C#读取图片EXIF信息的方法C#读取图片EXIF信息的方法
#endregion#region 数据转换结构
/// summary>
/// 转换数据结构
/// /summary>
public struct MetadataDetail {
public string Hex;//十六进制字符串
public string RawValueAsString;//原始值串
public string DisplayValue;//显示值串
}
#endregion#region EXIF元素结构
/// summary>
//...
C#读取图片EXIF信息的方法
#endregion#region 数据转换结构
/// summary>
/// 转换数据结构
/// /summary>
public struct MetadataDetail {
public string Hex;//十六进制字符串
public string RawValueAsString;//原始值串
public string DisplayValue;//显示值串
}
#endregion#region EXIF元素结构
/// summary>
/// 结构:存储EXIF元素信息
/// /summary>
public struct Metadata
{
public MetadataDetail EquipmentMake; public MetadataDetail CameraModel; public MetadataDetail ExposureTime;//曝光时间
public MetadataDetail Fstop; public MetadataDetail DatePictureTaken; public MetadataDetail ShutterSpeed;// 快门速度
public MetadataDetail MeteringMode;//曝光模式
public MetadataDetail Flash;//闪光灯
public MetadataDetail XResolution; public MetadataDetail YResolution; public MetadataDetail ImageWidth;//照片宽度
public MetadataDetail ImageHeight;//照片高度public MetadataDetail FNumber;//f值,光圈数
public MetadataDetail ExposureProg;//曝光程序
public MetadataDetail SpectralSense;// public MetadataDetail ISOSpeed;//ISO感光度
public MetadataDetail OECF;// public MetadataDetail Ver;//EXIF版本
public MetadataDetail CompConfig;//色彩设置
public MetadataDetail CompBPP;//压缩比率
public MetadataDetail Aperture;//光圈值
public MetadataDetail Brightness;//亮度值Ev
public MetadataDetail ExposureBias;//曝光补偿
public MetadataDetail MaxAperture;//最大光圈值public MetadataDetail
SubjectDist;// 主体距离
public MetadataDetail LightSource;//白平衡
public MetadataDetail FocalLength;//焦距
public MetadataDetail FPXVer;//FlashPix版本
public MetadataDetail ColorSpace;//色彩空间
public MetadataDetail Interop;// public MetadataDetail FlashEnergy;// public MetadataDetail SpatialFR;// public MetadataDetail FocalXRes;// public MetadataDetail FocalYRes;// public MetadataDetail FocalResUnit;// public MetadataDetail ExposureIndex;//曝光指数
public MetadataDetail SensingMethod;//感应方式
public MetadataDetail SceneType;// public MetadataDetail CfaPattern;// }
#endregion#region 查找EXIF元素值
public string LookupEXIFValue(string Description, string Value) {
string DescriptionValue = null;switch(Description)
{
case "MeteringMode":#regionMeteringMode {
switch(Value)
{
case "0":
DescriptionValue = "Unknown";break; case "1":
DescriptionValue = "Average";break; case "2":
DescriptionValue = "Center Weighted Average";break;
case "3":
DescriptionValue = "Spot";break; case "4":
DescriptionValue = "Multi-spot";break; case "5":
DescriptionValue = "Multi-segment";break; case "6":
DescriptionValue = "Partial";break; case "255":
DescriptionValue = "Other";break; }
}
#endregionbreak;
case "ResolutionUnit":#region ResolutionUnit {
switch(Value)
{
case "1":
DescriptionValue = "No Units";break; case "2":
DescriptionValue = "Inch";break; case "3":
DescriptionValue = "Centimeter";break; }
}#endregionbreak;
//省略,行相似代码}
return DescriptionValue;
}
#endregion#region 取得图片的EXIF信息
public Metadata GetEXIFMetaData(string PhotoName)
{
// 创建一个图片的实例
System.Drawing.Image MyImage = System.Drawing.Image.FromFile(PhotoName);
// 创建一个整型数组来存储图像中属性数组的ID
int[] MyPropertyIdList = MyImage.PropertyIdList;
//创建一个封闭图像属性数组的实例
PropertyItem[] MyPropertyItemList = new PropertyItem[MyPropertyIdList.Length];
//创建一个图像EXIT信息的实例结构对象,并且赋初值#region 创建一个图像EXIT信息的实例结构对象,并且赋初值
Metadata MyMetadata = new Metadata(); MyMetadata.EquipmentMake.Hex = "10f"; MyMetadata.CameraModel.Hex = "110"; MyMetadata.DatePictureTaken.Hex = "9003"; MyMetadata.ExposureTime.Hex = "829a"; MyMetadata.Fstop.Hex = "829d";
MyMetadata.ShutterSpeed.Hex = "9201"; MyMetadata.MeteringMode.Hex = "9207"; MyMetadata.Flash.Hex = "9209";
MyMetadata.FNumber.Hex = "829d"; // MyMetadata.ExposureProg.Hex = ""; // MyMetadata.SpectralSense.Hex = "8824"; // MyMetadata.ISOSpeed.Hex = "8827"; // MyMetadata.OECF.Hex = "8828"; // MyMetadata.Ver.Hex = "9000"; // MyMetadata.CompConfig.Hex = "9101"; // MyMetadata.CompBPP.Hex = "9102"; // MyMetadata.Aperture.Hex = "9202"; // MyMetadata.Brightness.Hex = "9203"; // MyMetadata.ExposureBias.Hex = "9204"; // MyMetadata.MaxAperture.Hex = "9205"; //
MyMetadata.SubjectDist.Hex = "9206"; //
MyMetadata.LightSource.Hex = "9208"; //
MyMetadata.FocalLength.Hex = "920a"; //
MyMetadata.FPXVer.Hex = "a000"; //
MyMetadata.ColorSpace.Hex = "a001"; //
MyMetadata.FocalXRes.Hex = "a20e"; //
MyMetadata.FocalYRes.Hex = "a20f"; //
MyMetadata.FocalResUnit.Hex = "a210"; // MyMetadata.ExposureIndex.Hex = "a215"; // MyMetadata.SensingMethod.Hex = "a217"; // MyMetadata.SceneType.Hex = "a301";
MyMetadata.CfaPattern.Hex = "a302";
#endregion// ASCII编码
System.Text.ASCIIEncoding Value = new System.Text.ASCIIEncoding();int index = 0;
int MyPropertyIdListCount=MyPropertyIdList.Length; if(MyPropertyIdListCount!=0)
{
foreach (int MyPropertyId in MyPropertyIdList) {
string hexVal = "";
MyPropertyItemList[index] = MyImage.GetPropertyItem(MyPropertyId);#region 初始化
各属性值
string
myPropertyIdString=MyImage.GetPropertyItem(MyPropertyId).Id.ToString("x");
switch(myPropertyIdString)
{
case "10f":
{
MyMetadata.EquipmentMake.RawValueAsString =BitConverter.ToString(MyImage.GetPropertyItem (MyPropertyId).Value);
MyMetadata.EquipmentMake.DisplayValue = Value.GetString(MyPropertyItemList[index].Value); break;
}case "110":
{
MyMetadata.CameraModel.RawValueAsString =BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.CameraModel.DisplayValue
=Value.GetString(MyPropertyItemList[index].Value); break;}case "9003":
{
MyMetadata.DatePictureTaken.RawValueAsString =BitConverter.ToString(MyImage.GetPropertyItem(MyPropertyId).Value);
MyMetadata.DatePictureTaken.DisplayValue
=Value.GetString(MyPropertyItemList[index].Value); break;
}
//省略,行相似代码
}
#endregionindex++;
}
}MyMetadata.XResolution.DisplayValue = MyImage.HorizontalResolution.ToString();
MyMetadata.YResolution.DisplayValue = MyImage.VerticalResolution.ToString();
MyMetadata.ImageHeight.DisplayValue = MyImage.Height.ToString();
MyMetadata.ImageWidth.DisplayValue = MyImage.Width.ToString();
MyImage.Dispose();
return MyMetadata;
}
#endregion
}
}
然后就是个调用的问
,有了这个类,我如何读取图片的,,,,信息呢,代码如下:
EXIFMetaData em = new EXIFMetaData();
string filePath=Server.MapPath("Test.jpg");//这里可以动态传递图片路径的
EXIFMetaData.Metadata m = em.GetEXIFMetaData(filePath);//这里就是调用,传图片绝对
路径
string exif = m.Ver.DisplayValue;
string camera = m.CameraModel.DisplayValue; string model = m.CameraModel.DisplayValue; string aperture = m.Aperture.DisplayValue; string shutter = m.ShutterSpeed.DisplayValue; string sensitive = m.ExposureIndex.DisplayValue;
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