从您对字节操作部分的描述来看,您似乎正在正确地将图像数据从 8 位转换为 1 位。如果是这种情况,并且您没有特定理由使用自己的代码从头开始执行此操作,则可以使用 System.Drawing.Bitmap 和 System.Drawing.Imaging.ImageCodecInfo 简化创建有效 TIFF 文件的任务。这允许您保存未压缩的 1 位 TIFF 或具有不同压缩类型的压缩文件。代码如下:
// first convert from byte[] to pointer
IntPtr pData = Marshal.AllocHGlobal(imgData.Length);
Marshal.Copy(imgData, 0, pData, imgData.Length);
int bytesPerLine = (imgWidth + 31) / 32 * 4; //stride must be a multiple of 4. Make sure the byte array already has enough padding for each scan line if needed
System.Drawing.Bitmap img = new Bitmap(imgWidth, imgHeight, bytesPerLine, PixelFormat.Format1bppIndexed, pData);
ImageCodecInfo TiffCodec = null;
foreach (ImageCodecInfo codec in ImageCodecInfo.GetImageEncoders())
if (codec.MimeType == "image/tiff")
{
TiffCodec = codec;
break;
}
EncoderParameters parameters = new EncoderParameters(2);
parameters.Param[0] = new EncoderParameter(Encoder.Compression, (long)EncoderValue.CompressionLZW);
parameters.Param[1] = new EncoderParameter(Encoder.ColorDepth, (long)1);
img.Save("OnebitLzw.tif", TiffCodec, parameters);
parameters.Param[0] = new EncoderParameter(Encoder.Compression, (long)EncoderValue.CompressionCCITT4);
img.Save("OnebitFaxGroup4.tif", TiffCodec, parameters);
parameters.Param[0] = new EncoderParameter(Encoder.Compression, (long)EncoderValue.CompressionNone);
img.Save("OnebitUncompressed.tif", TiffCodec, parameters);
img.Dispose();
Marshal.FreeHGlobal(pData); //important to not get memory leaks