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2D算法 Halcon 测量液体线高度

花匠小妙招
2024-12-05 15:37

本案例通过测量矩形测量液位线的位置来判断液体是装多了还是装少了。（测量矩形使用形状模板匹配定位跟随测量）

整体思路：

以瓶底为模板进行模板匹配
设定标准液线，高液线，低液线(瓶内液体在该范围内判定合格）
将测量矩形移动到测量位置进行测量
显示
dev_get_window (WindowHandle)
set_display_font (WindowHandle, 15, ‘mono’, ‘true’, ‘false’)
read_image (Image, ‘ampoules/ampoules_01’)

创建模板
get_image_size (Image, Width, Height)
gen_rectangle1 (ModelRegion, 264, 54, 321, 100)
reduce_domain (Image, ModelRegion, TemplateImage)
create_shape_model (TemplateImage, 3, rad(-5), rad(10), ‘auto’, [‘none’,‘no_pregeneration’], ‘use_polarity’, [25,54,4], 4, ModelID)
get_shape_model_contours (ModelContours, ModelID, 1)
NumImages := 8
for Index := 1 to NumImages by 1
read_image (Image, ‘ampoules/ampoules_’ + Index$‘.2d’)
* 寻找实例
find_shape_model (Image, ModelID, rad(-5), rad(10), 0.7, 0, 0.5, ‘least_squares’, [3,1], 0.75, Row, Column, Angle, Score)
MeanRows:=mean(Row)
Length1:=52
Length2:=20
gen_measure_rectangle2 (0, 0, rad(90), Length1, Length2,Width, Height, ‘nearest_neighbor’, MeasureHandle)
* 设置两条参考线
MeasureRow:=MeanRows-180
standard:=120//标准液线
offset:=20//允许液线偏移量
RefLineHigh:=standard-offset//高液线
RefLineLow:=standard+offset//低液线
dev_set_color (‘cyan’)
dev_set_line_width (1)
set_line_style (WindowHandle, 10)
gen_contour_polygon_xld (ContourLineHigh, [RefLineHigh,RefLineHigh], [0,Width])
gen_contour_polygon_xld (ContourLineLow, [RefLineLow,RefLineLow], [0,Width])
gen_contour_polygon_xld (ContourStand, [standard,standard], [0,Width])
dev_display (Image)
dev_display (ContourStand)
dev_display (ContourLineHigh)
dev_display (ContourLineLow)
for I := 0 to |Score| - 1 by 1
* 将测量矩形移动到测量位置
dev_set_line_width (3)
set_line_style (WindowHandle, 0)
* 转换度量对象
translate_measure (MeasureHandle, MeasureRow, Column[I])
measure_pos (Image, MeasureHandle, 2.6, 7, ‘all’, ‘all’, RowEdge, ColumnEdge, Amplitude, Distance)
if(|RowEdge|>0)
if(RowEdge<RefLineHigh)
dev_set_color (‘red’)
gen_contour_polygon_xld (Contour, [RowEdge,RowEdge], [ColumnEdge-24,ColumnEdge+24])
dev_display (Contour)
disp_message (WindowHandle, ‘超出’+(RefLineHigh-RowEdge), ‘image’, RowEdge, ColumnEdge-30, ‘red’, ‘false’)
elseif(RowEdge>RefLineLow)
dev_set_color (‘red’)
gen_contour_polygon_xld (Contour, [RowEdge,RowEdge], [ColumnEdge-24,ColumnEdge+24])
dev_display (Contour)
disp_message (WindowHandle, ‘低出’+(RowEdge-RefLineLow), ‘image’, RowEdge, ColumnEdge-30, ‘red’, ‘false’)
else
dev_set_color (‘green’)
gen_contour_polygon_xld (Contour, [RowEdge,RowEdge], [ColumnEdge-24,ColumnEdge+24])
dev_display (Contour)
endif
endif
endfor
stop()
endfor

在这里插入图片描述