C# 车牌识别示例源码

C#语言基础
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开发语言：C#
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发布时间：2018-06-10
实例类别：C#语言基础
发布人：jhuang
文件格式：.rar
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实例介绍

【实例简介】
【实例截图】
【核心代码】
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Drawing.Imaging;
using System.Security.Cryptography;
 
//using System.Windows.Forms.SaveFileDialog;
 
namespace sample
{
    /// <summary>
    /// Form1 的摘要说明。
    /// </summary>
    public class ImageProcess : System.Windows.Forms.Form
    {
        private System.Windows.Forms.Button OpenButton;
        private System.Windows.Forms.Button GrayButton;
        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.Container components = null;
        private System.Windows.Forms.Button SaveButton;
        private System.Windows.Forms.Panel panel2;
 
        private Bitmap m_Bitmap ;//整幅图像
        private Bitmap m_Bitmap1;
        private Bitmap m_Bitmap2;
        private Bitmap m_Bitmap3;
        private Bitmap c_Bitmap ;//车牌图像
        private int maxX;
        private int maxY;
        Pen pen1=new Pen(Color.Black);
        private System.Windows.Forms.Panel panel1;
        private System.Windows.Forms.Button InvertButton;
        private System.Windows.Forms.Button BrightButton;
        private System.Windows.Forms.Panel panel4;
        private System.Windows.Forms.GroupBox groupBox1;
        private System.Windows.Forms.GroupBox groupBox2;
        private System.Windows.Forms.GroupBox groupBox3;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Panel GraphyPanel;
        private System.Windows.Forms.Panel LcolorPanel;
        private System.Windows.Forms.GroupBox groupBox4; 
 
        private String name;
        private bool aline=false;
        int [] gray=new int[256];
        int [] rr = new int[256];
        int [] gg = new int[256];
        int [] bb = new int[256];
        private float count ;
         
        private float [] gl=new float[256];
        int flag=0;
        private System.Windows.Forms.Button NoiselessButton;
        private System.Windows.Forms.Button MarginalButton;
        private System.Windows.Forms.Button TwoValueButton;
        int xx=-1;
 
        public ImageProcess()
        {
            //
            // Windows 窗体设计器支持所必需的
            //
            m_Bitmap = new Bitmap(2,2);
            m_Bitmap1 = new Bitmap(2,2);
                        m_Bitmap2 = new Bitmap(2,2);
                        m_Bitmap3 = new Bitmap(2,2);
            c_Bitmap = new Bitmap(2,2);
            InitializeComponent();
             
 
            //
            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
            //
        }
 
        /// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }
 
        #region Windows 窗体设计器生成的代码
        /// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(ImageProcess));
            this.OpenButton = new System.Windows.Forms.Button();
            this.GrayButton = new System.Windows.Forms.Button();
            this.SaveButton = new System.Windows.Forms.Button();
            this.panel2 = new System.Windows.Forms.Panel();
            this.panel1 = new System.Windows.Forms.Panel();
            this.GraphyPanel = new System.Windows.Forms.Panel();
            this.InvertButton = new System.Windows.Forms.Button();
            this.BrightButton = new System.Windows.Forms.Button();
            this.panel4 = new System.Windows.Forms.Panel();
            this.groupBox1 = new System.Windows.Forms.GroupBox();
            this.groupBox2 = new System.Windows.Forms.GroupBox();
            this.LcolorPanel = new System.Windows.Forms.Panel();
            this.groupBox3 = new System.Windows.Forms.GroupBox();
            this.label1 = new System.Windows.Forms.Label();
            this.groupBox4 = new System.Windows.Forms.GroupBox();
            this.TwoValueButton = new System.Windows.Forms.Button();
            this.MarginalButton = new System.Windows.Forms.Button();
            this.NoiselessButton = new System.Windows.Forms.Button();
            this.groupBox1.SuspendLayout();
            this.groupBox2.SuspendLayout();
            this.groupBox4.SuspendLayout();
            this.SuspendLayout();
            // 
            // OpenButton
            // 
            this.OpenButton.Location = new System.Drawing.Point(8, 24);
            this.OpenButton.Name = "OpenButton";
            this.OpenButton.Size = new System.Drawing.Size(75, 23);
            this.OpenButton.TabIndex = 1;
            this.OpenButton.Text = "Open";
            this.OpenButton.Click  = new System.EventHandler(this.Open_Click);
            // 
            // GrayButton
            // 
            this.GrayButton.Enabled = false;
            this.GrayButton.Location = new System.Drawing.Point(8, 120);
            this.GrayButton.Name = "GrayButton";
            this.GrayButton.Size = new System.Drawing.Size(75, 23);
            this.GrayButton.TabIndex = 2;
            this.GrayButton.Text = "Gray";
            this.GrayButton.Click  = new System.EventHandler(this.GrayButton_Click);
            // 
            // SaveButton
            // 
            this.SaveButton.Enabled = false;
            this.SaveButton.Location = new System.Drawing.Point(8, 248);
            this.SaveButton.Name = "SaveButton";
            this.SaveButton.Size = new System.Drawing.Size(75, 23);
            this.SaveButton.TabIndex = 5;
            this.SaveButton.Text = "Save";
            this.SaveButton.Click  = new System.EventHandler(this.SaveButton_Click);
            // 
            // panel2
            // 
            this.panel2.Location = new System.Drawing.Point(78, 6);
            this.panel2.Name = "panel2";
            this.panel2.Size = new System.Drawing.Size(472, 16);
            this.panel2.TabIndex = 6;
            this.panel2.Paint  = new System.Windows.Forms.PaintEventHandler(this.panel2_Paint);
            // 
            // panel1
            // 
            this.panel1.AutoScroll = true;
            this.panel1.BackColor = System.Drawing.SystemColors.ControlLight;
            this.panel1.Location = new System.Drawing.Point(12, 42);
            this.panel1.Name = "panel1";
            this.panel1.Size = new System.Drawing.Size(324, 264);
            this.panel1.TabIndex = 4;
            this.panel1.Paint  = new System.Windows.Forms.PaintEventHandler(this.panel1_Paint);
            // 
            // GraphyPanel
            // 
            this.GraphyPanel.BackColor = System.Drawing.SystemColors.ControlLight;
            this.GraphyPanel.ForeColor = System.Drawing.Color.Coral;
            this.GraphyPanel.Location = new System.Drawing.Point(360, 156);
            this.GraphyPanel.Name = "GraphyPanel";
            this.GraphyPanel.Size = new System.Drawing.Size(210, 120);
            this.GraphyPanel.TabIndex = 7;
            this.GraphyPanel.Paint  = new System.Windows.Forms.PaintEventHandler(this.GraphyPanel_Paint);
            // 
            // InvertButton
            // 
            this.InvertButton.Enabled = false;
            this.InvertButton.Location = new System.Drawing.Point(8, 56);
            this.InvertButton.Name = "InvertButton";
            this.InvertButton.Size = new System.Drawing.Size(75, 23);
            this.InvertButton.TabIndex = 10;
            this.InvertButton.Text = "Invert";
            this.InvertButton.Click  = new System.EventHandler(this.InvertButton_Click);
            // 
            // BrightButton
            // 
            this.BrightButton.Enabled = false;
            this.BrightButton.Location = new System.Drawing.Point(8, 88);
            this.BrightButton.Name = "BrightButton";
            this.BrightButton.Size = new System.Drawing.Size(75, 23);
            this.BrightButton.TabIndex = 11;
            this.BrightButton.Text = "Equalize";
            this.BrightButton.Click  = new System.EventHandler(this.BrightButton_Click);
            // 
            // panel4
            // 
            this.panel4.BackColor = System.Drawing.SystemColors.ControlLight;
            this.panel4.Location = new System.Drawing.Point(8, 16);
            this.panel4.Name = "panel4";
            this.panel4.Size = new System.Drawing.Size(194, 62);
            this.panel4.TabIndex = 13;
            this.panel4.Paint  = new System.Windows.Forms.PaintEventHandler(this.panel4_Paint);
            // 
            // groupBox1
            // 
            this.groupBox1.Controls.Add(this.panel4);
            this.groupBox1.Location = new System.Drawing.Point(354, 42);
            this.groupBox1.Name = "groupBox1";
            this.groupBox1.Size = new System.Drawing.Size(216, 80);
            this.groupBox1.TabIndex = 0;
            this.groupBox1.TabStop = false;
            this.groupBox1.Text = "车牌";
            this.groupBox1.Enter  = new System.EventHandler(this.groupBox1_Enter);
            // 
            // groupBox2
            // 
            this.groupBox2.Controls.Add(this.LcolorPanel);
            this.groupBox2.Location = new System.Drawing.Point(354, 132);
            this.groupBox2.Name = "groupBox2";
            this.groupBox2.Size = new System.Drawing.Size(222, 174);
            this.groupBox2.TabIndex = 15;
            this.groupBox2.TabStop = false;
            this.groupBox2.Text = "直方图";
            this.groupBox2.Enter  = new System.EventHandler(this.groupBox2_Enter);
            // 
            // LcolorPanel
            // 
            this.LcolorPanel.Location = new System.Drawing.Point(8, 152);
            this.LcolorPanel.Name = "LcolorPanel";
            this.LcolorPanel.Size = new System.Drawing.Size(208, 18);
            this.LcolorPanel.TabIndex = 0;
            this.LcolorPanel.Paint  = new System.Windows.Forms.PaintEventHandler(this.LcolorPanel_Paint);
            // 
            // groupBox3
            // 
            this.groupBox3.Location = new System.Drawing.Point(6, 24);
            this.groupBox3.Name = "groupBox3";
            this.groupBox3.Size = new System.Drawing.Size(336, 288);
            this.groupBox3.TabIndex = 16;
            this.groupBox3.TabStop = false;
            this.groupBox3.Text = "待处理图像";
            // 
            // label1
            // 
            this.label1.Location = new System.Drawing.Point(6, 6);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(72, 16);
            this.label1.TabIndex = 17;
            this.label1.Text = "文件路径";
            this.label1.Click  = new System.EventHandler(this.label1_Click_2);
            // 
            // groupBox4
            // 
            this.groupBox4.Controls.Add(this.TwoValueButton);
            this.groupBox4.Controls.Add(this.MarginalButton);
            this.groupBox4.Controls.Add(this.SaveButton);
            this.groupBox4.Controls.Add(this.InvertButton);
            this.groupBox4.Controls.Add(this.OpenButton);
            this.groupBox4.Controls.Add(this.NoiselessButton);
            this.groupBox4.Controls.Add(this.GrayButton);
            this.groupBox4.Controls.Add(this.BrightButton);
            this.groupBox4.Location = new System.Drawing.Point(582, 6);
            this.groupBox4.Name = "groupBox4";
            this.groupBox4.Size = new System.Drawing.Size(88, 300);
            this.groupBox4.TabIndex = 18;
            this.groupBox4.TabStop = false;
            // 
            // TwoValueButton
            // 
            this.TwoValueButton.Enabled = false;
            this.TwoValueButton.Location = new System.Drawing.Point(8, 216);
            this.TwoValueButton.Name = "TwoValueButton";
            this.TwoValueButton.Size = new System.Drawing.Size(75, 23);
            this.TwoValueButton.TabIndex = 14;
            this.TwoValueButton.Text = "2Value";
            this.TwoValueButton.Click  = new System.EventHandler(this.InciseButton_Click);
            // 
            // MarginalButton
            // 
            this.MarginalButton.Enabled = false;
            this.MarginalButton.Location = new System.Drawing.Point(8, 184);
            this.MarginalButton.Name = "MarginalButton";
            this.MarginalButton.Size = new System.Drawing.Size(75, 23);
            this.MarginalButton.TabIndex = 13;
            this.MarginalButton.Text = "Marginal";
            this.MarginalButton.Click  = new System.EventHandler(this.MarginalButton_Click_1);
            // 
            // NoiselessButton
            // 
            this.NoiselessButton.Enabled = false;
            this.NoiselessButton.Location = new System.Drawing.Point(8, 152);
            this.NoiselessButton.Name = "NoiselessButton";
            this.NoiselessButton.Size = new System.Drawing.Size(75, 23);
            this.NoiselessButton.TabIndex = 12;
            this.NoiselessButton.Text = "Noiseless";
            this.NoiselessButton.Click  = new System.EventHandler(this.NoiselessButton_Click);
            // 
            // ImageProcess
            // 
            this.ClientSize = new System.Drawing.Size(676, 320);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.GraphyPanel);
            this.Controls.Add(this.panel1);
            this.Controls.Add(this.panel2);
            this.Controls.Add(this.groupBox1);
            this.Controls.Add(this.groupBox2);
            this.Controls.Add(this.groupBox3);
            this.Controls.Add(this.groupBox4);
            this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
            this.MaximizeBox = false;
            this.Name = "ImageProcess";
            this.Text = "数字图像处理实验－－陈家伟 200345005006";
            this.Load  = new System.EventHandler(this.ImageProcess_Load);
            this.groupBox1.ResumeLayout(false);
            this.groupBox2.ResumeLayout(false);
            this.groupBox4.ResumeLayout(false);
            this.ResumeLayout(false);
 
        }
        #endregion
 
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new ImageProcess());
        }
 
        private void label1_Click(object sender, System.EventArgs e)
        {
             
        }
 
        private void Open_Click(object sender, System.EventArgs e)
        {
             
            BrightButton.Enabled=false;
            NoiselessButton.Enabled=false;
            MarginalButton.Enabled=false;
            TwoValueButton.Enabled=false;
            SaveButton.Enabled=false;
            panel4.Enabled=false;       
 
 
            OpenFileDialog openFileDialog = new OpenFileDialog(); 
 
            openFileDialog.Filter = "Jpeg文件(*.jpg)|*.jpg|Bitmap文件(*.bmp)|*.bmp| 所有合适文件(*.bmp/*.jpg)|*.bmp/*.jpg";   
 
            openFileDialog.FilterIndex = 2 ; 
 
            openFileDialog.RestoreDirectory = true ; 
 
            if(DialogResult.OK == openFileDialog.ShowDialog()) 
 
            { 
                name = openFileDialog.FileName;
                m_Bitmap = (Bitmap)Bitmap.FromFile(name, false); 
 
                this.panel1.AutoScroll = true; 
 
                this.panel1.AutoScrollMinSize=new Size ((int)(m_Bitmap.Width),(int) 
 
                    m_Bitmap.Height); 
 
                this.InvertButton.Enabled=true;
                this.GrayButton.Enabled=true;
                 
 
                panel1.Invalidate(); 
                panel2.Invalidate();
                panel4.Invalidate();
 
            } 
 
        }
 
        private void ImageProcess_Load(object sender, System.EventArgs e)
        {
             
        }
 
        private void hScrollBar1_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e)
        {
            panel1.Invalidate();
        }
 
        private void panel1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
        {
            Graphics g = e.Graphics; 
            g.DrawImage(m_Bitmap, new Rectangle(this.panel1.AutoScrollPosition.X, this.panel1.AutoScrollPosition.Y, 
                (int)(m_Bitmap.Width), (int)(m_Bitmap.Height)));
 
        }
 
        private void SaveButton_Click(object sender, System.EventArgs e)
        {
            SaveFileDialog saveFileDialog = new SaveFileDialog();
            saveFileDialog.Filter = "Bitmap文件(*.bmp)|*.bmp| Jpeg文件(*.jpg)|*.jpg| 所有合适文件(*.bmp/*.jpg)|*.bmp/*.jpg";
            saveFileDialog.FilterIndex = 1 ; 
 
            saveFileDialog.RestoreDirectory = true ; 
 
            if(DialogResult.OK == saveFileDialog.ShowDialog()) 
 
            { 
                c_Bitmap.Save(saveFileDialog.FileName); 
 
            } 
 
        }
 
        private void panel2_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
        {
            Graphics g = e.Graphics; 
            g.DrawString(name,new Font("Arial", 8), new SolidBrush(Color.Black),0,0);
        }
 
        private void label1_Click_1(object sender, System.EventArgs e)
        {
         
        }
 
        private void InvertButton_Click(object sender, System.EventArgs e)
        {
            if(Filters.Invert(m_Bitmap,out gray)) 
            {
                LcolorPanel.Invalidate();
                graydo();
            }
 
        }
 
 
        private void GraphyPanel_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            int p;
            p = m_Bitmap.Width*m_Bitmap.Height;
        //  this.l_pixel.Text=p.ToString();
 
            int height =this.GraphyPanel.Height;
            for(int j=0;j<256;j  )
            {
                if(gl[j]>height)
                    gl[j]=height;
                g.DrawLine(pen1,j,height,j,height-gl[j]);
            }
            if(aline)
            {
                g.DrawLine(Pens.OrangeRed,xx,0,xx,height);   
            }
        }
 
        private void GraphyPanel_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            xx=e.X; 
            if(xx>255)
                xx=255;
            if(xx<=0)
                xx=0;
    
            aline=true;
            this.GraphyPanel.Invalidate();
        }
 
        private void GraphyPanel_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            Point p=new Point(e.X,e.Y);
            if(new Rectangle(0,0,256,127).Contains(p))
            {
                this.xx=e.X;
            }
            else
            {
                this.xx=-1;
            }
    
            this.GraphyPanel.Invalidate();
        }
 
        private void GraphyPanel_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            aline=false;
        }
 
        private void LcolorPanel_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
        {
            int width=this.LcolorPanel.Width;
            int height=this.LcolorPanel.Height;
            int j;
            Color c;
            Graphics g=e.Graphics;
 
            switch(flag)
            {
                case 1:
                {
                    for(int i=width;i>=0;i--)
                    {
                        j=i;
                        if(j>255) j=255;
                        c=Color.FromArgb(j,j,j);
                        Pen pen2=new Pen(c,1);   
                        g.DrawLine(pen2,i,0,i,height);
                    }
                    break;
                }
                case 2:
                {
                    for(int i=width;i>=0;i--)
                    {
                        j=i;
                        if(j>255) j=255;
                        c=Color.FromArgb(j,0,0);
                        Pen pen2=new Pen(c,1);   
                        g.DrawLine(pen2,i,0,i,height);
                    }
                    break;
                }
                case 3:
                {
                    for(int i=width;i>=0;i--)
                    {
                        j=i;
                        if(j>255) j=255;
                        c=Color.FromArgb(0,j,0);
                        Pen pen2=new Pen(c,1);   
                        g.DrawLine(pen2,i,0,i,height);
                    }
                    break;
                }
                case 4:
                {
                    for(int i=width;i>=0;i--)
                    {
                        j=i;
                        if(j>255) j=255;
                        c=Color.FromArgb(0,0,j);
                        Pen pen2=new Pen(c,1);   
                        g.DrawLine(pen2,i,0,i,height);
                    }
                    break;
                }
                default:
                    break;
 
            }
        }
 
        private void GrayButton_Click(object sender, System.EventArgs e)
        {
            Filters.zft(m_Bitmap,out gray,out rr,out gg, out bb); 
            this.BrightButton.Enabled=true;
            this.NoiselessButton.Enabled=true;
            LcolorPanel.Invalidate();
            graydo();
         
        }
 
        private void BrightButton_Click(object sender, System.EventArgs e)
        {
         
            if(Filters.Brightness(m_Bitmap,gray,out gray,(int)count) )
                graydo();
 
        }
 
        private void label2_Click(object sender, System.EventArgs e)
        {
         
        }
 
        private void panel4_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
        {
            Graphics g = e.Graphics; 
            Point ulCorner = new Point( 0, 0);
            g.DrawImage(c_Bitmap,0,0);
            //g.DrawImage(c_Bitmap, new Rectangle(this.panel1.AutoScrollPosition.X, this.panel1.AutoScrollPosition.Y, 
            //  (int)(c_Bitmap.Width), (int)(c_Bitmap.Height)));
        }
 
        private void groupBox1_Enter(object sender, System.EventArgs e)
        {
         
        }
 
        private void label1_Click_2(object sender, System.EventArgs e)
        {
         
        }
 
        private void groupBox2_Enter(object sender, System.EventArgs e)
        {
         
        }
        private void graydo()
        {
            this.flag=1;
            count = m_Bitmap.Width * m_Bitmap.Height;
            gl=new float[256];
            for(int i=0;i<256; i  )
                gl[i]= gray[i]/count *1500;
            pen1=Pens.Red;
            panel1.Invalidate();
            GraphyPanel.Invalidate();
        }
 
        private void NoiselessButton_Click(object sender, System.EventArgs e)
        {
            if(Filters.GaussianFilter(m_Bitmap,out gray))
                graydo();
            this.MarginalButton.Enabled=true;
        }
 
        private void MarginalButton_Click_1(object sender, System.EventArgs e)
        {
            int ccount;
            int yl,yr,xu,xd;
            if (Filters.MarginalFilter(m_Bitmap,out gray,out ccount ,67,out xu,out xd,out yl,out yr,out maxX,out maxY)) {
             
                m_Bitmap1 = (Bitmap)Bitmap.FromFile(name, false); 
                Rectangle sourceRectangle = new Rectangle(yl,xu,yr-yl,xd-xu);
                c_Bitmap= m_Bitmap1.Clone(sourceRectangle,
                    PixelFormat.DontCare);
                groupBox1.Text="车牌";
                groupBox1.Invalidate();
                 
                this.SaveButton.Enabled=true;
                this.TwoValueButton.Enabled=true;
                panel4.Invalidate();
                graydo();
            }
        }
 
 
        private void textBox1_TextChanged(object sender, System.EventArgs e)
        {
         
        }
 
        private void InciseButton_Click(object sender, System.EventArgs e)
        {
             
            Filters.zft(c_Bitmap,out gray,out rr,out gg, out bb); 
            Rectangle sourceRectangle = new Rectangle(maxY,maxX,66,14);
            Bitmap xc_Bitmap=c_Bitmap.Clone(sourceRectangle,
                PixelFormat.DontCare);
            if (Filters.TowValue(c_Bitmap,xc_Bitmap,maxY,maxY)) {
                groupBox1.Text="车牌（经二值化处理）";
                groupBox1.Invalidate();
                panel4.Invalidate();
            }
        }
 
    }
}
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第 1 楼 wujianwei123 发表于: 2019-05-28 20:00 11: 老哥，这个不能实现图像提取出来应该有的字母吗
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