在我的Tiff文件上应用CCITT压缩后，它会生成一个带有纯黑色背景的图像

使用LZW压缩创建tiff文件（默认）： –

System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(800, 1000); Graphics g = Graphics.FromImage(bitmap); g.DrawString("Name: " + Name.Text, outputFont, Brushes.Black, new PointF(0, 20)); g.DrawString("Date Of Birth: " + Date_Of_Birth.Text, outputFont, Brushes.Black, new PointF(0, 40)); g.DrawString("Address: " + Address.Text, outputFont, Brushes.Black, new PointF(0, 60)); g.DrawString("City: " + City.Text, outputFont, Brushes.Black, new PointF(0, 80)); g.DrawString("State: " + State.Text, outputFont, Brushes.Black, new PointF(0, 100)); g.DrawString("Zip Code: " + Zip_Code.Text, outputFont, Brushes.Black, new PointF(0, 120)); g.DrawString("Phone: " + Phone.Text, outputFont, Brushes.Black, new PointF(0, 140)); g.DrawString(" ID: " + ID.Text, outputFont, Brushes.Black, new PointF(0, 160)); fileName = saveDirectory + id + ".tif"; bitmap.Save(fileName, ImageFormat.Tiff); 

所以我试图将其压缩改为CCITT： –

 Bitmap myBitmap; myBitmap = new Bitmap(fileName); ImageCodecInfo myImageCodecInfo; myImageCodecInfo = GetEncoderInfo("image/tiff"); System.Drawing.Imaging.Encoder myEncoder; myEncoder = System.Drawing.Imaging.Encoder.Compression; EncoderParameters myEncoderParameters; myEncoderParameters = new EncoderParameters(1); EncoderParameter myEncoderParameter; myEncoderParameter = new EncoderParameter(myEncoder,(long)EncoderValue.CompressionCCITT4); myEncoderParameters.Param[0] = myEncoderParameter; myBitmap.Save(new_fileName, myImageCodecInfo, myEncoderParameters); private static ImageCodecInfo GetEncoderInfo(String mimeType) { int j; ImageCodecInfo[] encoders; encoders = ImageCodecInfo.GetImageEncoders(); for (j = 0; j < encoders.Length; ++j) { if (encoders[j].MimeType == mimeType) return encoders[j]; } return null; } 

该过程有效，我可以看到我的tiff文件的压缩类型已正确修改为CCITT（通过右键单击输出文件并检查属性）。 然而，当我试图打开它时，整个图像都是黑色的……没有任何东西在它上面。

当我将压缩类型更改为LZW或None或RLE时，tiff文件再次成为可查看的图像。

不幸的是我只需要CCITT格式。 任何人都可以帮我解决这个问题吗？

更新：

即使该方法现在可以在我的Windows 7 32位操作系统上使用Visual Studio 2010工作。一旦发布到Windows 2008服务器，该解决方案不起作用（仅适用于CCITT压缩技术）。 以下链接解释了原因。

http://social.msdn.microsoft.com/Forums/vstudio/en-US/1585c562-f7a9-4cfd-9674-6855ffaa8653/parameter-is-not-valid-for-compressionccitt4-on-windows-server-2003-和2008？论坛= netfxbcl

根据这篇文章，这是我正在尝试但无法将压缩应用于原始图像： –

  int width = 800; int height = 1000; int stride = width/8; byte[] pixels = new byte[height*stride]; // Try creating a new image with a custom palette. List colors = new List(); colors.Add(System.Windows.Media.Colors.Red); colors.Add(System.Windows.Media.Colors.Blue); colors.Add(System.Windows.Media.Colors.Green); BitmapPalette myPalette = new BitmapPalette(colors); // Creates a new empty image with the pre-defined palette BitmapSource image = BitmapSource.Create( width, height, 96, 96, System.Windows.Media.PixelFormats.BlackWhite, myPalette, pixels, stride); FileStream stream = new FileStream(Original_File, FileMode.Create); TiffBitmapEncoder encoder = new TiffBitmapEncoder(); encoder.Compression = TiffCompressOption.Ccitt4; encoder.Frames.Add(BitmapFrame.Create(image)); encoder.Save(stream); 

但是，我的最终结果是具有正确压缩的文件，但是背景为纯黑色。 Deja Vu。

Answer 1

编辑您的代码，您将能够使用所需的压缩而无需填充黑色背景：

 System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(800, 1000); Graphics g = Graphics.FromImage(bitmap); /* Add this */ g.FillRectangle(Brushes.White, new Rectangle(0,0, 800, 1000)); g.DrawString("Name: " + Name.Text, outputFont, Brushes.Black, new PointF(0, 20)); g.DrawString("Date Of Birth: " + Date_Of_Birth.Text, outputFont, Brushes.Black, new PointF(0, 40)); g.DrawString("Address: " + Address.Text, outputFont, Brushes.Black, new PointF(0, 60)); g.DrawString("City: " + City.Text, outputFont, Brushes.Black, new PointF(0, 80)); g.DrawString("State: " + State.Text, outputFont, Brushes.Black, new PointF(0, 100)); g.DrawString("Zip Code: " + Zip_Code.Text, outputFont, Brushes.Black, new PointF(0, 120)); g.DrawString("Phone: " + Phone.Text, outputFont, Brushes.Black, new PointF(0, 140)); g.DrawString(" ID: " + ID.Text, outputFont, Brushes.Black, new PointF(0, 160)); fileName = saveDirectory + id + ".tif"; bitmap.Save(fileName, ImageFormat.Tiff);