unit Unit1;

interface

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

type
 TForm1 = class(TForm)
 Image1: TImage;
 Edit1: TEdit;
 Button1: TButton;
 Bevel1: TBevel;
 procedure Button1Click(Sender: TObject);
 private
 { Private declarations }
 public
 { Public declarations }
 end;

var
 Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
var
 Height, Width: integer;
 HH, WW: real;
begin
 Height := 329;
 Width := 329;
 Image1.Picture.LoadFromFile(edit1.Text);
 Image1.AutoSize := true;
 Image1.AutoSize := false;

 HH := Image1.Height / Height;
 WW := Image1.Width / Width;
 if (HH > WW) then
 begin
 Image1.Height := trunc(Image1.Height / HH);
 Image1.Width := trunc(Image1.Width / HH);
 Image1.Stretch := True;
 //ShowMessage('По высоте');
 end
 else
 begin
 Image1.Height := trunc(Image1.Height / WW);
 Image1.Width := trunc(Image1.Width / WW);
 Image1.Stretch := True;
 //ShowMessage('По ширине');
 end;
end;

end.