在做项目时，之前使用的是某康的智能读码器，综合考虑成本，可通过相机拍照来读取图片的二维码，我这边用Halcon来实现。
Halcon代码如下：
1 *创建模型
2 create_data_code_2d_model('Data Matrix ECC 200', [], [], DataCodeHandle)
3
4 *设置条码极性
5 set_data_code_2d_param(DataCodeHandle, 'polarity', 'any')
6
7 *解码时长的设置，超时直接将条码丢弃
8 set_data_code_2d_param(DataCodeHandle, 'timeout', 200)
9
10 *开始二维码识别
11 read_image (Image, 'C:/Users/Administrator/Desktop/AirPods/Image_20220815110012088.bmp')
12
13 *开始计时
14 count_seconds(Seconds)
15
16 *解析二维码
17 find_data_code_2d(Image, SymbolXLDs, DataCodeHandle, [], [], ResultHandles, DecodedDataStrings)
18
19 *结束计时
20 count_seconds(Seconds1)
21
22 *累计耗时
23 time:=Seconds1-Seconds
24
25
26 *判断解码结果是否有结果
27 tuple_length(DecodedDataStrings, Length)
28 if (Length>0)
29 *//获取区域
30 concat_obj(SymbolXLDs, SymbolXLDs, ObjectsConcat)
31
32 dev_clear_window ()
33 dev_display (Image)
34 *绘制区域
35 dev_display(ObjectsConcat)
36
37 *显示二维码
38 dev_disp_text(DecodedDataStrings, 'window', 'top', 'left', 'black', [], [])
39 endif
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显示效果：
可以看出几十毫秒可以解读条码，如要识别其他类型的二维码，可更改create_data_code_2d_model算子的参数。
那么如何将Halcon代码转化为C#可调用的方法？
1 先将Halcon代码导出，得到cs文件
2 在VS中添加Halcon的引用，并将方法调整，我这里是结合OpencvSHarp
调整后的方法：
1 /// <summary>
2 /// 识别 Data Matrix ECC 200
3 /// </summary>
4 /// <param name="ho_InputImage">图片对象</param>
5 /// <returns></returns>
6 private string ReadDataMatrix(HObject ho_InputImage)
7 {
8 string result = string.Empty;
9 // Local iconic variables
10 HObject ho_SymbolXLDs;
11 HObject ho_ObjectsConcat = null;
12 // Local control variables
13 HTuple hv_DataCodeHandle = new HTuple(), hv_Seconds = new HTuple();
14 HTuple hv_ResultHandles = new HTuple(), hv_DecodedDataStrings = new HTuple();
15 HTuple hv_Seconds1 = new HTuple(), hv_time = new HTuple();
16 HTuple hv_Length = new HTuple();
17 // Initialize local and output iconic variables
18 HOperatorSet.GenEmptyObj(out ho_SymbolXLDs);
19 HOperatorSet.GenEmptyObj(out ho_ObjectsConcat);
20 try
21 {
22
23 //创建模型
24 hv_DataCodeHandle.Dispose();
25 //QR Code
26 HOperatorSet.CreateDataCode2dModel("QR Code", new HTuple(), new HTuple(), out hv_DataCodeHandle);
27 //HOperatorSet.CreateDataCode2dModel("QR Code", new HTuple(), new HTuple(), out hv_DataCodeHandle);
28
29 //设置条码极性
30 HOperatorSet.SetDataCode2dParam(hv_DataCodeHandle, "polarity", "any");
31
32 //解码时长的设置，超时直接将条码丢弃
33 HOperatorSet.SetDataCode2dParam(hv_DataCodeHandle, "timeout", 300);
34
35 //**********开始二维码识别****************
36
37 //开始计时
38 hv_Seconds.Dispose();
39 HOperatorSet.CountSeconds(out hv_Seconds);
40
41 //解析二维码
42 ho_SymbolXLDs.Dispose(); hv_ResultHandles.Dispose(); hv_DecodedDataStrings.Dispose();
43 HOperatorSet.FindDataCode2d(ho_InputImage, out ho_SymbolXLDs, hv_DataCodeHandle,
44 new HTuple(), new HTuple(), out hv_ResultHandles, out hv_DecodedDataStrings);
45
46 //结束计时
47 hv_Seconds1.Dispose();
48 HOperatorSet.CountSeconds(out hv_Seconds1);
49
50 //累计耗时
51 hv_time.Dispose();
52 using (HDevDisposeHelper dh = new HDevDisposeHelper())
53 {
54 hv_time = hv_Seconds1 - hv_Seconds;
55 }
56 //MessageBox.Show(hv_time);
57 //判断解码结果是否有结果
58 hv_Length.Dispose();
59 HOperatorSet.TupleLength(hv_DecodedDataStrings, out hv_Length);
60 if ((int)(new HTuple(hv_Length.TupleGreater(0))) != 0)
61 {
62 result = hv_DecodedDataStrings;
63 }
64 }
65 catch (Exception ex)
66 {
67 return result;
68 }
69 finally
70 {
71 ho_InputImage.Dispose();
72 ho_SymbolXLDs.Dispose();
73 ho_ObjectsConcat.Dispose();
74
75 hv_DataCodeHandle.Dispose();
76 hv_Seconds.Dispose();
77 hv_ResultHandles.Dispose();
78 hv_DecodedDataStrings.Dispose();
79 hv_Seconds1.Dispose();
80 hv_time.Dispose();
81 hv_Length.Dispose();
82 }
83 return result;
84 }
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此处还涉及Mat对象转换为HObject
1 /// <summary>
2 /// Mat转换为HObject
3 /// </summary>
4 /// <param name="mat"></param>
5 /// <returns></returns>
6 public HImage Mat2HObject(Mat mat)
7 {
8 HImage hImage = new HImage();
9 try
10 {
11 if (mat.Type() == MatType.CV_8UC1)
12 {
13 hImage.GenImage1("byte", mat.Width, mat.Height, mat.Data);
14 }
15 else
16 {
17 hImage.GenImageInterleaved(mat.Data, "rgb", mat.Width, mat.Height, 0, "byte", mat.Width, mat.Height, 0, 0, -1, 0);
18 }
19 }
20 catch (Exception)
21 {
22
23
24 }
25 finally
26 {
27 mat.Dispose();
28 }
29 return hImage;
30 }
View Code
标签：条码,hv,Dispose,Halcon,二维,ho,HTuple,DataCodeHandle,new From： https://www.cnblogs.com/arvinzd/p/16851369.html