TIFF Tag Reference, Exif Tags
Exif tags are used largely to encode additional information related to image generation by digital still cameras. Exif is the abbreviation of 'Exchangeable image file format', though this can be argued to be a misnomer, as Exif does not relate to TIFF like e.g. JFIF relates to JPEG.
The Exif IFD is pointed to by the Exif IFD tag.
There are actually three private IFDs specified by the Exif standard. The other two are the GPS IFD and the Interoperability IFD. For the Exif specification and other related information, see Exif.org.
Code | Name | Short description | |
---|---|---|---|
Dec | Hex | ||
33434 | 829A | ExposureTime | Exposure time, given in seconds. |
33437 | 829D | FNumber | The F number. |
34850 | 8822 | ExposureProgram | The class of the program used by the camera to set exposure when the picture is taken. |
34852 | 8824 | SpectralSensitivity | Indicates the spectral sensitivity of each channel of the camera used. |
34855 | 8827 | ISOSpeedRatings | Indicates the ISO Speed and ISO Latitude of the camera or input device as specified in ISO 12232. |
34856 | 8828 | OECF | Indicates the Opto-Electric Conversion Function (OECF) specified in ISO 14524. |
36864 | 9000 | ExifVersion | The version of the supported Exif standard. |
36867 | 9003 | DateTimeOriginal | The date and time when the original image data was generated. |
36868 | 9004 | DateTimeDigitized | The date and time when the image was stored as digital data. |
37121 | 9101 | ComponentsConfiguration | Specific to compressed data; specifies the channels and complements PhotometricInterpretation |
37122 | 9102 | CompressedBitsPerPixel | Specific to compressed data; states the compressed bits per pixel. |
37377 | 9201 | ShutterSpeedValue | Shutter speed. |
37378 | 9202 | ApertureValue | The lens aperture. |
37379 | 9203 | BrightnessValue | The value of brightness. |
37380 | 9204 | ExposureBiasValue | The exposure bias. |
37381 | 9205 | MaxApertureValue | The smallest F number of the lens. |
37382 | 9206 | SubjectDistance | The distance to the subject, given in meters. |
37383 | 9207 | MeteringMode | The metering mode. |
37384 | 9208 | LightSource | The kind of light source. |
37385 | 9209 | Flash | Indicates the status of flash when the image was shot. |
37386 | 920A | FocalLength | The actual focal length of the lens, in mm. |
37396 | 9214 | SubjectArea | Indicates the location and area of the main subject in the overall scene. |
37500 | 927C | MakerNote | Manufacturer specific information. |
37510 | 9286 | UserComment | Keywords or comments on the image; complements ImageDescription. |
37520 | 9290 | SubsecTime | A tag used to record fractions of seconds for the DateTime tag. |
37521 | 9291 | SubsecTimeOriginal | A tag used to record fractions of seconds for the DateTimeOriginal tag. |
37522 | 9292 | SubsecTimeDigitized | A tag used to record fractions of seconds for the DateTimeDigitized tag. |
40960 | A000 | FlashpixVersion | The Flashpix format version supported by a FPXR file. |
40961 | A001 | ColorSpace | The color space information tag is always recorded as the color space specifier. |
40962 | A002 | PixelXDimension | Specific to compressed data; the valid width of the meaningful image. |
40963 | A003 | PixelYDimension | Specific to compressed data; the valid height of the meaningful image. |
40964 | A004 | RelatedSoundFile | Used to record the name of an audio file related to the image data. |
41483 | A20B | FlashEnergy | Indicates the strobe energy at the time the image is captured, as measured in Beam Candle Power Seconds |
41484 | A20C | SpatialFrequencyResponse | Records the camera or input device spatial frequency table and SFR values in the direction of image width, image height, and diagonal direction, as specified in ISO 12233. |
41486 | A20E | FocalPlaneXResolution | Indicates the number of pixels in the image width (X) direction per FocalPlaneResolutionUnit on the camera focal plane. |
41487 | A20F | FocalPlaneYResolution | Indicates the number of pixels in the image height (Y) direction per FocalPlaneResolutionUnit on the camera focal plane. |
41488 | A210 | FocalPlaneResolutionUnit | Indicates the unit for measuring FocalPlaneXResolution and FocalPlaneYResolution. |
41492 | A214 | SubjectLocation | Indicates the location of the main subject in the scene. |
41493 | A215 | ExposureIndex | Indicates the exposure index selected on the camera or input device at the time the image is captured. |
41495 | A217 | SensingMethod | Indicates the image sensor type on the camera or input device. |
41728 | A300 | FileSource | Indicates the image source. |
41729 | A301 | SceneType | Indicates the type of scene. |
41730 | A302 | CFAPattern | Indicates the color filter array (CFA) geometric pattern of the image sensor when a one-chip color area sensor is used. |
41985 | A401 | CustomRendered | Indicates the use of special processing on image data, such as rendering geared to output. |
41986 | A402 | ExposureMode | Indicates the exposure mode set when the image was shot. |
41987 | A403 | WhiteBalance | Indicates the white balance mode set when the image was shot. |
41988 | A404 | DigitalZoomRatio | Indicates the digital zoom ratio when the image was shot. |
41989 | A405 | FocalLengthIn35mmFilm | Indicates the equivalent focal length assuming a 35mm film camera, in mm. |
41990 | A406 | SceneCaptureType | Indicates the type of scene that was shot. |
41991 | A407 | GainControl | Indicates the degree of overall image gain adjustment. |
41992 | A408 | Contrast | Indicates the direction of contrast processing applied by the camera when the image was shot. |
41993 | A409 | Saturation | Indicates the direction of saturation processing applied by the camera when the image was shot. |
41994 | A40A | Sharpness | Indicates the direction of sharpness processing applied by the camera when the image was shot. |
41995 | A40B | DeviceSettingDescription | This tag indicates information on the picture-taking conditions of a particular camera model. |
41996 | A40C | SubjectDistanceRange | Indicates the distance to the subject. |
42016 | A420 | ImageUniqueID | Indicates an identifier assigned uniquely to each image. |