【issue-halcon例程学习】measure_arc.hdev

例程功能

 检查倒角后铸件的细长孔之间的距离。

代码如下

read_image (Zeiss1, 'zeiss1')
get_image_size (Zeiss1, Width, Height)
dev_close_window ()
dev_open_window (0, 0, Width / 2, Height / 2, 'black', WindowHandle)
set_display_font (WindowHandle, 14, 'mono', 'true', 'false')
dev_display (Zeiss1)
disp_continue_message (WindowHandle, 'black', 'true')
stop ()
* draw_circle (WindowHandle, Row, Column, Radius)
Row := 275
Column := 335
Radius := 107
AngleStart := -rad(55)
AngleExtent := rad(170)
dev_set_draw ('fill')
dev_set_color ('green')
dev_set_line_width (1)
get_points_ellipse (AngleStart + AngleExtent, Row, Column, 0, Radius, Radius, RowPoint, ColPoint)
disp_arc (WindowHandle, Row, Column, AngleExtent, RowPoint, ColPoint)
dev_set_line_width (3)
gen_measure_arc (Row, Column, Radius, AngleStart, AngleExtent, 10, Width, Height, 'nearest_neighbor', MeasureHandle)
disp_continue_message (WindowHandle, 'black', 'true')
stop ()
count_seconds (Seconds1)
n := 10
for i := 1 to n by 1
    measure_pos (Zeiss1, MeasureHandle, 1, 10, 'all', 'all', RowEdge, ColumnEdge, Amplitude, Distance)
endfor
count_seconds (Seconds2)
Time := (Seconds2 - Seconds1) / n
disp_continue_message (WindowHandle, 'black', 'true')
* stop ()
distance_pp (RowEdge[1], ColumnEdge[1], RowEdge[2], ColumnEdge[2], IntermedDist)
* dev_display (Zeiss1)
dev_set_color ('red')
* disp_circle (WindowHandle, RowEdge, ColumnEdge, RowEdge - RowEdge + 1)
disp_line (WindowHandle, RowEdge[1], ColumnEdge[1], RowEdge[2], ColumnEdge[2])
dev_set_color ('yellow')
disp_message (WindowHandle, 'Distance: ' + IntermedDist, 'image', 250, 80, 'yellow', 'false')
* dump_window (WindowHandle, 'tiff_rgb', 'C:\\Temp\\zeiss_result')
dev_set_line_width (1)
* disp_continue_message (WindowHandle, 'black', 'true')
stop ()
dev_clear_window ()

要点

1. gen_measure_arc ——采用圆弧arc作为测量区域，这是和上个例程不同的地方；
    CenterRow ：入参，圆弧中心的行坐标；
    CenterCol ：入参，圆弧中心的纵坐标；
    Radius ：入参，圆弧半径；
    AngleStart ：入参，弧度的起始角)以弧度为单位)；
    AngleExtent ：入参，弧度的角范围(以弧度为单位)；
    AnnulusRadius ：入参，圆弧环形半径；
    Width ：入参，待处理图像的宽度；
    Height ：入参，待处理图像的高度；
    Interpolation ：入参，插值的形式；
    MeasureHandle ：出参，测量对象句柄；
2. measure_pos——提取垂直于矩形或环形弧的直边；
    Image ：入参，输入图片；
    MeasureHandle ：入参，测量对象句柄；
    Sigma ：入参，高斯模糊参数；
    Threshold ：入参，最小边沿振幅；
    Transition ：入参，亮/暗或暗/亮边缘；
    Select ：入参，终点选择；
    RowEdge ：出参，边缘的中心行值(纵坐标)；
    ColumnEdge ：出参，边缘的中心列值(横坐标)；
    Amplitude ：出参，边的边缘振幅(带符号)；
    Distance ：出参，连续边之间的距离；
3. measure_pos返回的是一个数组，索引1为最小值，索引2为最大值，示例代码中用distance_pp取点计算了最短距离

	measure_pos (Zeiss1, MeasureHandle, 1, 10, 'all', 'all', RowEdge, ColumnEdge, Amplitude, Distance)
	distance_pp (RowEdge[1], ColumnEdge[1], RowEdge[2], ColumnEdge[2], IntermedDist)