    • measure_length1:The value of this parameter specifies the half length of the measure regions perpendicular to the metrology object boundary.
    • measure_length2:The value of this parameter specifies the half length of the measure regions tangential to the metrology object boundary.
    • measure_distance:The value of this parameter specifies the desired distance between the centers of two measure regions.
    • num_measures:The value of this parameter specifies the desired number of measure regions.

    提取边缘的相关参数

    • measure_sigma:The parameter specifies the sigma for the Gaussian smoothing.
    • measure_threshold:The parameter specifies the minimum edge amplitude.
    • measure_select:The parameter specifies the selection of end points of the edges.
    • measure_transition:The parameter specifies the use of dark/light or light/dark edges.
    • measure_interpolation:The parameter specifies the type of interpolation to be used.

    拟合几何形状的相关参数

    • min_score: The parameter determines what score a potential instance must at least have to be regarded as a valid instance of the metrology object.
    • num_instances: The parameter specifies the maximum number of successfully fitted instances of each metrology object after which the fitting will stop.
    • distance_threshold: apply_metrology_model uses a randomized search algorithm (RANSAC) to fit the geometric shapes.
    • max_num_iterations: The RANSAC algorithm estimates the number of iterations necessary for fitting the requested geometric shape.
    • rand_seed: The parameter specifies the seed for the random number generator for the RANSAC algorithm that is used by the selection of the edges the in operator apply_metrology_model.
    • instances_outside_measure_regions: The parameter specifies the validation of the results of measurements.
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  • 原文地址:https://www.cnblogs.com/zdfffg/p/11572249.html
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