Index

About EXIF data

Descriptions taken from libexif

Make The manufacturer of the recording equipment. This is the manufacturer of the DSC, scanner, video digitizer or other equipment that generated the image. When the field is left blank, it is treated as unknown.
Model The model name or model number of the equipment. This is the model name or number of the DSC, scanner, video digitizer or other equipment that generated the image. When the field is left blank, it is treated as unknown.
Software This tag records the name and version of the software or firmware of the camera or image input device used to generate the image. The detailed format is not specified, but it is recommended that the example shown below be followed. When the field is left blank, it is treated as unknown.
DateTime The date and time of image creation. In this standard (EXIF-2.1) it is the date and time the file was changed.
DateTimeOriginal The date and time when the original image data was generated. For a digital still camera the date and time the picture was taken are recorded.
DateTimeDigitized The date and time when the image was stored as digital data.
Flash This tag is recorded when an image is taken using a strobe light (flash).
FlashEnergy Indicates the strobe energy at the time the image is captured, as measured in Beam Candle Power Seconds (BCPS).
ExposureTime Exposure time, given in seconds (sec).
FNumber The F number.
Orientation The image orientation viewed in terms of rows and colums.
WhitePoint The chromaticity of the white point of the image. Normally this tag is not necessary, since color space is specified in the colorspace information tag ().
SpectralSensitivity Indicates the spectral sensitivity of each channel of the camera used. The tag value is an ASCII string compatible with the standard developed by the ASTM Technical committee.
ISOSpeedRatings Indicates the ISO Speed and ISO Latitude of the camera or input device as specified in ISO 12232.
ShutterSpeedValue Shutter speed. The unit is the APEX (Additive System of Photographic Exposure) setting (see Appendix C).
WhiteBalance This tag indicates the white balance mode set when the image was shot.
ExposureIndex Indicates the exposure index selected on the camera or input device at the time the image is captured.
ExposureMode This tag indicates the exposure mode set when the image was shot. In auto-bracketing mode, the camera shoots a series of frames of the same scene at different exposure settings.
ExposureProgram The class of the program used by the camera to set exposure when the picture is taken.
ExposureBiasValue The exposure bias. The units is the APEX value. Ordinarily it is given in the range of -99.99 to 99.99.
SceneType Indicates the type of scene. If a DSC recorded the image, this tag value must always be set to 1, indicating that the image was directly photographed.
SceneCaptureType This tag indicates the type of scene that was shot. It can also be used to record the mode in which the image was shot. Note that this differs from the scene type (SceneType) tag.
SensingMethod Indicates the image sensor type on the camera or input device.
LightSource The kind of light source.
ApertureValue The lens aperture. The unit is the APEX value.
BrightnessValue The value of brightness. The unit is the APEX value. Ordinarily it is given in the range of -99.99 to 99.99.
MeteringMode The metering mode.
SubjectArea This tag indicates the location and area of the main subject in the overall scene.
SubjectLocation Indicates the location of the main subject in the scene. The value of this tag represents the pixel at the center of the main subject relative to the left edge, prior to rotation processing as per the tag. The first value indicates the X column number and second indicates the Y row number.
SubjectDistance The distance to the subject, given in meters.
SubjectDistanceRange This tag indicates the distance to the subject.
CustomRendered This tag indicates the use of special processing on image data, such as rendering geared to output. When special processing is performed, the reader is expected to disable or minimize any further processing.
GainControl This tag indicates the degree of overall image gain adjustment.
Contrast This tag indicates the direction of contrast processing applied by the camera when the image was shot.
Saturation This tag indicates the direction of saturation processing applied by the camera when the image was shot.
Sharpness This tag indicates the direction of sharpness processing applied by the camera when the image was shot.
DeviceSettingDescription This tag indicates information on the picture-taking conditions of a particular camera model. The tag is used only to indicate the picture-taking conditions in the reader.
DigitalZoomRatio This tag indicates the digital zoom ratio when the image was shot. If the numerator of the recorded value is 0, this indicates that digital zoom was not used.
FocalLength The actual focal length of the lens, in mm. Conversion is not made to the focal length of a 35 mm film camera.
FocalLengthIn35mmFilm This tag indicates the equivalent focal length assuming a 35mm film camera, in mm. A value of 0 means the focal length is unknown. Note that this tag differs from the FocalLength tag.

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