Exif

Exif
Exchangeable image file format - Wikipedia, the free encyclopedia

"Exchangeable image file format (officially Exif, not EXIF according to JEIDA/JEITA/CIPA specifications) is a standard that specifies the formats for images, sound, and ancillary tags used by digital cameras (including smartphones), scanners and other systems handling image and sound files recorded by digital cameras. The specification uses the following existing file formats with the addition of specific metadata tags: JPEG discrete cosine transform (DCT) for compressed image files, TIFF Rev. 6.0 (RGB or YCbCr) for uncompressed image files, and RIFF WAV for audio files (Linear PCM or ITU-T G.711 μ-Law PCM for uncompressed audio data, and IMA-ADPCM for compressed audio data). It is not supported in JPEG 2000, PNG, or GIF."

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More on Exif at
 * http://www.exif.org
 * http://www.kodak.com/global/plugins/acrobat/en/service/digCam/exifStandard2.pdf

jhead
jhead - Exif Jpeg header manipulation tool

See jhead

Sample
Favorites:
 * Make - Canon
 * Model - Canon EOS REBEL T3i
 * Orientation - Top left
 * XResolution - 72 # dpi
 * YResolution - 72 # dpi
 * ResolutionUnit - Inch # dpi
 * ExposureTime - 1/800 seconds
 * FNumber - 3.50
 * ExposureProgram - Aperture priority
 * ISOSpeedRatings - 100
 * ShutterSpeedValue - 1/790 seconds
 * ApertureValue - F 3.51
 * FocalLength - 18 mm
 * ExposureMode - Auto
 * White Balance - Auto
 * Focal length - 18 - 55 mm (1 mm)

Orientation:
 * Top left - normal landscape (looking at front of camera, left top is up)
 * Left bottom - portrait (looking at front of camera, left bottom is up)

ExposureProgram:
 * Normal program
 * Aperture priority

Aperture priority: Filename - IMG_1073.JPG Make - Canon Model - Canon EOS REBEL T3i Orientation - Top left XResolution - 72 YResolution - 72 ResolutionUnit - Inch DateTime - 2012:10:30 13:40:31 Artist - YCbCrPositioning - Co-Sited Copyright - ExifOffset - 348 ExposureTime - 1/800 seconds FNumber - 3.50 ExposureProgram - Aperture priority ISOSpeedRatings - 100 ExifVersion - 0230 DateTimeOriginal - 2012:10:30 13:40:31 DateTimeDigitized - 2012:10:30 13:40:31 ComponentsConfiguration - YCbCr ShutterSpeedValue - 1/790 seconds ApertureValue - F 3.51 ExposureBiasValue - 0 MeteringMode - Multi-segment Flash - Flash not fired, compulsory flash mode FocalLength - 18 mm UserComment - SubsecTime - 00 SubsecTimeOriginal - 00 SubsecTimeDigitized - 00 FlashPixVersion - 0100 ColorSpace - sRGB ExifImageWidth - 3456 ExifImageHeight - 5184 InteroperabilityOffset - 8598 FocalPlaneXResolution - 5728.18 FocalPlaneYResolution - 5808.40 FocalPlaneResolutionUnit - Inch CustomRendered - Normal process ExposureMode - Auto White Balance - Auto SceneCaptureType - Standard

Maker Note (Vendor): - Macro mode - Normal Self timer - Off Quality - Fine Flash mode - Not fired Sequence mode - Single or Timer Focus mode - One-Shot Image size - Large Easy shooting mode - Manual Digital zoom - None Contrast - Normal Saturation - Normal Sharpness - Low, -32769 ISO Value - Auto Metering mode - Evaluative Focus type - Auto AF point selected - Exposure mode - Av-priority Focal length - 18 - 55 mm (1 mm) Flash activity - Not fired Flash details - Focus mode 2 - 65535 Auto ISO - 100 Base ISO - 100 White Balance - Auto Sequence number - 0 Flash bias - 0 EV Subject Distance - 0.00 Image Type - Canon EOS REBEL T3i Firmware Version - Firmware Version 1.0.2 Owner Name - Sharpness (EOS 1D) - 0 Directory index (EOS 450D) - 720 File index (EOS 450D) - 1 File number - 000 - 0000 Sharpness (A0) - 3

Thumbnail: - Compression - 6 (JPG) XResolution - 72 YResolution - 72 ResolutionUnit - Inch JpegIFOffset - 8916 JpegIFByteCount - 15568

Full Auto: Filename - IMG_1074.JPG Make - Canon Model - Canon EOS REBEL T3i Orientation - Left bottom XResolution - 72 YResolution - 72 ResolutionUnit - Inch DateTime - 2012:10:30 13:40:41 Artist - YCbCrPositioning - Co-Sited Copyright - ExifOffset - 348 ExposureTime - 1/200 seconds FNumber - 8 ExposureProgram - Normal program ISOSpeedRatings - 100 ExifVersion - 0230 DateTimeOriginal - 2012:10:30 13:40:41 DateTimeDigitized - 2012:10:30 13:40:41 ComponentsConfiguration - YCbCr ShutterSpeedValue - 1/197 seconds ApertureValue - F 8.00 ExposureBiasValue - 0 MeteringMode - Multi-segment Flash - Flash not fired, compulsory flash mode FocalLength - 18 mm UserComment - SubsecTime - 00 SubsecTimeOriginal - 00 SubsecTimeDigitized - 00 FlashPixVersion - 0100 ColorSpace - sRGB ExifImageWidth - 5184 ExifImageHeight - 3456 InteroperabilityOffset - 8598 FocalPlaneXResolution - 5728.18 FocalPlaneYResolution - 5808.40 FocalPlaneResolutionUnit - Inch CustomRendered - Normal process ExposureMode - Auto White Balance - Auto SceneCaptureType - Standard

Maker Note (Vendor): - Macro mode - Normal Self timer - Off Quality - Fine Flash mode - Not fired Sequence mode - Single or Timer Focus mode - AI Focus Image size - Large Easy shooting mode - Full Auto Digital zoom - None Contrast - Normal Saturation - Normal Sharpness - Low, -32769 ISO Value - Auto 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 Auto ISO - 100 Base ISO - 100 White Balance - Auto Sequence number - 0 Flash bias - 0 EV Subject Distance - 0.00 Image Type - Canon EOS REBEL T3i Firmware Version - Firmware Version 1.0.2 Owner Name - Sharpness (EOS 1D) - 0 Directory index (EOS 450D) - 720 File index (EOS 450D) - 1 File number - 000 - 0000 Sharpness (A0) - 3

Thumbnail: - Compression - 6 (JPG) XResolution - 72 YResolution - 72 ResolutionUnit - Inch JpegIFOffset - 8916 JpegIFByteCount - 15568