TIF图片转bitmap的两种方式（C#）

缺乏、安全感 2022-11-30 04:02 267阅读 0赞

using System.IO;
    using System.Windows.Media.Imaging;
    using System.Windows;
    using System.Windows.Media;
    using System.Drawing;
    using System.Drawing.Imaging;
    
    namespace ImageUtils
    {
        public static class Converter
        {
            /// <summary>
            /// 将 Bitmap 转化为 BitmapSource
            /// </summary>
            /// <param name="bmp"/>要转换的 Bitmap
            /// <returns>转换后的 BitmapSource</returns>
            public static BitmapSource ToBitmapSource(this System.Drawing.Bitmap bmp)
            {
                System.IntPtr hBitmap = bmp.GetHbitmap();
                try
                {
                    return System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(hBitmap, System.IntPtr.Zero, System.Windows.Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
                }
                finally
                {
                    DeleteObject(hBitmap);
                }
            }
    
            /// <summary>
            /// 将 BitmapSource 转化为 Bitmap
            /// </summary>
            /// <param name="source"/>要转换的 BitmapSource
            /// <returns>转化后的 Bitmap</returns>
            public static System.Drawing.Bitmap ToBitmap(this BitmapSource source)
            {
                using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
                {
                    BitmapEncoder encoder = new BmpBitmapEncoder();
                    encoder.Frames.Add(BitmapFrame.Create(source));
                    encoder.Save(ms);
                    return new System.Drawing.Bitmap(ms);
                }
            }
    
            public static System.Array TifToArray(string tifPath)
            {
                //string tifPath = "test.tif";
                
                // 方式1：
                //Stream imageStreamSource = new FileStream(tifPath, FileMode.Open, FileAccess.Read, FileShare.Read);
                //TiffBitmapDecoder decoder = new TiffBitmapDecoder(imageStreamSource, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
                //BitmapSource bitmapSource = decoder.Frames[0];
                //Bitmap bitmap = ToBitmap(bitmapSource);
    
    
                //方式2：更简洁的方式： tif -> bitmap
                Image tifImage = Image.FromFile(tifPath);
                Bitmap bitmap = new Bitmap(tifImage);
    
                //...
        }
    }