public static Bitmap ConvertTiffInfoToBitmap(DoubleByteTiffInfo info)
{
var result = new Bitmap(info.Width, info.Height, PixelFormat.Format24bppRgb);
byte[] buffer8Bit = null;
for (int i = 0; i < info.Height; i++)
{
Rectangle imgRect = new Rectangle(0, i, info.Width, 1);
BitmapData imgData = result.LockBits(imgRect, ImageLockMode.WriteOnly, PixelFormat.Format24bppRgb);
if (buffer8Bit == null)
{
buffer8Bit = new byte[imgData.Stride];
}
else
{
Array.Clear(buffer8Bit, 0, buffer8Bit.Length);
}
for (int dst = 0, j = 0; j < info.Width; j++)
{
ushort value16 = info.UshortBuffer[i][j];
buffer8Bit[dst++] = (byte)(value16 / 257.0 + 0.5);
buffer8Bit[dst++] = (byte)(value16 / 257.0 + 0.5);
buffer8Bit[dst++] = (byte)(value16 / 257.0 + 0.5);
}
Marshal.Copy(buffer8Bit, 0, imgData.Scan0, buffer8Bit.Length);
result.UnlockBits(imgData);
}
return(result);
}
private static void VerifyDoubleBitTiffInfo(DoubleByteTiffInfo info)
{
if (info == null)
{
throw new ArgumentNullException("info");
}
if (info.UshortBuffer == null || info.UshortBuffer.Count <= 0)
{
throw new ArgumentNullException("info.UshortBuffer");
}
if (string.IsNullOrWhiteSpace(info.FilePath))
{
throw new ArgumentNullException("info.FilePath");
}
//如果不创建目录，图像不能生成
var dir = Path.GetDirectoryName(info.FilePath);
if (string.IsNullOrWhiteSpace(dir))
{
throw new NullReferenceException("dir");
}
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
}
/// <summary>
/// 读取一个16bit Tiff图像
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public static List <DoubleByteTiffInfo> ReadDoubleByteTiff(string path)
{
if (string.IsNullOrWhiteSpace(path))
{
throw new ArgumentNullException("path");
}
List <DoubleByteTiffInfo> tiffs = new List <DoubleByteTiffInfo>();
using (var tiff = BitMiracle.LibTiff.Classic.Tiff.Open(path, ReadMode))
{
int width = tiff.GetField(TiffTag.IMAGEWIDTH)[0].ToInt();
int height = tiff.GetField(TiffTag.IMAGELENGTH)[0].ToInt();
byte[] scanline = new byte[tiff.ScanlineSize()];
for (short i = 0; i < tiff.NumberOfDirectories(); i++)
{
tiff.SetDirectory(i);
var doubleByteTiffInfo = new DoubleByteTiffInfo(width, height);
for (int j = 0; j < height; j++)
{
tiff.ReadScanline(scanline, j);
var scanline16Bit = new ushort[tiff.ScanlineSize() >> 1];
Buffer.BlockCopy(scanline, 0, scanline16Bit, 0, scanline.Length);
doubleByteTiffInfo.UshortBuffer.Add(scanline16Bit);
}
tiffs.Add(doubleByteTiffInfo);
}
}
return(tiffs);
}
public static void Create16BitGrayScaleTiff(DoubleByteTiffInfo info)
{
VerifyDoubleBitTiffInfo(info);
using (var image = BitMiracle.LibTiff.Classic.Tiff.Open(info.FilePath, WriteMode))
{
SetTiffField(info, image);
int bytesPerRow = info.Width * sizeof(ushort);
byte[] tempBuffer = new byte[bytesPerRow];
for (int i = 0; i < info.Height; i++)
{
Buffer.BlockCopy(info.UshortBuffer[i], 0, tempBuffer, 0, bytesPerRow);
image.WriteScanline(tempBuffer, i);
}
}
}
/// <summary>
/// 纵向均匀切割Tiff图像，返回数据链表
/// </summary>
/// <param name="tiff"></param>
/// <param name="count">切割的分块数</param>
/// <returns></returns>
public static List <DoubleByteTiffInfo> SliceVetically(DoubleByteTiffInfo tiff, int count)
{
var originalWidth = tiff.Width;
var newWidth = originalWidth / count;
var newBytesWidth = newWidth * sizeof(ushort);
var tiffLists = new List <DoubleByteTiffInfo>();
for (int i = 0; i < count; i++)
{
DoubleByteTiffInfo info = new DoubleByteTiffInfo(newWidth, tiff.Height);
for (int j = 0; j < tiff.Height; j++)
{
ushort[] temp = new ushort[newWidth];
Buffer.BlockCopy(tiff.UshortBuffer[j], newBytesWidth * i, temp, 0, newBytesWidth);
info.UshortBuffer.Add(temp);
}
tiffLists.Add(info);
}
return(tiffLists);
}
