示范简单的图象识别，以腾讯网页附加码为例～～

Question

(*//
标题:简单的图象识别
声明:本贴只作为技术交流
设计:Zswang
日期:2003-09-09http://verify.tencent.com/getimage?0.13927358567975412
这是一个附加码～～先分析下
难点：
1.四个数字加上了一些随机的布点～～
2.背景和字体颜色也随机～～弱点：
1.数字大小一致，字体不会发生改变～～
2.只有两种颜色～～思路：
取得背景色和字体色比较容易，谁的点多就是背景～～
这里是用TBitmap::PixelFormat来处理成单色～～将标准的数字字体保存下来（就１０个），作为比较的元素～～
把两个图象重叠～～
比较重叠前和重叠后是否发生变化～～
这样就可以避免随机布点的干扰～～话不多说，代码为例～～
//*)//RecogniseUnit.pas
unit RecogniseUnit;interfaceuses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls, ImgList, StdCtrls, OleCtrls, SHDocVw;type
  TFormRecognise = class(TForm)
    ImageList1: TImageList;
    ButtonRefresh: TButton;
    WebBrowser1: TWebBrowser;
    EditNumber: TEdit;
    procedure ButtonRefreshClick(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure WebBrowser1DownloadComplete(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;var
  FormRecognise: TFormRecognise;implementation{$R *.dfm}uses Math; //use Math.Min()function SameCanvas(mCanvasA, mCanvasB: TCanvas): Boolean; { 比较两个画布是否相同 }
var
  I, J: Integer;
begin
  Result := False;
  if not Assigned(mCanvasA) then Exit;
  if not Assigned(mCanvasB) then Exit;
  for I := Min(mCanvasA.ClipRect.Left, mCanvasB.ClipRect.Left) to
    Min(mCanvasA.ClipRect.Right, mCanvasB.ClipRect.Right) do
    for J := Min(mCanvasA.ClipRect.Top, mCanvasB.ClipRect.Top) to
      Min(mCanvasA.ClipRect.Bottom, mCanvasB.ClipRect.Bottom) do
      if mCanvasA.Pixels[I, J] <> mCanvasB.Pixels[I, J] then Exit;
  Result := True;
end; { SameCanvas }procedure TFormRecognise.ButtonRefreshClick(Sender: TObject);
begin
  TButton(Sender).Enabled := False;
  WebBrowser1.Refresh;
end;procedure TFormRecognise.FormCreate(Sender: TObject);
begin
  WebBrowser1.Navigate('http://verify.tencent.com/getimage?0.8539209923422657');
end;procedure TFormRecognise.WebBrowser1DownloadComplete(Sender: TObject);
  procedure fNumBitmap(mHandle: THandle; mIndex: Integer; mBitmap: TBitmap);
  var
    vDC: HDC;
  begin
    vDC := GetDC(mHandle);
    try
      mBitmap.Assign(nil);
      mBitmap.Width := 5;
      mBitmap.Height := 8;
      BitBlt(mBitmap.Canvas.Handle, 0, 0, mBitmap.Width, mBitmap.Height, vDC,
        17 + 6 * mIndex, 18, SRCCOPY);
      mBitmap.PixelFormat := pf8bit;
      mBitmap.PixelFormat := pf1bit;
    finally
      DeleteDC(vDC);
    end;
  end;  function fGetNum(mHandle: THandle; mIndex: Integer): Integer;
  var
    I: Integer;
    vBitmapA: TBitmap;
    vBitmapB: TBitmap;
  begin
    Result := -1;
    vBitmapA := TBitmap.Create;
    vBitmapB := TBitmap.Create;
    fNumBitmap(mHandle, mIndex, vBitmapA);
    vBitmapB.Width := vBitmapA.Width;
    vBitmapB.Height := vBitmapA.Height;
    for I := 9 downto 0 do begin //8会覆盖3的基础码，所以反循环
      vBitmapB.Canvas.Draw(0, 0, vBitmapA);
      ImageList1.Draw(vBitmapB.Canvas, 0, 0, I);
      vBitmapB.PixelFormat := pf8bit;
      vBitmapB.PixelFormat := pf1bit;
      if SameCanvas(vBitmapA.Canvas, vBitmapB.Canvas) then begin
        Result := I;
        Exit;
      end;
    end;
    vBitmapA.Free;
    vBitmapB.Free;
  end;
var
  S: string;
  I: Integer;
begin
  Application.ProcessMessages;
  S := '';
  for I := 0 to 3 do S := S + IntToStr(fGetNum(WebBrowser1.Handle, I));
  EditNumber.Text := S;
  ButtonRefresh.Enabled := True;
end;end.

Answer 1

//RecogniseUnit.dfm
object FormRecognise: TFormRecognise
  Left = 369
  Top = 273
  Width = 174
  Height = 88
  Caption = 'FormRecognise'
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'MS Sans Serif'
  Font.Style = []
  OldCreateOrder = False
  OnCreate = FormCreate
  PixelsPerInch = 96
  TextHeight = 13
  object ButtonRefresh: TButton
    Left = 89
    Top = 35
    Width = 75
    Height = 25
    Caption = 'Refresh'
    TabOrder = 0
    OnClick = ButtonRefreshClick
  end
  object WebBrowser1: TWebBrowser
    Left = 0
    Top = 0
    Width = 165
    Height = 34
    TabOrder = 1
    OnDownloadComplete = WebBrowser1DownloadComplete
    ControlData = {
      4C0000000E110000840300000000000000000000000000000000000000000000
      000000004C000000000000000000000001000000E0D057007335CF11AE690800
      2B2E126208000000000000004C0000000114020000000000C000000000000046
      8000000000000000000000000000000000000000000000000000000000000000
      00000000000000000100000000000000000000000000000000000000}
  end
  object EditNumber: TEdit
    Left = 3
    Top = 37
    Width = 86
    Height = 21
    Color = clSilver
    TabOrder = 2
  end
  object ImageList1: TImageList
    Height = 8
    Width = 5
    Left = 127
    Bitmap = {
      494C01010A000E00040005000800FFFFFFFFFF10FFFFFFFFFFFFFFFF424D3600
      0000000000003600000028000000140000002000000001001000000000000005
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      000000000000000000000000FFFFFF0000000000000000000000000000000000
      0000000000000000000000000000000088C00000774000007780000074000000
      8B80000073800000738000008C400000EC637000EB9D7000079DB0006F9DB000
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      76FB900072FDE000ACDCE000DEE3100000000000000000000000000000000000
      000000000000}
  end
end

Answer 2

收藏 hehe^^ 伴水MM好长时间没有见了 哈哈哈

Answer 3

to 伴水BitBlt(mBitmap.Canvas.Handle, 0, 0, mBitmap.Width, mBitmap.Height, vDC,17 + 6 * mIndex, 18, SRCCOPY);这里面的坐标不会是你一点点试的吧？？ :)

Answer 4

我还想问楼主一个问题  ^^! 你最近在做什么方面的开发？还有zdcnow(磁效应) 你收藏的给大家看看？！ :)
看了伴水的这个贴子，我想到了.....汉字的识别 哈哈哈 同理呀 我先做个例子....同志们等会呀

Answer 5

“这里面的坐标不会是你一点点试的吧？？ :)”to CDSoftwareWj:
革命就需要你这样的人，能够把面扩展开，星星之火可以燎原～～
定位就是用附件里的画笔，放大、移动、定位就ok了～～

Answer 6

伴水有问题，大家也帮我试试 hehe^^ 比较菜想不通怎么比的不对看看我的程序//Unit1.pas
unit Unit1;interfaceuses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls, StdCtrls, jpeg, ImgList;type
  TCrackPanel = class(TPanel);  TForm1 = class(TForm)
    Button1: TButton;
    Edit1: TEdit;
    Panel1: TPanel;
    Panel2: TPanel;
    Button2: TButton;
    Edit2: TEdit;
    ImageList1: TImageList;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;var
  Form1: TForm1;implementation{$R *.dfm}uses Math; //use Math.Min()procedure TForm1.Button1Click(Sender: TObject);
var
  Bmp: TBitmap;
  i: Integer;
begin
  Bmp := TBitmap.Create;
  Bmp.Width := Width;
  Bmp.Height := Form1.Height;
  Bmp.Canvas.Brush.Color := clBtnFace;
  SetBKMode(Bmp.Canvas.Handle, TRANSPARENT);
  Bmp.Canvas.TextOut(0, 0, Edit1.Text);
  for i := 0 to Bmp.Width - 1 do
    TCrackPanel(Panel1).Canvas.CopyRect(Rect(0,0,i,Bmp.Height),Bmp.Canvas,Rect(0,0,i,Bmp.Height));
  Bmp.Free;
end;function SameCanvas(mCanvasA, mCanvasB: TCanvas): Boolean; { 比较两个画布是否相同 }
var
  I, J: Integer;
begin
  Result := False;
  if not Assigned(mCanvasA) then Exit;
  if not Assigned(mCanvasB) then Exit;
  for I := Min(mCanvasA.ClipRect.Left, mCanvasB.ClipRect.Left) to
    Min(mCanvasA.ClipRect.Right, mCanvasB.ClipRect.Right) do
    for J := Min(mCanvasA.ClipRect.Top, mCanvasB.ClipRect.Top) to
      Min(mCanvasA.ClipRect.Bottom, mCanvasB.ClipRect.Bottom) do
      if mCanvasA.Pixels[I, J] <> mCanvasB.Pixels[I, J] then Exit;
  Result := True;
end; { SameCanvas }procedure TForm1.Button2Click(Sender: TObject);
var
  vBitmapA: TBitmap;
begin
  vBitmapA := TBitmap.Create;
  vBitmapA.Width := 16;
  vBitmapA.Height := 16;
  ImageList1.GetBitmap(0, vBitmapA);
  vBitmapA.PixelFormat := pf8bit;
  vBitmapA.PixelFormat := pf1bit;
  if SameCanvas(vBitmapA.Canvas, TCrackPanel(Panel1).Canvas) then
    Edit2.Text := '你输入的是个"王"字我没有错吧 哇哈哈哈哈'
  else
    Edit2.Text := '你输入的这是个什么呀 ^^!';
  vBitmapA.Free;
end;end.

Answer 7

//Form1.dfm
object Form1: TForm1
  Left = 192
  Top = 107
  Width = 419
  Height = 161
  Caption = 'Form1'
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'MS Sans Serif'
  Font.Style = []
  OldCreateOrder = False
  PixelsPerInch = 96
  TextHeight = 13
  object Button1: TButton
    Left = 40
    Top = 92
    Width = 75
    Height = 25
    Caption = '生成图像'
    TabOrder = 0
    OnClick = Button1Click
  end
  object Edit1: TEdit
    Left = 16
    Top = 56
    Width = 121
    Height = 21
    TabOrder = 1
  end
  object Panel1: TPanel
    Left = 60
    Top = 24
    Width = 16
    Height = 16
    TabOrder = 2
  end
  object Panel2: TPanel
    Left = 288
    Top = 20
    Width = 16
    Height = 16
    TabOrder = 3
  end
  object Button2: TButton
    Left = 268
    Top = 92
    Width = 75
    Height = 25
    Caption = '识别'
    TabOrder = 4
    OnClick = Button2Click
  end
  object Edit2: TEdit
    Left = 204
    Top = 56
    Width = 189
    Height = 21
    TabOrder = 5
  end
  object ImageList1: TImageList
    Left = 364
    Top = 16
    Bitmap = {
      494C010101000400040010001000FFFFFFFFFF10FFFFFFFFFFFFFFFF424D3600
      0000000000003600000028000000400000001000000001001000000000000008
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      FDFF000000000000FDFF000000000000C01F000000000000FDFF000000000000
      FDFF000000000000FDFF000000000000C01F000000000000FFBF000000000000
      FFFF000000000000FFFF00000000000000000000000000000000000000000000
      000000000000}
  end
end

Answer 8

//基础码有些偏移，也可以不用ImageList直接TextOut输出到画布～～  ImageList1.GetBitmap(0, vBitmapA);
//  vBitmapA.PixelFormat := pf8bit;
//  vBitmapA.PixelFormat := pf1bit; //这两条没用了object ImageList1: TImageList
  Left = 364
  Top = 16
  Bitmap = {
    494C010101000400040010001000FFFFFFFFFF00FFFFFFFFFFFFFFFF424D3600
    0000000000003600000028000000400000001000000001001000000000000008
    0000000000000000000000000000000000000000000000000000000000000000
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    000000000000000000000000000000000000424D3E000000000000003E000000
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    FFFF000000000000FFFF000000000000001F000000000000FBFF000000000000
    FBFF000000000000FBFF000000000000FBFF000000000000803F000000000000
    FBFF000000000000FBFF000000000000FBFF000000000000803F000000000000
    FF7F000000000000FFFF000000000000}
end

Answer 9

程序我以经调过去了1. 像你说的那点//  vBitmapA.PixelFormat := pf8bit;
//  vBitmapA.PixelFormat := pf1bit; //这两条没用了2. 
  //Bmp.Canvas.TextOut(0, 0, Edit1.Text); // 以前的
  Bmp.Canvas.TextOut(1, 1, Edit1.Text);  //改成这样就可以了 ^^!就差这么两点程序就过去了

Answer 10

//基础码有些偏移不过好多地方都不可能这么合适的，有什么好的办法呢？还有就是要做真正的汉字识别或车牌识别，怎样去“搜索”基础码呢？？总不会一个个挨着找吧 hehe^^

Answer 11

//基础码有些偏移不过好多地方都不可能这么合适的，有什么好的办法呢？还有就是要做真正的汉字识别或车牌识别，怎样去“搜索”基础码呢？？总不会一个个挨着找吧 hehe^^

Answer 12

哎，伴水，能不能借着你的这个帖子，结我（我们^^）讲讲有关车牌识别的知识点公式是不是很复杂？我以前在搞一个北京交管项目时对这种识别很感兴趣只要车辆一过就能把车牌内容识别出来，只不过处理（反应）速度还不太好讲讲思路也行呀  ^^!  大不了再开帖子给你3分 HoHo~~~

Answer 13

就是就是，
老大很久没有出手了，
hehe

Answer 14

步骤
Step.1 图像预处理
  对动态采集到的图像进行滤波、边界增强等处理，以克服图像干扰，改善识别效果。 
Step.2 车牌的定位
  在动态采集到的图像中，自动找到车牌的位置。 
Step.3 字符分割
  在车牌图像上，自动提取单个字符的图像。 
Step.4 字符识别
  在每个字符图像中识别出字符文字。 这是汉王眼的介绍～～
http://www.hw99.com/product/prodview.asp?proid=090102to CDSoftwareWj: 
车牌识别你是做过D～～
我是没有做过D～～
拿我开涮呀？～～

Answer 15

我只是看过D~~~~做法只是想想D~~~~做是做不出来D~~~~没有拿你开涮啊 哈哈哈 ^^!

Answer 16

zswang(伴水清清)(专家门诊清洁工) 另开一贴好不好，太长了！