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ExifDictionary Class

This class represents a dictionary of EXIF fields.

Namespace: Aurigma.GraphicsMill.Codecs
Assembly: Aurigma.GraphicsMill (in Aurigma.GraphicsMill.dll)

Syntax

Visual Basic
Public Class ExifDictionary _
	Inherits MetadataDictionary
C#
public class ExifDictionary : MetadataDictionary

Remarks

All functionality of this class is implemented in base class MetadataDictionary. To put or get some EXIF field, you should use the Item[Object] property. Just pass ID of the EXIF field as an argument into this property. Refer EXIF specification for exact field ID values. Alternatively you can use static members Artist, DateTime, Make, Orientation, and others. Exact interpretations of these parameters can be found at EXIF specification. Currently specification 2.2 is supported.

Examples

The code below demonstrates how to extract and display both EXIF and IPTC data.

Visual Basic
Dim bitmap As New Aurigma.GraphicsMill.Bitmap

'Read bitmap and metadata
Dim jpegReader As New Aurigma.GraphicsMill.Codecs.JpegReader("C:\IMG_0001.jpg")

'Read metadata
Dim exif As Aurigma.GraphicsMill.Codecs.ExifDictionary = jpegReader.Exif
Dim iptc As Aurigma.GraphicsMill.Codecs.IptcDictionary = jpegReader.Iptc

'Read bitmap
Dim frame As Aurigma.GraphicsMill.Codecs.Frame = jpegReader.LoadFrame(0)
frame.GetBitmap(bitmap)

frame.Dispose()

jpegReader.Dispose()

'Show EXIF tags
If Not exif Is Nothing Then
    Console.WriteLine("EXIF")
    Console.WriteLine("---------------")
    For Each key As Long In exif.Keys
        Console.WriteLine("{0}: {1}, {2}", exif.GetKeyDescription(key), _
         exif.Item(key), exif.GetItemString(key))
    Next
End If

'Show IPTC tags
If Not iptc Is Nothing Then
    Console.WriteLine("IPTC")
    Console.WriteLine("---------------")
    For Each key As Long In iptc.Keys
        Console.WriteLine("{0}: {1}, {2}", iptc.GetKeyDescription(key), _
         iptc.Item(key), iptc.GetItemString(key))
    Next
End If

'Process bitmap...
bitmap.Transforms.RotateAndFlip(System.Drawing.RotateFlipType.Rotate90FlipNone)

'...
C#
using (Aurigma.GraphicsMill.Bitmap bitmap =
    new Aurigma.GraphicsMill.Bitmap())
{
    //Read bitmap and metadata
    Aurigma.GraphicsMill.Codecs.ExifDictionary exif = null;
    Aurigma.GraphicsMill.Codecs.IptcDictionary iptc = null;

    using (Aurigma.GraphicsMill.Codecs.JpegReader jpegReader =
        new Aurigma.GraphicsMill.Codecs.JpegReader(@"C:\IMG_0001.jpg"))
    {
        //Read metadata
        exif = jpegReader.Exif;
        iptc = jpegReader.Iptc;

        //Read bitmap
        using (Aurigma.GraphicsMill.Codecs.IFrame frame = jpegReader.LoadFrame(0))
        {
            frame.GetBitmap(bitmap);
        }
    }
    //Show EXIF tags
    if (exif != null)
    {
        Console.WriteLine("EXIF");
        Console.WriteLine("---------------");
        foreach (long key in exif.Keys)
        {
            Console.WriteLine("{0}: {1}, {2}", exif.GetKeyDescription(key),
                exif[key], exif.GetItemString(key));
        }
    }

    //Show IPTC tags
    if (iptc != null)
    {
        Console.WriteLine("IPTC");
        Console.WriteLine("---------------");
        foreach (long key in iptc.Keys)
        {
            Console.WriteLine("{0}: {1}, {2}", iptc.GetKeyDescription(key),
                iptc[key], iptc.GetItemString(key));
        }
    }

    //Process bitmap...
    bitmap.Transforms.RotateAndFlip(System.Drawing.RotateFlipType.Rotate90FlipNone);

    //...
}

Inheritance Hierarchy

Thread Safety

Static members of this type are safe for multi-threaded operations. Instance members of this type are safe for multi-threaded operations.

See Also

Reference