Image 배율만큼 확대

/// <summary>
        /// 확대 퍼센트 변수
        ///  기본 값 500%
        /// </summary>
        double dZoomPercent = 500;

 

_img = bmp as Image;

 

Bitmap ConvertImg = new Bitmap(_img, (int)(_img.Size.Width*dZoomPercent/100), (int)(_img.Size.Height*dZoomPercent/100));

 

_form.BackgroundImage = ConvertImg;