Convertendo de jpeg para bmp

Procedure JPEGtoBMP(const FileName: TFileName);
var
jpeg: TJPEGImage;
bmp: TBitmap;
begin
jpeg := TJPEGImage.Create;
try
jpeg.CompressionQuality := 100; {Default Value}
jpeg.LoadFromFile(FileName);
bmp := TBitmap.Create;
try
bmp.Assign(jpeg);
bmp.SaveTofile(ChangeFileExt(FileName, '.bmp'));
finally
bmp.Free
end;
finally
jpeg.Free
end;
end;