DelphiX 圖像處理：TDIB.DoContrast 對比度調整

效果預覽

功能說明

TDIB.DoContrast(Value: Integer) 調整圖像對比度。參數 Value 可為正值（增強對比）或負值（降低對比），範例使用 100 大幅提高對比度。

完整程式碼

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, DIB, StdCtrls;

type
  TForm1 = class(TForm)
    DXPaintBox1: TDXPaintBox;
    Button1: TButton;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
const
  ImgPath = 'C:\Temp\DX.jpg';
begin
  DXPaintBox1.DIB.LoadFromFile(ImgPath);
  DXPaintBox1.Width := DXPaintBox1.DIB.Width;
  DXPaintBox1.Height := DXPaintBox1.DIB.Height;
  DXPaintBox1.Repaint;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  DXPaintBox1.DIB.DoContrast(100);  // 增強對比度
  DXPaintBox1.Repaint;
end;

end.