C# 将多个图片合并成TIFF文件的两种方法
最近需要用到TIF格式的文件，研究了一段时间，终于有点结果了，
发现两种方式，第一种是使用BitMiracle.LibTiff.NET，直接在Nuget上安装即可
，第二种是使用RasterEdge.DocImageSDK，要从官网下载dll包
第一种免费，但是生成的tiff文件大小比原始图片大的多
第二种收费，但是有试用期一个月，效果很好，生成的tiff文件比原图小的多而且不失真。过期之后，只需要到官网下载最新dll,重新引用即可再来一个月试用。。。
先说第二种RasterEdge.DocImageSDK的使用方法：
官网地址：http://www.rasteredge.com/how-to/csharp-imaging/tiff-convert-bmp/
//过期后打开上面 这个网址，重新下载 dll包，重新引用即可 bin x64 4.0
新建一个cmd项目，测试代码如下：
class Program
{
private static byte[] CompressionImage(Stream fileStream, long quality)
{
using (System.Drawing.Image img = System.Drawing.Image.FromStream(fileStream))
{
using (Bitmap bitmap = new Bitmap(img))
{
ImageCodecInfo CodecInfo = GetEncoder(img.RawFormat);
System.Drawing.Imaging.Encoder myEncoder = System.Drawing.Imaging.Encoder.Quality;
EncoderParameters myEncoderParameters = new EncoderParameters(1);
EncoderParameter myEncoderParameter = new EncoderParameter(myEncoder, quality);
myEncoderParameters.Param[0] = myEncoderParameter;
using (MemoryStream ms = new MemoryStream())
{
bitmap.Save(ms, CodecInfo, myEncoderParameters);
myEncoderParameters.Dispose();
myEncoderParameter.Dispose();
return ms.ToArray();
}
}
}
}
private static ImageCodecInfo GetEncoder(ImageFormat format)
{
ImageCodecInfo[] codecs = ImageCodecInfo.GetImageDecoders();
foreach (ImageCodecInfo codec in codecs)
{
if (codec.FormatID == format.Guid)
{ return codec; }
}
return null;
}
static void Main(string[] args)
{
string[] imagePaths = System.IO.Directory.GetFiles(@"D:\images\","*.jpg");
Bitmap[] bmps = new Bitmap[imagePaths.Count()];
for (int i = 0; i < imagePaths.Length; i++)
{
var stream = new FileStream(imagePaths[i], FileMode.Open);
var by = CompressionImage(stream, 100);
stream.Close();
Bitmap tmpBmp = new Bitmap(new MemoryStream(by));
if (tmpBmp != null)
bmps[i] = tmpBmp;
}
ImageOutputOption option = new ImageOutputOption() { Color = ColorType.Color, Compression = ImageCompress.CCITT };
TIFFDocument tifDoc = new TIFFDocument(bmps, option);
if (tifDoc == null)
throw new Exception("Fail to construct TIFF Document");
tifDoc.Save(@"D:\images\test.tif");
}
}
下面说说第二种免费的方式：
新建一个TiffHelper帮助类：
using BitMiracle.LibTiff.Classic;
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
namespace JpgToTiff
{
public class UserErrorHandler : TiffErrorHandler
{
public override void WarningHandler(Tiff tif, string method, string format, params object[] args)
{
//base.WarningHandler(tif, method, format, args);
}
public override void WarningHandlerExt(Tiff tif, object clientData, string method, string format, params object[] args)
{
//base.WarningHandlerExt(tif, clientData, method, format, args);
}
}
public class TiffHelper
{
public static UserErrorHandler m_errorHandler = new UserErrorHandler();
static TiffHelper()
{
Tiff.SetErrorHandler(m_errorHandler);
}
///
/// 合并jpg
///
/// bitmap数组
/// 保存路径
/// 图片质量，1-100
/// 下面是测试代码：
class Program
{
private static byte[] CompressionImage(Stream fileStream, long quality)
{
using (System.Drawing.Image img = System.Drawing.Image.FromStream(fileStream))
{
using (Bitmap bitmap = new Bitmap(img))
{
ImageCodecInfo CodecInfo = GetEncoder(img.RawFormat);
System.Drawing.Imaging.Encoder myEncoder = System.Drawing.Imaging.Encoder.Quality;
EncoderParameters myEncoderParameters = new EncoderParameters(1);
EncoderParameter myEncoderParameter = new EncoderParameter(myEncoder, quality);
myEncoderParameters.Param[0] = myEncoderParameter;
using (MemoryStream ms = new MemoryStream())
{
bitmap.Save(ms, CodecInfo, myEncoderParameters);
myEncoderParameters.Dispose();
myEncoderParameter.Dispose();
return ms.ToArray();
}
}
}
}
private static ImageCodecInfo GetEncoder(ImageFormat format)
{
ImageCodecInfo[] codecs = ImageCodecInfo.GetImageDecoders();
foreach (ImageCodecInfo codec in codecs)
{
if (codec.FormatID == format.Guid)
{ return codec; }
}
return null;
}
static void Main(string[] args)
{
string[] imagePaths = System.IO.Directory.GetFiles(@"D:\images\","*.jpg");
Bitmap[] bmps = new Bitmap[imagePaths.Count()];
for (int i = 0; i < imagePaths.Length; i++)
{
var stream = new FileStream(imagePaths[i], FileMode.Open);
var by = CompressionImage(stream, 100);
stream.Close();
Bitmap tmpBmp = new Bitmap(new MemoryStream(by));
if (tmpBmp != null)
bmps[i] = tmpBmp;
}
TiffHelper.Jpegs2Tiff(bmps, @"D:\images\test.tif", 100);
}
}
可以看到，两个方式生成的tif文件大小简直天壤之别。。。
7个原图大小4.8M,第一种1.36M,
第二种直接23.5M…
也可能是我没有弄好压缩方式。。。。
那我就不晓得了。