Chapter 4: Metadata Magic 87 user’s perspective, metadata creation should be as automatic as possible. Automatic metadata is added when the object is created and could illustrate, for example, the technical attributes of the system, its state, as well as technical attributes of the object. Figure 4-3 shows an example of some of the EXIF metadata attributes and values of an image in JPEG format. File: E:\PICS\IMG_8699.JPG, Make: Canon, Model: Canon EOS 300D DIGITAL, Orientation: Top left, XResolution: 180, YResolution: 180, ResolutionUnit: Inch, DateTime: 2006:11:05 18:45:52, YCbCrPositioning: Centered, ExifOffset: 196, ExposureTime: 2 seconds, FNumber: 5.60, ISOSpeedRatings: 400, ExifVersion: 0221, DateTimeOriginal: 2006:11:05 18:45:52, DateTimeDigitized: 2006:11:05 18:45:52, ComponentsConfiguration: YCbCr, CompressedBitsPerPixel: 3 (bits/pixel), ShutterSpeedValue: 2 seconds, ApertureValue: F 5.60, ExposureBiasValue: 0.00, MaxApertureValue: F 3.50, MeteringMode: Multi-segment, Flash: Not fired, compulsory flash mode, FocalLength: 22 mm, UserComment: , FlashPixVersion: 0100, ColorSpace: sRGB, ExifImageWidth: 3072, ExifImageHeight: 2048, InteroperabilityOffset: 2366, FocalPlaneXResolution: 3443.95, FocalPlaneYResolution: 3442.02, FocalPlaneResolutionUnit: Inch, SensingMethod: One-chip color area sensor, FileSource: DSC: Digital still camera, CustomRendered: Normal process, ExposureMode: Auto, WhiteBalance: Auto, SceneCaptureType: Landscape, Maker Note (Vendor):, Macro mode: Off, Self timer: Off, Quality: Fine, Flash mode: Auto + red-eye reduction, Sequence mode: Single or Timer, Focus mode: One-Shot, Image size: Large, Easy shooting mode: Landscape, Digital zoom: None, Contrast: High, +1, Saturation: High, +1, Sharpness: High, +1, ISO Value: 400, Metering mode: Evaluative, Focus type: Auto, AF point selected:, Exposure mode: Easy shooting, Focal length: 18: 55 mm (1 mm), Flash activity: Not fired, Flash details:, Focus mode 2: 65535, White Balance: Auto, Sequence number: 0, Flash bias: 0.00 EV, Subject Distance: 65535, File number: 000: 0000, Image Type: IMG:EOS 300D DIGITAL JPEG, Firmware Version: Firmware Version 1.1.1, Camera Serial Number: 1570502381, Image Number: 2868699, Owner Name: MarjaN Figure 4-3. EXIF metadata as stored by a digital camera in a photo.