Halcon实战记录之三《模板制作--两点定位》

目的：计算被检测物体的位置和角度偏移
内容：

*创建模板read_image (Image1, 'D:/Program Files/MVTec/HALCON-12.0/examples/images/bottles/bottle_crate_01.png')dev_set_draw ('margin')*创建第一个模板gen_rectangle1 (mrect1, 83.3297, 63.4186, 142.725, 144.029)reduce_domain (Image1, mrect1, Model1)create_shape_model (Model1, 'auto', -3.14, 6.29, 'auto', 'auto', 'use_polarity', 'auto', 'auto', ModelID1)*创建第二个模板gen_rectangle1 (mrect2, 381.057, 79.7036, 438.948, 144.029)reduce_domain (Image1, mrect2, Model2)create_shape_model (Model2, 'auto', -3.14, 6.29, 'auto', 'auto', 'use_polarity', 'auto', 'auto', ModelID2)find_shape_model (Model1, ModelID1, -3.14, 6.29, 0.5, 1, 0.5, 'least_squares', 0, 0.9, Row1, Column1, Angle1, Score1)find_shape_model (Model2, ModelID2, -3.14, 6.29, 0.5, 1, 0.5, 'least_squares', 0, 0.9, Row2, Column2, Angle2, Score2)dev_display (Image1)gen_cross_contour_xld (Cross1, Row1, Column1, 20, Angle1)gen_cross_contour_xld (Cross2, Row2, Column2, 20, Angle2)dev_display (Cross1)dev_display (Cross1)gen_rectangle2 (TEST_ROI, 100.246, 416.396, rad(-0), 40.7125, 41.3)dev_display (TEST_ROI)*匹配read_image (Image2, 'D:/Program Files/MVTec/HALCON-12.0/examples/images/bottles/bottle_crate_04.png')reduce_domain (Image2, mrect1, ImageFor1)reduce_domain (Image2, mrect2, ImageFor2)find_shape_model (ImageFor1, ModelID1, -3.14, 6.29, 0.5, 1, 0.5, 'least_squares', 0, 0.9, RowFor1, ColumnFor1, AngleFor1, ScoreFor1)gen_cross_contour_xld (CrossFor1, RowFor1, ColumnFor1, 20, AngleFor1)dev_display (CrossFor1)find_shape_model (ImageFor2, ModelID2, -3.14, 6.29, 0.5, 1, 0.5, 'least_squares', 0, 0.9, RowFor2, ColumnFor2, AngleFor2, ScoreFor2)gen_cross_contour_xld (CrossFor2, RowFor2, ColumnFor2, 20, AngleFor2)dev_display (CrossFor2)angle_ll (Row1, Column1, Row2, Column2, RowFor1, ColumnFor1, RowFor2, ColumnFor2, Angle)vector_angle_to_rigid (Row1, Column1, 0, RowFor1,  ColumnFor1, Angle, HomMat2D)affine_trans_region (TEST_ROI, RegionAffineTrans, HomMat2D, 'nearest_neighbor')

1、其中Angle为匹配图和模板的相对旋转角度，可以以此获取匹配图中感兴趣ROI。
2、可以通过模板匹配的方法获取位置偏移量。

模板图：

匹配图：

备注：
1、保存模板的算子：write_shape_model( : : ModelID, FileName : )
2、加载模板的算子：read_shape_model( : : FileName : ModelID)
3、匹配后的score需要作出判断，避免某些情况下匹配失败导致数据不对，程序奔溃。
4、在创建模板的时候，可以自己先对该区域做阈值处理，获取更明晰的轮廓，再创建模板。