Halcon 算子 select_shape- 借助形状特征选择区域（选择轮廓）
select_shape - 借助形状特征选择区域。
原型：
select_shape(Regions : SelectedRegions : Features, Operation, Min, Max : )
（将连接的区域进行筛选，筛选的特征有很多，如面积长度等，可以去掉不满足条件的轮廓）
描述：
操作符select_shape根据形状选择区域。对于来自区域的每个输入区域，计算所指示的特征（features）。如果计算特征的每个（Operation='and'）或至少一个（Operation='or'）在默认限制（最小值、最大值）内，则该区域将适应输出（复制）。
条件：Min_i <= Feature_i(Object) <= Max_i
功能特征的取值：
| 特征 | 英 | 译 | 备注 |
| area | Area of the object | 对象的面积 | |
| row | Row index of the center | 中心点的行坐标 | |
| column | Column index of the center | 中心点的列坐标 | |
| width | Width of the region | 区域的宽度 | |
| height | Height of the region | 区域的高度 | |
| row1 | Row index of upper left corner | 左上角行坐标 | |
| column1 | Column index of upper left corner | 左上角列坐标 | |
| row2 | Row index of lower right corner | 右下角行坐标 | |
| column2 | Column index of lower right corner | 右下角列坐标 | |
| circularity | Circularity | 圆度 | 0~1 |
| compactness | Compactness | 紧密度 | 0~1 |
| contlength | Total length of contour | 轮廓线总长 | |
| convexity | Convexity | 凸性 | |
| rectangularity | Rectangularity | 矩形度 | 0~1 |
| ra | Main radius of the equivalent ellipse | 等效椭圆长轴半径长度 | |
| rb | Secondary radius of the equivalent ellipse | 等效椭圆短轴半径长度 | |
| phi | Orientation of the equivalent ellipse | 等效椭圆方向 | |
| anisometry | Anisometry | 椭圆参数，Ra/Rb长轴与短轴的比值 | |
| bulkiness | Bulkiness | 椭圆参数，蓬松度π*Ra*Rb/A | |
| struct_factor | Structur Factor | 椭圆参数，Anisometry*Bulkiness-1 | |
| outer_radius | Radius of smallest surrounding circle | 最小外接圆半径 | |
| inner_radius | Radius of largest inner circle | 最大内接圆半径 | |
| inner_width | Width of the largest axis-parallel rectangle that fits into the region | 最大内接矩形宽度 | |
| inner_height | Height of the largest axis-parallel rectangle that fits into the region | 最大内接矩形高度 | |
| dist_mean | Mean distance from the region border to the center | 区域边界到中心的平均距离 | |
| dist_deviation | Deviation of the distance from the region border from the center | 区域边界到中心距离的偏差 | |
| roundness | Roundness | 圆度，与circularity计算方法不同 | |
| num_sides | Number of polygon sides | 多边形边数 | |
| connect_num | Number of connection components | 连通数 | |
| holes_num | Number of holes | 区域内洞数 | |
| area_holes | Area of the holes of the object | 所有洞的面积 | |
| max_diameter | Maximum diameter of the region | 最大直径 | |
| orientation | Orientation of the region | 区域方向 | |
| euler_number | Euler number | 欧拉数，即连通数和洞数的差 | |
| rect2_phi | Orientation of the smallest surrounding rectangle | 最小外接矩形的方向 | |
| rect2_len1 | Half the length of the smallest surrounding rectangle | 最小外接矩形长度的一半？？ | smallest_rectangle2 |
| rect2_len2 | Half the width of the smallest surrounding rectangle | 最小外接矩形宽度的一半 | |
| moments_m11 | Geometric moments of the region | 几何矩 | |
| moments_m20 | Geometric moments of the region | 几何矩 | |
| moments_m02 | Geometric moments of the region | 几何矩 | |
| moments_ia | Geometric moments of the region | 几何矩 | |
| moments_ib | Geometric moments of the region | 几何矩 | |
| moments_m11_invar | Geometric moments of the region | 几何矩 | |
| moments_m20_invar | Geometric moments of the region | 几何矩 | |
| moments_m02_invar | Geometric moments of the region | 几何矩 | |
| moments_phi1 | Geometric moments of the region | 几何矩 | |
| moments_phi2 | Geometric moments of the region | 几何矩 | |
| moments_m21 | Geometric moments of the region | 几何矩 | |
| moments_m12 | Geometric moments of the region | 几何矩 | |
| moments_m03 | Geometric moments of the region | 几何矩 | |
| moments_m30 | Geometric moments of the region | 几何矩 | |
| moments_m21_invar | Geometric moments of the region | 几何矩 | |
| moments_m12_invar | Geometric moments of the region | 几何矩 | |
| moments_m03_invar | Geometric moments of the region | 几何矩 | |
| moments_m30_invar | Geometric moments of the region | 几何矩 | |
| moments_i1 | Geometric moments of the region | 几何矩 | |
| moments_i2 | Geometric moments of the region | 几何矩 | |
| moments_i3 | Geometric moments of the region | 几何矩 | |
| moments_i4 | Geometric moments of the region | 几何矩 | |
| moments_psi1 | Geometric moments of the region | 几何矩 | |
| moments_psi2 | Geometric moments of the region | 几何矩 | |
| moments_psi3 | Geometric moments of the region | 几何矩 | |
| moments_psi4 | Geometric moments of the region | 几何矩 |
参数：
- Regions (input_object) region-array → object //要检查的区域
- SelectedRegions (output_object) region-array → object //符合条件的区域
- Features (input_control) string(-array) → (string) //要检查的形状特征
- 默认值: 'area'
- 值列表: 'area', 'row', 'column', 'width', 'height', 'row1', 'column1', 'row2', 'column2', 'circularity', 'compactness', 'contlength', 'convexity', 'rectangularity', 'ra', 'rb', 'phi', 'anisometry', 'bulkiness', 'struct_factor', 'outer_radius', 'inner_radius', 'inner_width', 'inner_height', 'max_diameter', 'dist_mean', 'dist_deviation', 'roundness', 'num_sides', 'orientation', 'connect_num', 'holes_num', 'area_holes', 'euler_number', 'rect2_phi', 'rect2_len1', 'rect2_len2', 'moments_m11', 'moments_m20', 'moments_m02', 'moments_ia', 'moments_ib', 'moments_m11_invar', 'moments_m20_invar', 'moments_m02_invar', 'moments_phi1', 'moments_phi2', 'moments_m21', 'moments_m12', 'moments_m03', 'moments_m30', 'moments_m21_invar', 'moments_m12_invar', 'moments_m03_invar', 'moments_m30_invar', 'moments_i1', 'moments_i2', 'moments_i3', 'moments_i4', 'moments_psi1', 'moments_psi2', 'moments_psi3', 'moments_psi4'
- Operation (input_control) string → (string) //单个特征的链接类型
- 默认值: 'and'
- 值列表: 'and', 'or'
- Min (input_control) real(-array) → (real / integer / string) //特征下限 ，最小值
- 默认值: 150.0
- 典型取值范围: 0.0 ≤ Min ≤ 99999.0
- 最小增量: 0.001
- 建议增量: 1.0
- Max (input_control) real(-array) → (real / integer / string) //特征上限，最大值
- 默认值: 99999.0
- 典型取值范围: 0.0 ≤ Max ≤ 99999.0
- 最小增量: 0.001
- 建议增量: 1.0
- 限制: Max >= Min //Max必须大于等于Min ，否则报错
示例：
read_image(Image,'monkey') threshold(Image,S1,160,255) connection(S1,S2) select_shape(S2,Eyes,['area','anisometry'],'and',[500,1.0],[50000,1.7]) disp_region(Eyes,WindowHandle)
创建时间：2021.01.17 更新时间：