ASP.NET读取照片EXIF信息来获取相机型号
网上可用的ASP.NET读取照片的EXIF信息的资料是在不多，翻来覆去就是那么两篇。综合了一些写的还算好的代码，我先在这里做一个用ASP.NET读取相片获得数码相机型号的例子吧！
ReadJpegEXIF.aspx
这个文件就自己写吧，拖一个 HtmlInputFile 和 button 就行了。
ReadJpegEXIF.cs
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
namespace digiphoto.test
{
///
/// ReadJpegEXIF 的摘要说明。
///
public class ReadJpegEXIF : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.HtmlControls.HtmlInputFile File1;
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
}
#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
///
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
///
private void InitializeComponent()
{
this.Button1.Click += new System.EventHandler(this.Button1_Click);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void Button1_Click(object sender, System.EventArgs e)
{
HttpPostedFile MyPostedFile = Request.Files["File1"];
System.Drawing.Bitmap bmp = new Bitmap(MyPostedFile.FileName);
EXIF.EXIFextractor er = new EXIF.EXIFextractor(ref bmp, "\n");
Response.Write(MyPostedFile.FileName+"
");
Response.Write(er["Equip Model"]);//获取数码相机的型号
// foreach (EXIF.Pair pr in er)
// {
// //这里循环可以获得基本上所有的EXIF信息，想取哪个就取哪个好了。
// Response.Write(pr.First + ":" + pr.Second + "
");
// }
}
}
}
下面的两个文件处理JPG的EXIF信息
EXIFextractor.cs
using System;
using System.Text;
using System.Collections;
using System.Drawing.Imaging;
using System.Reflection;
using System.IO;
namespace EXIF
{
///
/// EXIFextractor Class
///
///
public class EXIFextractor : IEnumerable
{
///
/// Get the individual property value by supplying property name
/// These are the valid property names :
///
/// "Exif IFD"
/// "Gps IFD"
/// "New Subfile Type"
/// "Subfile Type"
/// "Image Width"
/// "Image Height"
/// "Bits Per Sample"
/// "Compression"
/// "Photometric Interp"
/// "Thresh Holding"
/// "Cell Width"
/// "Cell Height"
/// "Fill Order"
/// "Document Name"
/// "Image Description"
/// "Equip Make"
/// "Equip Model"
/// "Strip Offsets"
/// "Orientation"
/// "Samples PerPixel"
/// "Rows Per Strip"
/// "Strip Bytes Count"
/// "Min Sample Value"
/// "Max Sample Value"
/// "X Resolution"
/// "Y Resolution"
/// "Planar Config"
/// "Page Name"
/// "X Position"
/// "Y Position"
/// "Free Offset"
/// "Free Byte Counts"
/// "Gray Response Unit"
/// "Gray Response Curve"
/// "T4 Option"
/// "T6 Option"
/// "Resolution Unit"
/// "Page Number"
/// "Transfer Funcition"
/// "Software Used"
/// "Date Time"
/// "Artist"
/// "Host Computer"
/// "Predictor"
/// "White Point"
/// "Primary Chromaticities"
/// "ColorMap"
/// "Halftone Hints"
/// "Tile Width"
/// "Tile Length"
/// "Tile Offset"
/// "Tile ByteCounts"
/// "InkSet"
/// "Ink Names"
/// "Number Of Inks"
/// "Dot Range"
/// "Target Printer"
/// "Extra Samples"
/// "Sample Format"
/// "S Min Sample Value"
/// "S Max Sample Value"
/// "Transfer Range"
/// "JPEG Proc"
/// "JPEG InterFormat"
/// "JPEG InterLength"
/// "JPEG RestartInterval"
/// "JPEG LosslessPredictors"
/// "JPEG PointTransforms"
/// "JPEG QTables"
/// "JPEG DCTables"
/// "JPEG ACTables"
/// "YCbCr Coefficients"
/// "YCbCr Subsampling"
/// "YCbCr Positioning"
/// "REF Black White"
/// "ICC Profile"
/// "Gamma"
/// "ICC Profile Descriptor"
/// "SRGB RenderingIntent"
/// "Image Title"
/// "Copyright"
/// "Resolution X Unit"
/// "Resolution Y Unit"
/// "Resolution X LengthUnit"
/// "Resolution Y LengthUnit"
/// "Print Flags"
/// "Print Flags Version"
/// "Print Flags Crop"
/// "Print Flags Bleed Width"
/// "Print Flags Bleed Width Scale"
/// "Halftone LPI"
/// "Halftone LPIUnit"
/// "Halftone Degree"
/// "Halftone Shape"
/// "Halftone Misc"
/// "Halftone Screen"
/// "JPEG Quality"
/// "Grid Size"
/// "Thumbnail Format"
/// "Thumbnail Width"
/// "Thumbnail Height"
/// "Thumbnail ColorDepth"
/// "Thumbnail Planes"
/// "Thumbnail RawBytes"
/// "Thumbnail Size"
/// "Thumbnail CompressedSize"
/// "Color Transfer Function"
/// "Thumbnail Data"
/// "Thumbnail ImageWidth"
/// "Thumbnail ImageHeight"
/// "Thumbnail BitsPerSample"
/// "Thumbnail Compression"
/// "Thumbnail PhotometricInterp"
/// "Thumbnail ImageDescription"
/// "Thumbnail EquipMake"
/// "Thumbnail EquipModel"
/// "Thumbnail StripOffsets"
/// "Thumbnail Orientation"
/// "Thumbnail SamplesPerPixel"
/// "Thumbnail RowsPerStrip"
/// "Thumbnail StripBytesCount"
/// "Thumbnail ResolutionX"
/// "Thumbnail ResolutionY"
/// "Thumbnail PlanarConfig"
/// "Thumbnail ResolutionUnit"
/// "Thumbnail TransferFunction"
/// "Thumbnail SoftwareUsed"
/// "Thumbnail DateTime"
/// "Thumbnail Artist"
/// "Thumbnail WhitePoint"
/// "Thumbnail PrimaryChromaticities"
/// "Thumbnail YCbCrCoefficients"
/// "Thumbnail YCbCrSubsampling"
/// "Thumbnail YCbCrPositioning"
/// "Thumbnail RefBlackWhite"
/// "Thumbnail CopyRight"
/// "Luminance Table"
/// "Chrominance Table"
/// "Frame Delay"
/// "Loop Count"
/// "Pixel Unit"
/// "Pixel PerUnit X"
/// "Pixel PerUnit Y"
/// "Palette Histogram"
/// "Exposure Time"
/// "F-Number"
/// "Exposure Prog"
/// "Spectral Sense"
/// "ISO Speed"
/// "OECF"
/// "Ver"
/// "DTOrig"
/// "DTDigitized"
/// "CompConfig"
/// "CompBPP"
/// "Shutter Speed"
/// "Aperture"
/// "Brightness"
/// "Exposure Bias"
/// "MaxAperture"
/// "SubjectDist"
/// "Metering Mode"
/// "LightSource"
/// "Flash"
/// "FocalLength"
/// "Maker Note"
/// "User Comment"
/// "DTSubsec"
/// "DTOrigSS"
/// "DTDigSS"
/// "FPXVer"
/// "ColorSpace"
/// "PixXDim"
/// "PixYDim"
/// "RelatedWav"
/// "Interop"
/// "FlashEnergy"
/// "SpatialFR"
/// "FocalXRes"
/// "FocalYRes"
/// "FocalResUnit"
/// "Subject Loc"
/// "Exposure Index"
/// "Sensing Method"
/// "FileSource"
/// "SceneType"
/// "CfaPattern"
/// "Gps Ver"
/// "Gps LatitudeRef"
/// "Gps Latitude"
/// "Gps LongitudeRef"
/// "Gps Longitude"
/// "Gps AltitudeRef"
/// "Gps Altitude"
/// "Gps GpsTime"
/// "Gps GpsSatellites"
/// "Gps GpsStatus"
/// "Gps GpsMeasureMode"
/// "Gps GpsDop"
/// "Gps SpeedRef"
/// "Gps Speed"
/// "Gps TrackRef"
/// "Gps Track"
/// "Gps ImgDirRef"
/// "Gps ImgDir"
/// "Gps MapDatum"
/// "Gps DestLatRef"
/// "Gps DestLat"
/// "Gps DestLongRef"
/// "Gps DestLong"
/// "Gps DestBearRef"
/// "Gps DestBear"
/// "Gps DestDistRef"
/// "Gps DestDist"
///
public object this[string index]
{
get
{
return properties[index];
}
}
//
private System.Drawing.Bitmap bmp;
//
private string data;
//
private translation myHash;
//
private Hashtable properties;
//
internal int Count
{
get
{
return this.properties.Count;
}
}
//
string sp;
///
///
///
///
///
///
///
public void setTag(int id, string data)
{
Encoding ascii = Encoding.ASCII;
this.setTag(id, data.Length, 0x2, ascii.GetBytes(data));
}
///
///
///
///
///
///
///
public void setTag(int id, int len, short type, byte[] data)
{
PropertyItem p = CreatePropertyItem(type, id, len, data);
this.bmp.SetPropertyItem(p);
buildDB(this.bmp.PropertyItems);
}
///
///
///
///
///
///
///
///
private static PropertyItem CreatePropertyItem(short type, int tag, int len, byte[] value)
{
PropertyItem item;
// Loads a PropertyItem from a Jpeg image stored in the assembly as a resource.
Assembly assembly = Assembly.GetExecutingAssembly();
Stream emptyBitmapStream = assembly.GetManifestResourceStream("EXIFextractor.decoy.jpg");
System.Drawing.Image empty = System.Drawing.Image.FromStream(emptyBitmapStream);
item = empty.PropertyItems[0];
// Copies the data to the property item.
item.Type = type;
item.Len = len;
item.Id = tag;
item.Value = new byte[value.Length];
value.CopyTo(item.Value, 0);
return item;
}
///
///
///
///
///
public EXIFextractor(ref System.Drawing.Bitmap bmp, string sp)
{
properties = new Hashtable();
//
this.bmp = bmp;
this.sp = sp;
//
myHash = new translation();
buildDB(this.bmp.PropertyItems);
}
string msp = "";
public EXIFextractor(ref System.Drawing.Bitmap bmp, string sp, string msp)
{
properties = new Hashtable();
this.sp = sp;
this.msp = msp;
this.bmp = bmp;
//
myHash = new translation();
this.buildDB(bmp.PropertyItems);
}
public static PropertyItem[] GetExifProperties(string fileName)
{
FileStream stream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
System.Drawing.Image image = System.Drawing.Image.FromStream(stream,
/* useEmbeddedColorManagement = */ true,
/* validateImageData = */ false);
return image.PropertyItems;
}
public EXIFextractor(string file, string sp, string msp)
{
properties = new Hashtable();
this.sp = sp;
this.msp = msp;
myHash = new translation();
//
this.buildDB(GetExifProperties(file));
}
///
///
///
private void buildDB(System.Drawing.Imaging.PropertyItem[] parr)
{
properties.Clear();
//
data = "";
//
Encoding ascii = Encoding.ASCII;
//
foreach (System.Drawing.Imaging.PropertyItem p in parr)
{
string v = "";
string name = (string)myHash[p.Id];
// tag not found. skip it
if (name == null) continue;
//
data += name + ": ";
//
//1 = BYTE An 8-bit unsigned integer.,
if (p.Type == 0x1)
{
v = p.Value[0].ToString();
}
//2 = ASCII An 8-bit byte containing one 7-bit ASCII code. The final byte is terminated with NULL.,
else if (p.Type == 0x2)
{
// string
v = ascii.GetString(p.Value);
}
//3 = SHORT A 16-bit (2 -byte) unsigned integer,
else if (p.Type == 0x3)
{
// orientation // lookup table
switch (p.Id)
{
case 0x8827: // ISO
v = "ISO-" + convertToInt16U(p.Value).ToString();
break;
case 0xA217: // sensing method
{
switch (convertToInt16U(p.Value))
{
case 1: v = "Not defined"; break;
case 2: v = "One-chip color area sensor"; break;
case 3: v = "Two-chip color area sensor"; break;
case 4: v = "Three-chip color area sensor"; break;
case 5: v = "Color sequential area sensor"; break;
case 7: v = "Trilinear sensor"; break;
case 8: v = "Color sequential linear sensor"; break;
default: v = " reserved"; break;
}
}
break;
case 0x8822: // aperture
switch (convertToInt16U(p.Value))
{
case 0: v = "Not defined"; break;
case 1: v = "Manual"; break;
case 2: v = "Normal program"; break;
case 3: v = "Aperture priority"; break;
case 4: v = "Shutter priority"; break;
case 5: v = "Creative program (biased toward depth of field)"; break;
case 6: v = "Action program (biased toward fast shutter speed)"; break;
case 7: v = "Portrait mode (for closeup photos with the background out of focus)"; break;
case 8: v = "Landscape mode (for landscape photos with the background in focus)"; break;
default: v = "reserved"; break;
}
break;
case 0x9207: // metering mode
switch (convertToInt16U(p.Value))
{
case 0: v = "unknown"; break;
case 1: v = "Average"; break;
case 2: v = "CenterWeightedAverage"; break;
case 3: v = "Spot"; break;
case 4: v = "MultiSpot"; break;
case 5: v = "Pattern"; break;
case 6: v = "Partial"; break;
case 255: v = "Other"; break;
default: v = "reserved"; break;
}
break;
case 0x9208: // light source
{
switch (convertToInt16U(p.Value))
{
case 0: v = "unknown"; break;
case 1: v = "Daylight"; break;
case 2: v = "Fluorescent"; break;
case 3: v = "Tungsten"; break;
case 17: v = "Standard light A"; break;
case 18: v = "Standard light B"; break;
case 19: v = "Standard light C"; break;
case 20: v = "D55"; break;
case 21: v = "D65"; break;
case 22: v = "D75"; break;
case 255: v = "other"; break;
default: v = "reserved"; break;
}
}
break;
case 0x9209:
{
switch (convertToInt16U(p.Value))
{
case 0: v = "Flash did not fire"; break;
case 1: v = "Flash fired"; break;
case 5: v = "Strobe return light not detected"; break;
case 7: v = "Strobe return light detected"; break;
default: v = "reserved"; break;
}
}
break;
default:
v = convertToInt16U(p.Value).ToString();
break;
}
}
//4 = LONG A 32-bit (4 -byte) unsigned integer,
else if (p.Type == 0x4)
{
// orientation // lookup table
v = convertToInt32U(p.Value).ToString();
}
//5 = RATIONAL Two LONGs. The first LONG is the numerator and the second LONG expresses the//denominator.,
else if (p.Type == 0x5)
{
// rational
byte[] n = new byte[p.Len / 2];
byte[] d = new byte[p.Len / 2];
Array.Copy(p.Value, 0, n, 0, p.Len / 2);
Array.Copy(p.Value, p.Len / 2, d, 0, p.Len / 2);
uint a = convertToInt32U(n);
uint b = convertToInt32U(d);
Rational r = new Rational(a, b);
//
//convert here
//
switch (p.Id)
{
case 0x9202: // aperture
v = "F/" + Math.Round(Math.Pow(Math.Sqrt(2), r.ToDouble()), 2).ToString();
break;
case 0x920A:
v = r.ToDouble().ToString();
break;
case 0x829A:
v = r.ToDouble().ToString();
break;
case 0x829D: // F-number
v = "F/" + r.ToDouble().ToString();
break;
default:
v = r.ToString("/");
break;
}
}
//7 = UNDEFINED An 8-bit byte that can take any value depending on the field definition,
else if (p.Type == 0x7)
{
switch (p.Id)
{
case 0xA300:
{
if (p.Value[0] == 3)
{
v = "DSC";
}
else
{
v = "reserved";
}
break;
}
case 0xA301:
if (p.Value[0] == 1)
v = "A directly photographed image";
else
v = "Not a directly photographed image";
break;
default:
v = "-";
break;
}
}
//9 = SLONG A 32-bit (4 -byte) signed integer (2´s complement notation),
else if (p.Type == 0x9)
{
v = convertToInt32(p.Value).ToString();
}
//10 = SRATIONAL Two SLONGs. The first SLONG is the numerator and the second SLONG is the
//denominator.
else if (p.Type == 0xA)
{
// rational
byte[] n = new byte[p.Len / 2];
byte[] d = new byte[p.Len / 2];
Array.Copy(p.Value, 0, n, 0, p.Len / 2);
Array.Copy(p.Value, p.Len / 2, d, 0, p.Len / 2);
int a = convertToInt32(n);
int b = convertToInt32(d);
Rational r = new Rational(a, b);
//
// convert here
//
switch (p.Id)
{
case 0x9201: // shutter speed
v = "1/" + Math.Round(Math.Pow(2, r.ToDouble()), 2).ToString();
break;
case 0x9203:
v = Math.Round(r.ToDouble(), 4).ToString();
break;
default:
v = r.ToString("/");
break;
}
}
// add it to the list
if (properties[name] == null)
properties.Add(name, v);
// cat it too
data += v;
data += this.sp;
}
}
///
///
///
///
public override string ToString()
{
return data;
}
///
///
///
///
///
int convertToInt32(byte[] arr)
{
if (arr.Length != 4)
return 0;
else
return arr[3] << 24 | arr[2] << 16 | arr[1] << 8 | arr[0];
}
///
///
///
///
///
int convertToInt16(byte[] arr)
{
if (arr.Length != 2)
return 0;
else
return arr[1] << 8 | arr[0];
}
///
///
///
///
///
uint convertToInt32U(byte[] arr)
{
if (arr.Length != 4)
return 0;
else
return Convert.ToUInt32(arr[3] << 24 | arr[2] << 16 | arr[1] << 8 | arr[0]);
}
///
///
///
///
///
uint convertToInt16U(byte[] arr)
{
if (arr.Length != 2)
return 0;
else
return Convert.ToUInt16(arr[1] << 8 | arr[0]);
}
#region IEnumerable Members
public IEnumerator GetEnumerator()
{
// TODO: Add EXIFextractor.GetEnumerator implementation
return (new EXIFextractorEnumerator(this.properties));
}
#endregion
}
//
// dont touch this class. its for IEnumerator
//
//
class EXIFextractorEnumerator : IEnumerator
{
Hashtable exifTable;
IDictionaryEnumerator index;
internal EXIFextractorEnumerator(Hashtable exif)
{
this.exifTable = exif;
this.Reset();
index = exif.GetEnumerator();
}
#region IEnumerator Members
public void Reset()
{
this.index = null;
}
public object Current
{
get
{
return (new Pair(this.index.Key, this.index.Value));
}
}
public bool MoveNext()
{
if (index != null && index.MoveNext())
return true;
else
return false;
}
#endregion
}
public class Pair
{
public string First;
public string Second;
public Pair(object key, object value)
{
this.First = key.ToString();
this.Second = value.ToString();
}
}
}
translation.cs
using System;
using System.Collections.Generic;
using System.Collections;
using System.Text;
namespace EXIF
{
///
/// Summary description for translation.
///
public class translation : Hashtable
{
///
///
///
public translation()
{
this.Add(0x8769,"Exif IFD");
this.Add(0x8825,"Gps IFD");
this.Add(0xFE,"New Subfile Type");
this.Add(0xFF,"Subfile Type");
this.Add(0x100,"Image Width");
this.Add(0x101,"Image Height");
this.Add(0x102,"Bits Per Sample");
this.Add(0x103,"Compression");
this.Add(0x106,"Photometric Interp");
this.Add(0x107,"Thresh Holding");
this.Add(0x108,"Cell Width");
this.Add(0x109,"Cell Height");
this.Add(0x10A,"Fill Order");
this.Add(0x10D,"Document Name");
this.Add(0x10E,"Image Description");
this.Add(0x10F,"Equip Make");
this.Add(0x110,"Equip Model");
this.Add(0x111,"Strip Offsets");
this.Add(0x112,"Orientation");
this.Add(0x115,"Samples PerPixel");
this.Add(0x116,"Rows Per Strip");
this.Add(0x117,"Strip Bytes Count");
this.Add(0x118,"Min Sample Value");
this.Add(0x119,"Max Sample Value");
this.Add(0x11A,"X Resolution");
this.Add(0x11B,"Y Resolution");
this.Add(0x11C,"Planar Config");
this.Add(0x11D,"Page Name");
this.Add(0x11E,"X Position");
this.Add(0x11F,"Y Position");
this.Add(0x120,"Free Offset");
this.Add(0x121,"Free Byte Counts");
this.Add(0x122,"Gray Response Unit");
this.Add(0x123,"Gray Response Curve");
this.Add(0x124,"T4 Option");
this.Add(0x125,"T6 Option");
this.Add(0x128,"Resolution Unit");
this.Add(0x129,"Page Number");
this.Add(0x12D,"Transfer Funcition");
this.Add(0x131,"Software Used");
this.Add(0x132,"Date Time");
this.Add(0x13B,"Artist");
this.Add(0x13C,"Host Computer");
this.Add(0x13D,"Predictor");
this.Add(0x13E,"White Point");
this.Add(0x13F,"Primary Chromaticities");
this.Add(0x140,"ColorMap");
this.Add(0x141,"Halftone Hints");
this.Add(0x142,"Tile Width");
this.Add(0x143,"Tile Length");
this.Add(0x144,"Tile Offset");
this.Add(0x145,"Tile ByteCounts");
this.Add(0x14C,"InkSet");
this.Add(0x14D,"Ink Names");
this.Add(0x14E,"Number Of Inks");
this.Add(0x150,"Dot Range");
this.Add(0x151,"Target Printer");
this.Add(0x152,"Extra Samples");
this.Add(0x153,"Sample Format");
this.Add(0x154,"S Min Sample Value");
this.Add(0x155,"S Max Sample Value");
this.Add(0x156,"Transfer Range");
this.Add(0x200,"JPEG Proc");
this.Add(0x201,"JPEG InterFormat");
this.Add(0x202,"JPEG InterLength");
this.Add(0x203,"JPEG RestartInterval");
this.Add(0x205,"JPEG LosslessPredictors");
this.Add(0x206,"JPEG PointTransforms");
this.Add(0x207,"JPEG QTables");
this.Add(0x208,"JPEG DCTables");
this.Add(0x209,"JPEG ACTables");
this.Add(0x211,"YCbCr Coefficients");
this.Add(0x212,"YCbCr Subsampling");
this.Add(0x213,"YCbCr Positioning");
this.Add(0x214,"REF Black White");
this.Add(0x8773,"ICC Profile");
this.Add(0x301,"Gamma");
this.Add(0x302,"ICC Profile Descriptor");
this.Add(0x303,"SRGB RenderingIntent");
this.Add(0x320,"Image Title");
this.Add(0x8298,"Copyright");
this.Add(0x5001,"Resolution X Unit");
this.Add(0x5002,"Resolution Y Unit");
this.Add(0x5003,"Resolution X LengthUnit");
this.Add(0x5004,"Resolution Y LengthUnit");
this.Add(0x5005,"Print Flags");
this.Add(0x5006,"Print Flags Version");
this.Add(0x5007,"Print Flags Crop");
this.Add(0x5008,"Print Flags Bleed Width");
this.Add(0x5009,"Print Flags Bleed Width Scale");
this.Add(0x500A,"Halftone LPI");
this.Add(0x500B,"Halftone LPIUnit");
this.Add(0x500C,"Halftone Degree");
this.Add(0x500D,"Halftone Shape");
this.Add(0x500E,"Halftone Misc");
this.Add(0x500F,"Halftone Screen");
this.Add(0x5010,"JPEG Quality");
this.Add(0x5011,"Grid Size");
this.Add(0x5012,"Thumbnail Format");
this.Add(0x5013,"Thumbnail Width");
this.Add(0x5014,"Thumbnail Height");
this.Add(0x5015,"Thumbnail ColorDepth");
this.Add(0x5016,"Thumbnail Planes");
this.Add(0x5017,"Thumbnail RawBytes");
this.Add(0x5018,"Thumbnail Size");
this.Add(0x5019,"Thumbnail CompressedSize");
this.Add(0x501A,"Color Transfer Function");
this.Add(0x501B,"Thumbnail Data");
this.Add(0x5020,"Thumbnail ImageWidth");
this.Add(0x502,"Thumbnail ImageHeight");
this.Add(0x5022,"Thumbnail BitsPerSample");
this.Add(0x5023,"Thumbnail Compression");
this.Add(0x5024,"Thumbnail PhotometricInterp");
this.Add(0x5025,"Thumbnail ImageDescription");
this.Add(0x5026,"Thumbnail EquipMake");
this.Add(0x5027,"Thumbnail EquipModel");
this.Add(0x5028,"Thumbnail StripOffsets");
this.Add(0x5029,"Thumbnail Orientation");
this.Add(0x502A,"Thumbnail SamplesPerPixel");
this.Add(0x502B,"Thumbnail RowsPerStrip");
this.Add(0x502C,"Thumbnail StripBytesCount");
this.Add(0x502D,"Thumbnail ResolutionX");
this.Add(0x502E,"Thumbnail ResolutionY");
this.Add(0x502F,"Thumbnail PlanarConfig");
this.Add(0x5030,"Thumbnail ResolutionUnit");
this.Add(0x5031,"Thumbnail TransferFunction");
this.Add(0x5032,"Thumbnail SoftwareUsed");
this.Add(0x5033,"Thumbnail DateTime");
this.Add(0x5034,"Thumbnail Artist");
this.Add(0x5035,"Thumbnail WhitePoint");
this.Add(0x5036,"Thumbnail PrimaryChromaticities");
this.Add(0x5037,"Thumbnail YCbCrCoefficients");
this.Add(0x5038,"Thumbnail YCbCrSubsampling");
this.Add(0x5039,"Thumbnail YCbCrPositioning");
this.Add(0x503A,"Thumbnail RefBlackWhite");
this.Add(0x503B,"Thumbnail CopyRight");
this.Add(0x5090,"Luminance Table");
this.Add(0x5091,"Chrominance Table");
this.Add(0x5100,"Frame Delay");
this.Add(0x5101,"Loop Count");
this.Add(0x5110,"Pixel Unit");
this.Add(0x5111,"Pixel PerUnit X");
this.Add(0x5112,"Pixel PerUnit Y");
this.Add(0x5113,"Palette Histogram");
this.Add(0x829A,"Exposure Time");
this.Add(0x829D,"F-Number");
this.Add(0x8822,"Exposure Prog");
this.Add(0x8824,"Spectral Sense");
this.Add(0x8827,"ISO Speed");
this.Add(0x8828,"OECF");
this.Add(0x9000,"Ver");
this.Add(0x9003,"DTOrig");
this.Add(0x9004,"DTDigitized");
this.Add(0x9101,"CompConfig");
this.Add(0x9102,"CompBPP");
this.Add(0x9201,"Shutter Speed");
this.Add(0x9202,"Aperture");
this.Add(0x9203,"Brightness");
this.Add(0x9204,"Exposure Bias");
this.Add(0x9205,"MaxAperture");
this.Add(0x9206,"SubjectDist");
this.Add(0x9207,"Metering Mode");
this.Add(0x9208,"LightSource");
this.Add(0x9209,"Flash");
this.Add(0x920A,"FocalLength");
this.Add(0x927C,"Maker Note");
this.Add(0x9286,"User Comment");
this.Add(0x9290,"DTSubsec");
this.Add(0x9291,"DTOrigSS");
this.Add(0x9292,"DTDigSS");
this.Add(0xA000,"FPXVer");
this.Add(0xA001,"ColorSpace");
this.Add(0xA002,"PixXDim");
this.Add(0xA003,"PixYDim");
this.Add(0xA004,"RelatedWav");
this.Add(0xA005,"Interop");
this.Add(0xA20B,"FlashEnergy");
this.Add(0xA20C,"SpatialFR");
this.Add(0xA20E,"FocalXRes");
this.Add(0xA20F,"FocalYRes");
this.Add(0xA210,"FocalResUnit");
this.Add(0xA214,"Subject Loc");
this.Add(0xA215,"Exposure Index");
this.Add(0xA217,"Sensing Method");
this.Add(0xA300,"FileSource");
this.Add(0xA301,"SceneType");
this.Add(0xA302,"CfaPattern");
this.Add(0x0,"Gps Ver");
this.Add(0x1,"Gps LatitudeRef");
this.Add(0x2,"Gps Latitude");
this.Add(0x3,"Gps LongitudeRef");
this.Add(0x4,"Gps Longitude");
this.Add(0x5,"Gps AltitudeRef");
this.Add(0x6,"Gps Altitude");
this.Add(0x7,"Gps GpsTime");
this.Add(0x8,"Gps GpsSatellites");
this.Add(0x9,"Gps GpsStatus");
this.Add(0xA,"Gps GpsMeasureMode");
this.Add(0xB,"Gps GpsDop");
this.Add(0xC,"Gps SpeedRef");
this.Add(0xD,"Gps Speed");
this.Add(0xE,"Gps TrackRef");
this.Add(0xF,"Gps Track");
this.Add(0x10,"Gps ImgDirRef");
this.Add(0x11,"Gps ImgDir");
this.Add(0x12,"Gps MapDatum");
this.Add(0x13,"Gps DestLatRef");
this.Add(0x14,"Gps DestLat");
this.Add(0x15,"Gps DestLongRef");
this.Add(0x16,"Gps DestLong");
this.Add(0x17,"Gps DestBearRef");
this.Add(0x18,"Gps DestBear");
this.Add(0x19,"Gps DestDistRef");
this.Add(0x1A,"Gps DestDist");
}
}
///
/// private class
///
internal class Rational
{
private int n;
private int d;
public Rational(int n, int d)
{
this.n = n;
this.d = d;
simplify(ref this.n, ref this.d);
}
public Rational(uint n, uint d)
{
this.n = Convert.ToInt32(n);
this.d = Convert.ToInt32(d);
simplify(ref this.n, ref this.d);
}
public Rational()
{
this.n= this.d=0;
}
public string ToString(string sp)
{
if( sp == null ) sp = "/";
return n.ToString() + sp + d.ToString();
}
public double ToDouble()
{
if( d == 0 )
return 0.0;
return Math.Round(Convert.ToDouble(n)/Convert.ToDouble(d),2);
}
private void simplify( ref int a, ref int b )
{
if( a== 0 || b == 0 )
return;
int gcd = euclid(a,b);
a /= gcd;
b /= gcd;
}
private int euclid(int a, int b)
{
if(b==0)
return a;
else
return euclid(b,a%b);
}
}
}