DCRP EXIF
data viewer
Glossary of Terms
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Note: EXIF data tends to vary from camera to camera. You may find something down below that's not in the EXIF headers for a certain camera. Also, there may be some things found on some cameras that is not detailed below.
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.
ColorSpace
The color space information tag (ColorSpace) is always recorded as the color
space specifier.
Normally sRGB (=1) is used to define the color space based on the PC monitor
conditions and environment. If a
color space other than sRGB is used, Uncalibrated (=FFFF.H) is set.
1 = sRGB
FFFF.H = Uncalibrated
Other = reserved
DateTimeDigitized
The date and time when the image was stored as digital data. If, fo r example,
an image was captured by DSC and at
the same time the file was recorded, then the DateTimeOriginal and DateTimeDigitized
will have the same contents.
The format is "YYYY:MM:DD HH:MM:SS" with time shown in 24-hour format,
and the date and time separated
by one blank character.
DateTimeOriginal
The date and time when the original image data was generated. For a DSC the
date and time the picture was taken
are recorded. The format is "YYYY:MM:DD HH:MM:SS" with time shown
in 24-hour format, and the date and
time separated by one blank character.
ExifImageWidth
The number of columns of image data, equal to the number of pixels per row.
ExifImageLength
The number of rows of image data.
ExposureBiasValue
The exposure bias. The unit is the APEX value. Ordinarily it is given in the
range of –99.99 to 99.99.
ExposureProgram
The class of the program used by the camera to set exposure when the picture
is taken. The tag values are as follows.
0 = Not defined
1 = Manual
2 = Normal program
3 = 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)
8 = Landscape mode (for landscape photos with the background in focus)
9 to 255 = reserved
ExposureTime
Exposure time, given in seconds (sec).
FileSize
Size of the image in bytes. To convert to kilobytes, divide by 1000.
To convert to megabytes, divide by 1000000.
Flash
This tag is recorded when an image is taken using a strobe light (flash). Bit
0 indicates the flash firing status, and
bits 1 and 2 indicate the flash return status (not shown here).
Values for bit 0 indicating whether the flash fired.
0b = Flash did not fire.
1b = Flash fired.
FNumber
The F number (familiar aperture value).
FocalLength
The actual focal length of the lens, in mm. Conversion is not made to the focal
length of a 35 mm film camera.
FocalPlaneXResolution
Indicates the number of pixels in the image width (X) direction per FocalPlaneResolutionUnit
on the camera focal
plane.
FocalPlaneYResolution
Indicates the number of pixels in the image height (Y) direction per FocalPlaneResolutionUnit
on t he camera focal
plane.
FocalPlaneResolutionUnit
Indicates the unit for measuring FocalPlaneXResolution and FocalPlaneYResolution.
This value is the same as the
ResolutionUnit.
ImageDescription
A character string giving the title of the image. It may be a comment such as
"1988 company picnic" or the like.
Two-byte character codes cannot be used. When a 2-byte code is necessary, the
Exif Private tag UserComment is to
be used.
ISOSpeedRatings
Indicates the ISO Speed and ISO Latitude of the camera or input device as specified
in ISO 12232xiv.
LightSource
The kind of light source.
0 = unknown
1 = Daylight
2 = Fluorescent
3 = Tungsten
17 = Standard light A
18 = Standard light B
19 = Standard light C
20 = D55
21 = D65
22 = D75
23 to 254 = reserved
255 = other
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.
MaxApertureValue
The smallest F number of the lens. The unit is the APEX value. Ordinarily it
is given in the range of 00.00 to 99.99,
but it is not limited to this range.
MeteringMode
The metering mode.
0 = unknown
1 = Average
2 = CenterWeightedAverage
3 = Spot
4 = MultiSpot
5 = Pattern
6 = Partial
7 to 254 = reserved
255 = other
Model
The model name or model number of the equipment. This is the model name of 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.
Orientation
The image orientation viewed in terms of rows and columns.
1 = The 0th row is at the visual top of the image, and the 0th column is the
visual left-hand side.
2 = The 0th row is at the visual top of the image, and the 0th column is the
visual right-hand side.
3 = The 0th row is at the visual bottom of the image, and the 0th column is
the visual right-hand
side.
4 = The 0th row is at the visual bottom of the image, and the 0th column is
the visual left-hand
side.
5 = The 0th row is the visual left-hand side of of the image, and the 0th column
is the visual top.
6 = The 0th row is the visual right -hand side of of the image, and the 0th
column is the visual top.
7 = The 0th row is the visual right -hand side of of the image, and the 0th
column is the visual
bottom.
8 = The 0th row is the visual left-hand side of of the image, and the 0th column
is the visual
bottom.
ResolutionUnit
The unit for measuring XResolution and YResolution. The same unit is used for
both XResolution and YResolution.
If the image resolution in unknown, 2 (inches) is designated.
2 = inches
3 = centimeters
Other = reserved
ShutterSpeedValue
Shutter speed. The unit is the APEX (Additive System of Photographic Exposure)
setting.
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.
SubjectDistance
The distance to the subject, given in meters.
XResolution
The number of pixels per ResolutionUnit in the ImageWidth direction. When the
image resolution is unknown, 72
[dpi] is designated.
YCbCrPositioning
The position of chrominance components in relation to the luminance component.
This field is designated only for
JPEG compressed data or uncompressed YCbCr data. The TIFF default is 1 (centered);
but when Y:Cb:Cr = 4:2:2 it
is recommended in this standard that 2 (co-sited) be used to record data, in
order to improve the image quality when
viewed on TV systems. When this field does not exist, the reader shall assume
the TIFF default. In the case of
Y:Cb:Cr = 4:2:0, the TIFF default (centered) is recommended. If the reader does
not have the capability of
supporting both kinds of YCbCrPositioning, it shall follow the TIFF default
regardless of the value in this field. It is
preferable that readers be able to support both centered and co- sited positioning.
1 = centered
2 = co-sited
Other = reserved
YResolution
The number of pixels per ResolutionUnit in the ImageLength direction. The same
value as XResolution is
designated.