实例介绍
【实例简介】点开获取图片,选择自带的 素材.png车牌图片,点击识别车牌就识别了
【实例截图】
【核心代码】
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using HalconDotNet; namespace License_plate_recognition { public partial class Form1 : Form { public Form1() { InitializeComponent(); } HObject ho_Image; string Imagetow = ""; private void button1_Click(object sender, EventArgs e) { OpenFileDialog openfile = new OpenFileDialog(); if (openfile.ShowDialog() == DialogResult.OK && openfile.FileName != "") { Imagetow = openfile.FileName; } HOperatorSet.ReadImage(out ho_Image, Imagetow); HTuple hv_Width, hv_Height;//获取长宽 HOperatorSet.GetImageSize(ho_Image, out hv_Width, out hv_Height); HOperatorSet.SetPart(hWindowControl1.HalconWindow, 0, 0, hv_Height - 1, hv_Width - 1);//-1全屏显示 hWindowControl1.HalconWindow.DispObj(ho_Image);//显示图片 } private void button2_Click(object sender, EventArgs e) { //车牌识别 HObject ho_R, ho_G, ho_B, ho_H, ho_S, ho_V, ho_Region, ho_RegionFillUp,ho_Rectangle; HObject ho_RegionAffineTrans, ho_ImageAffineTrans, ho_ImageReduced; HTuple hv_Row, hv_Column, hv_Phi, hv_Length1, hv_Length2, hv_HomMat2D; HOperatorSet.Decompose3(ho_Image, out ho_R, out ho_G, out ho_B); HOperatorSet.TransFromRgb(ho_R, ho_G, ho_B, out ho_H, out ho_S, out ho_V, "hsv"); HOperatorSet.Threshold(ho_S, out ho_Region, 128, 255); //提取threshold HOperatorSet.FillUp(ho_Region, out ho_RegionFillUp); //填充fill_up HOperatorSet.SmallestRectangle2(ho_RegionFillUp, out hv_Row, out hv_Column,out hv_Phi, out hv_Length1, out hv_Length2); //最小外接矩形smallest_rectangle2 HOperatorSet.GenRectangle2(out ho_Rectangle, hv_Row, hv_Column, hv_Phi, hv_Length1, hv_Length2); //生成矩形gen_rectangle2 HOperatorSet.VectorAngleToRigid(hv_Row, hv_Column, hv_Phi, hv_Row, hv_Column, 0, out hv_HomMat2D); HOperatorSet.AffineTransRegion(ho_Rectangle, out ho_RegionAffineTrans, hv_HomMat2D, "nearest_neighbor"); HOperatorSet.AffineTransImage(ho_R, out ho_ImageAffineTrans, hv_HomMat2D, "constant","false"); //图像裁剪 HOperatorSet.ReduceDomain(ho_ImageAffineTrans, ho_RegionAffineTrans, out ho_ImageReduced); HObject ho_Region1, ho_ConnectedRegions, ho_SelectedRegions, ho_SortedRegions; HObject ho_ImageInvert; HTuple hv_Number, hv_OCRHandle, hv_Class, hv_Confidence, hv_FileHandle; //提取白色区域 HOperatorSet.Threshold(ho_ImageReduced, out ho_Region1, 100, 255); HOperatorSet.Connection(ho_Region1, out ho_ConnectedRegions); HOperatorSet.SelectShape(ho_ConnectedRegions, out ho_SelectedRegions, (new HTuple("rect2_len1")).TupleConcat("rect2_len2"), "and", (new HTuple(45)).TupleConcat(20), (new HTuple(55)).TupleConcat(30)); HOperatorSet.CountObj(ho_SelectedRegions, out hv_Number); HOperatorSet.SortRegion(ho_SelectedRegions, out ho_SortedRegions, "first_point","true", "column"); //读取ocr HOperatorSet.ReadOcrClassMlp("Industrial_0-9A-Z_NoRej.omc", out hv_OCRHandle); //图像反转 HOperatorSet.InvertImage(ho_ImageReduced, out ho_ImageInvert); //do_ocr_multi_class_mlp (SortedRegions, ImageInvert, OCRHandle, Class, Confidence) HOperatorSet.DoOcrMultiClassMlp(ho_SortedRegions, ho_ImageInvert, hv_OCRHandle,out hv_Class, out hv_Confidence); //识别do_ocr HOperatorSet.OpenFile("1.txt", "output", out hv_FileHandle); HOperatorSet.FwriteString(hv_FileHandle, hv_Class); HOperatorSet.CloseFile(hv_FileHandle); int i; string hytest = ""; for (i = 0; i < hv_Class.TupleLength(); i ) { hytest=hytest = hv_Class.TupleSelect(i); } textBox1.Text = hytest; HOperatorSet.ReadImage(out ho_Image, Imagetow); HTuple hv_Width, hv_Height;//获取长宽 HOperatorSet.GetImageSize(ho_Image, out hv_Width, out hv_Height); HOperatorSet.SetPart(hWindowControl1.HalconWindow, 0, 0, hv_Height - 1, hv_Width - 1);//-1全屏显示 hWindowControl1.HalconWindow.DispObj(ho_SortedRegions);//显示图片 string hytest1 = ""; for (i = 0; i < hv_Confidence.TupleLength(); i ) { hytest1 = hytest1 = hv_Confidence.TupleSelect(i); } textBox1.Text = hytest1; MessageBox.Show("图像处理完成"); } } }
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