Exif File Comments (original) (raw)
RasterCommentMetadataType.ExifVersion
Exif version. LEADTOOLS always writes this value as 0110, meaning version 1.1. Data type: RasterCommentMetadataDataType.Byte. Length: 4.
RasterCommentMetadataType.SubsecTime
Decimal extension for seconds that are specified in the .DateTime field. Data type: RasterCommentMetadataDataType.Ascii. Length: variable.
RasterCommentMetadataType.DateTimeOriginal
Date and time the original image is captured. The format is YYYY:MM:DD HH:MM:SS. The time is in a 24-hour format, and a blank space is left between the date and the time. Data type:
RasterCommentMetadataDataType.Ascii. Length: 20.
RasterCommentMetadataType.SubsecTimeOriginal
Decimal extension for seconds that are specified in the RasterCommentMetadataType.DateTimeOriginal field. Data type: RasterCommentMetadataDataType.Ascii. Length:
variable.
RasterCommentMetadataType.DateTimeDigitized
Date and time the file is generated. If the file is generated directly, as with a digital camera, this is the same as the time the original image is captured. Data type: RasterCommentMetadataDataType.Ascii.
Length: 20.
RasterCommentMetadataType.SubsecTimeDigitized
Decimal extension for seconds that are specified in the RasterCommentMetadataType.DateTimeDigitized field. Data type: RasterCommentMetadataDataType.Ascii. Length:
variable.
RasterCommentMetadataType.ShutterSpeedValue
Shutter speed. The unit of measure is APEX. Data type: RasterCommentMetadataDataType.Rational. Length: 1.
RasterCommentMetadataType.Aperture
Aperture value. This is the ratio of lens aperture for the focal length. The unit of measure is APEX. Data type: RasterCommentMetadataDataType.URational. Length: 1.
RasterCommentMetadataType.Brightness
Brightness value. Data type: RasterCommentMetadataDataType.Rational. Length: 1.
RasterCommentMetadataType.ExposureBias
Exposure bias. This is the value for correcting a biased exposure. The unit of measure is APEX. Data type: RasterCommentMetadataDataType.Rational. Length: 1.
RasterCommentMetadataType.MaxAperture
Minimum lens f-number. Data type: RasterCommentMetadataDataType.URational. Length: 1.
RasterCommentMetadataType.SubjectDistance
Distance from lens to subject (in meters). Data type: RasterCommentMetadataDataType.URational. Length: 1.
RasterCommentMetadataType.MeteringMode
Photometry mode. Possible values are:
0 = Unidentified
1 = Average
2 = Center Weighted Average
3 = Spot
4 = MultiSpot
5 = Pattern
6 = Partial
255 = Others
Data type: RasterCommentMetadataDataType.Short. Length: 1.
RasterCommentMetadataType.LightSource
Light source. Possible values are:
0 = Unidentified
1 = Daylight
2 = Florescence light
3 = Tungsten Lamp
17 = Standard light source A
18 = Standard light source B
19 = Standard light source C
20 = D55
21 = D65
22 = D75
255 = Others
Data type: RasterCommentMetadataDataType.Short. Length: 1.
RasterCommentMetadataType.Flash
Flash On/Off. Possible values are 1 for on or 0 for off. Data type: RasterCommentMetadataDataType.Short. Length: 1.
RasterCommentMetadataType.FocalLength
Focal length, measured in millimeters. Data type: RasterCommentMetadataDataType.URational. Length: 1.
RasterCommentMetadataType.ExposureTime
Exposure time, expressed as a fraction of a second. Data type: RasterCommentMetadataDataType.Length: 1.
RasterCommentMetadataType.FNumber
The actual lens F stop (ratio of lens aperture to focal length). Data type: RasterCommentMetadataDataType.URational. Length: 1.
RasterCommentMetadataType.MakerNote
Maker note. Data type: RasterCommentMetadataDataType.Byte. The creator of the file determines the data format.
RasterCommentMetadataType.UserComment
User comment. Data type: RasterCommentMetadataDataType.Byte. Length: variable. The first eight bytes specify the data format, and the remainder of the comment is in the specified format. The first eight
bytes can be any of the following:
41 53 43 49 49 00 00 00 = ASCII
4A 49 53 00 00 00 00 00 = JIS (Japanese)
00 00 00 00 00 00 00 00 = Undefined
RasterCommentMetadataType.SupportedFlashPixVersion
Supported FlashPix version (Exif 2.0). LEADTOOLS always writes 0100 here. Data type: RasterCommentMetadataDataType.Byte. Length: 4
RasterCommentMetadataType.ColorSpace
Color space (Exif 2.0). Specifies whether the color is calibrated or not. LEADTOOLS always writes this value as 1. Data type: RasterCommentMetadataDataType.Short. Length: 1 Possible values are:
1 = sRGB (PC monitor conditions)
0xFFFF = Uncalibrated
Other = reserved
RasterCommentMetadataType.ExposureProgram
Exposure program (Exif 2.0) The class of the program used by the camera to set exposure when the picture is taken. Data type: SHORT. Length = 1. Possible values are:
0 = Not defined
1 = Manual
2 = Aperture priority
4 = Shutter priority
5 = Creative program (biased toward depth of field)
6 = Action program (biased toward fast shutter speed)
7 = Portrait mode (for closeup photos with the background out of focus)
Other = reserved
RasterCommentMetadataType.SpectralSensitivity
Spectral sensitivity (Exif) - The spectral sensitivity of each channel of the camera used. It is an ASCII string compatible with the standard developed by the ASTM technical committee. Data type:
RasterCommentMetadataDataType.Ascii. Length: any
RasterCommentMetadataType.IsoSpeedRatings
ISO speed ratings (Exif) - the ISO speed and the ISO Latitude of the camera or input device as specified in ISO 12232 Data type: RasterCommentMetadataDataType.Short. Length: 1
RasterCommentMetadataType.OptoelectricCoefficient
Optoelectric coefficient (Exif) - Opto-Electric Conversion function specified in ISO 14524. OECF is the relationship between the camera optical input and the image values. Data type:
RasterCommentMetadataDataType.Byte. Length: ANY. This is an array of m rows and n columns.
RasterCommentMetadataType.RelatedSoundFile
Related audio file (Exif) - the name of an audio file related to the image data. The name should be 8 ASCII chars + '.' + 3 chars for extension + NULL. Data type: RasterCommentMetadataDataType.Ascii.
Length: 13.
RasterCommentMetadataType.FlashEnergy
Flash energy (Exif) - the strobe energy at the time the image is captured, as measured in Beam Candle Power Seconds (BPCS) Data type: RasterCommentMetadataDataType.URational. Length: 1
RasterCommentMetadataType.SpatialFrequencyResponse
Spatial frequency response (Exif) - 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. Data type:
RasterCommentMetadataDataType.Byte. Length: ANY This is an array of m rows and n columns.
RasterCommentMetadataType.FocalPlaneXResolution
Focal plane X Resolution (Exif) - the number of dots per resolution unit on the camera focal plane in the image width (X) direction. The resolution unit is given by
RasterCommentMetadataType.FocalPlaneResolutionUnit. If RasterCommentMetadataType.FocalPlaneResolutionUnit is not set, the unit will be considered to be 2 ("dots per inch").
Data type: RasterCommentMetadataDataType.URational. Length: 1
RasterCommentMetadataType.FocalPlaneYResolution
Focal plane Y Resolution (Exif) - the number of dots per resolution unit on the camera focal plane in the image width (Y) direction. The resolution unit is given by
RasterCommentMetadataType.FocalPlaneResolutionUnit. If RasterCommentMetadataType.FocalPlaneResolutionUnit is not set, the unit will be considered to be 2 ("dots per inch").
Data type: RasterCommentMetadataDataType.URational. Length: 1
RasterCommentMetadataType.FocalPlaneResolutionUnit
Focal plane resolution unit (Exif). This is the resolution unit for the RasterCommentMetadataType.FocalPlaneXResolution and
RasterCommentMetadataType.FocalPlaneYResolution
comments. Data type: RasterCommentMetadataDataType.Short. Length: 1. Possible values are:
2 = inch (RasterCommentMetadataType.FocalPlaneXResolution and RasterCommentMetadataType.FocalPlaneYResolution are expressed in dots per inch).
3 = cm (RasterCommentMetadataType.FocalPlaneXResolution and RasterCommentMetadataType.FocalPlaneYResolution are expressed in dots per cm).
RasterCommentMetadataType.SubjectLocation
Subject location (Exif) - the location of the main subject in the scene. The first value is the X column number and the second is the Y row number. Data type: SHORT. Length: 2
RasterCommentMetadataType.ExposureIndex
Exposure index (Exif) - the image sensor type on the camera or input device. Data type: SHORT. Length: 1
RasterCommentMetadataType.SensingMethod
Sensing method (Exif) - the image sensor type on the camera or input device. Data type: SHORT. Length: 1 Possible values are:
1 = not defined
2 = one-chip color area sensor
3 = two-chip color area sensor
4 = three-chip color area sensor
5 = color sequential area sensor
7 = trilinear sensor
8 = color sequential sensor
other = reserved
RasterCommentMetadataType.FileSource
File source (Exif) - the image source. If a digital camera recorded the image, the value will always be 3, to indicate that the image was recorded on a digital camera. Data type: SHORT. Length: 1 Possible values are:
3 = image recorded on a DSC (Digital Still Camera)
other = reserved
RasterCommentMetadataType.SceneType
Scene type (Exif) - the type of scene. If a DSC recorded the image, this value will always be 1, indicating that the image was directly photographed. Data type: RasterCommentMetadataDataType.Byte. Length: 1
Possible values are:
1 = a directly photographed image
other = reserved
RasterCommentMetadataType.CfaPattern
CFA Pattern (Exif) - the color filter array (CFA) geometric pattern of the image sensor when a one-chip color sensor was applied. It does not apply to any other sensing methods. Data type:
RasterCommentMetadataDataType.Byte. Length: ANY This is an array m x n (horz x vertical), where the pattern is repeated every m pixels on the horizontal and n pixels on the vertical.
RasterCommentMetadataType.SubjectArea
Location and area of the main subject in the overall scene. Data type: SHORT. Count: 2 (Location of the subject is given in X, Y coordinates), 3 (Area of the main subject is given as a circle, X, Y, D, where X and Y are the center coordinates and
D is the diameter.) and 4 (Area of the main subject is given as a rectangle, X, Y, W, H, where X and Y are the center coordinates, W is the width or the rectangle and H is the height of the rectangle.).
RasterCommentMetadataType.CustomRendered
Use of special processing on image data, such as rendering geared toward output. When special processing is performed, the reader is expected to disable or minimize any further processing. Data type: SHORT; Count: 1; Possible Values: 0 ( Normal
process), 1 (Custom process), Other (Reserved). Default: 0;
RasterCommentMetadataType.ExposureMode
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. Tag: 41986; Data type: SHORT; Count: 1; Possible values are: 0 (Auto exposure), 1 (Manual
exposure), 2 (Auto-bracket), Other (Reserved); Default: none.
RasterCommentMetadataType.WhiteBalance
White balance mode set when the image was shot. Data type: SHORT; Count: 1; Possible values are: 0 (Auto white balance), 1 (Manual white balance), Other (Reserved); Default: none.
RasterCommentMetadataType.DigitalZoomRatio
Digital zoom ratio set when the image was shot. If the numerator of the recorded value is 0, the digital zoom was not used. Data type: RasterCommentMetadataDataType.URational; Count: 1; Default: none.
RasterCommentMetadataType.FocalLengthin35MmFilm
Equivalent focal length, assuming a 35mm film camera, in mm. A value of 0 means the focal length is unknown. Note that this comment is different from the RasterCommentMetadataType.FocalLength comment. Data
type: SHORT; Count: 1; Default: none.
RasterCommentMetadataType.SceneCaptureType
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 RasterCommentMetadataType.SceneType comment. Data type: SHORT; Count: 1; Possible
values are: 0 (Standard), 1 (Landscape), 2 (Portrait), 3 (Night scene), Other (Reserved); Default: 0.
RasterCommentMetadataType.GainControl
Degree of overall image gain adjustment. Data type: SHORT; Count: 1; Possible values are: 0 (None), 1 (Low gain up), 2 (High gain up), 3 (Low gain down), 4 (High gain down), Other (Reserved); Default: none.
RasterCommentMetadataType.Contrast
Direction of contrast processing applied by the camera when the image was shot. Data type: SHORT; Count: 1; Possible values are: 0 ( Normal), 1 (Soft), 2 (Hard), Other (Reserved); Default: 0.
RasterCommentMetadataType.Saturation
Direction of saturation processing applied by the camera when the image was shot. Data type: SHORT; Count: 1; Possible values are: 0 ( Normal), 1 (Low saturation), 2 (High saturation), Other (Reserved); Default: 0.
RasterCommentMetadataType.Sharpness
Direction of sharpness processing applied by the camera when the image was shot. Data type: SHORT; Count: 1; Possible values are: 0 ( Normal), 1 (Soft), 2 (Hard), Other (Reserved); Default: 0.
RasterCommentMetadataType.DeviceSettingDescription
Information on the picture-taking conditions of a particular camera model. Used only to indicate the picture-taking conditions in the reader. Data type: RasterCommentMetadataDataType.Byte; Count: Any; The
data is recorded in Unicode using SHORT for the number of display rows and columns and RasterCommentMetadataDataType.Byte for the camera settings. The Unicode (UCS -2) string including Signature is NULL
terminated. The specifics of the Unicode string are as given in ISO/IEC 10464-1. Default: none.
RasterCommentMetadataType.SubjectDistanceRange
Distance to the subject. Data type: SHORT; Count: 1; Possible values are: 0 (Unknown), 1 (Macro), 2 (Close view), 3 (Distant view), Other (Reserved); Default: none.
RasterCommentMetadataType.ImageUniqueId
Identifier assigned uniquely to each image. It is recorded as an ASCII string equivalent to hexadecimal notation and 128-bit fixed length. Tag: 42016; Data type: RasterCommentMetadataDataType.Ascii; Count:
33; Default: none
RasterCommentMetadataType.Gamma
Indicates the value of coefficient gamma. The formula of transfer function used for image reproduction is expressed as follows:\
(Reproduced value) = (Input value) \^ (gamma).\
(The Reproduced and Input values are normalized to be between 0 and 1). The gamma must be positive. Tag: 42240; Data Type: RasterCommentMetadataDataType.Rational; Count: 1; Default: none.