?在Halcon進階【01】 幾何計量【矩形測量】一文中，講述最基本的幾何物體測量，本文講述對上個問題的擴充；遇到多個物體如何測量，這里先給出目標圖片和代碼：

下面代碼測量了矩形和園，請學習的同學將橢圓的代碼也加進去。

read_image (Image, 'rect3') rgb1_to_gray(Image,Image) create_metrology_model (MetrologyHandle) get_image_size (Image, Width, Height) set_metrology_model_image_size (MetrologyHandle, Width, Height) add_metrology_object_rectangle2_measure (MetrologyHandle, 172.3, 239.2, rad(11.609), 146.7, 50.9, 10, 2, 1, 30, [], [], Index)add_metrology_object_circle_measure(MetrologyHandle, 73.2, 105.746, 40.497, 10, 4, 1, 30, [], [], Index1)apply_metrology_model (Image, MetrologyHandle)get_metrology_object_result (MetrologyHandle, Index, 'all', 'result_type', 'all_param', Rectangle) get_metrology_object_result_contour (Contour, MetrologyHandle, Index, 'all', 1.5)get_metrology_object_result (MetrologyHandle, Index1, 'all', 'result_type', 'all_param', Circle) get_metrology_object_result_contour (Contour, MetrologyHandle, Index1, 'all', 1.5) clear_metrology_model (MetrologyHandle)

本文給出兩個被測量物體，然后用相同方式進行測量，讀者可以對照兩文，將圖中的橢圓測量也加進去。這樣，基本的套路您已經掌握了。

將上述代碼改成下面樣子（僅僅追加了兩句語句）：

read_image (Image, 'rect3') rgb1_to_gray(Image,Image) create_metrology_model (MetrologyHandle) get_image_size (Image, Width, Height) set_metrology_model_image_size (MetrologyHandle, Width, Height) add_metrology_object_rectangle2_measure (MetrologyHandle, 172.3, 239.2, rad(11.609), 146.7, 50.9, 10, 2, 1, 30, [], [], Index)add_metrology_object_circle_measure(MetrologyHandle, 73.2, 105.746, 40.497, 10, 4, 1, 30, [], [], Index1) apply_metrology_model (Image, MetrologyHandle)get_metrology_object_result (MetrologyHandle, Index, 'all', 'result_type', 'all_param', Rectangle) get_metrology_object_result_contour (Contour, MetrologyHandle, Index, 'all', 1.5)get_metrology_object_result (MetrologyHandle, Index1, 'all', 'result_type', 'all_param', Circle) get_metrology_object_result_contour (Contour, MetrologyHandle, Index1, 'all', 1.5)get_metrology_object_measures (Contour, MetrologyHandle, 'all', 'all', Row1, Column1) gen_cross_contour_xld (Cross, Row1, Column1, 6, 0.785398)clear_metrology_model (MetrologyHandle)

結果如下：

這個結果表明，無論測量矩形幾何參量，或是園的幾何參量，都是通過微小的測量矩形進行邊界采樣完成的。

總結

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