How to crop, compress image in jquery, MVC without losing the quality

public JsonResult UploadEventImage(string uploadedFile)

Bitmap bmp= null;

 

                byte[] byteBuffer = Convert.FromBase64String(uploadedFile.Replace("data:image/png;base64,", ""));

                MemoryStream memoryStream = new MemoryStream(byteBuffer);

 

                memoryStream.Position = 0;


                bmp= (Bitmap)Bitmap.FromStream(memoryStream);

                memoryStream.Close();

                memoryStream = null;

                byteBuffer = null;

 

                if (bmp!= null)

                {
                    string fileName = "image1.jpg";

                    fileName = "~/Content/img/" + fileName;
                    bmp.Save(Server.MapPath(fileName), System.Drawing.Imaging.ImageFormat.Bmp);

                    }

}

2)  public JsonResult UploadEventImage(string uploadedFile){ <pre>Bitmap bmp= null;

 

                byte[] byteBuffer = Convert.FromBase64String(uploadedFile.Replace("data:image/png;base64,", ""));

                MemoryStream memoryStream = new MemoryStream(byteBuffer);

 

                memoryStream.Position = 0;

 

                bmp= (Bitmap)Bitmap.FromStream(memoryStream);

 

 

                Image img = bmp;

                Bitmap resizedImg = new Bitmap(img.Width, img.Height);

 

                double ratioX = (double)resizedImg.Width / (double)img.Width;

                double ratioY = (double)resizedImg.Height / (double)img.Height;

                double ratio = ratioX < ratioY ? ratioX : ratioY;

 

                int newHeight = Convert.ToInt32(img.Height * ratio);

                int newWidth = Convert.ToInt32(img.Width * ratio);

 

                using (Graphics g = Graphics.FromImage(resizedImg))

                {

                    g.DrawImage(img, 0, 0, newWidth, newHeight);

                }
 if (bmp!= null)

                {

                    string fileName = "image1.jpg";

                    fileName = "~/Content/img/" + fileName;

                   

                    resizedImg.Save(Server.MapPath(fileName));
}
}