unit1.~pas

delphi图片处理-获取指定点的RGB值.

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls, jpeg, ExtDlgs, Buttons;

type
  TForm1 = class(TForm)
    Image1: TImage;
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    SpeedButton1: TSpeedButton;
    OpenPictureDialog1: TOpenPictureDialog;
    procedure FormMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure SpeedButton1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormMouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
var
  t:tcolor;
  r:byte;
  g:byte;
  b:byte;
begin
  t:=form1.Canvas.Pixels[x,y];
  r:=getrvalue(t);
  g:=getgvalue(t);
  b:=getbvalue(t);
  Edit1.Text:=inttostr(r);
  Edit2.Text:=inttostr(g);
  Edit3.Text:=inttostr(b);
end;

procedure TForm1.SpeedButton1Click(Sender: TObject);
begin
  if OpenPictureDialog1.Execute then
  begin
    image1.Picture.LoadFromFile(OpenPicturedialog1.FileName);
    Form1.Canvas.Draw(0,0,image1.Picture.Bitmap);
  end;
end;

end.