This tag records the name of the camera owner, photographer or image creator.
The detailed format is not specified, but it is recommended that the information be written
as in the example below for ease of Interoperability. When the field is left blank, it is
treated as unknown.
The number of bits per image component. In this standard each component of the image is
8 bits, so the value for this tag is 8. In JPEG compressed data, this tag shall not be
used because a JPEG marker is used instead of it
The value of brightness. The unit is the APEX value. Ordinarily it is given in the range
of -99.99 to 99.99. Note that if the numerator of the recorded value is 0xFFFFFFFF,
Unknown shall be indicated.
Indicates the color filter array (CFA) geometric pattern of the image sensor when
a one-chip color area sensor is used. It does not apply to all sensing methods.
The color space information tag is always recorded as the color space specifier.
Normally {@link #COLOR_SPACE_S_RGB} is used to define the color space based on the PC
monitor conditions and environment. If a color space other than {@link #COLOR_SPACE_S_RGB}
is used, {@link #COLOR_SPACE_UNCALIBRATED} is set. Image data recorded as
{@link #COLOR_SPACE_UNCALIBRATED} may be treated as {@link #COLOR_SPACE_S_RGB} when it is
converted to Flashpix
Information specific to compressed data. The channels of each component are arranged
in order from the 1st component to the 4th. For uncompressed data the data arrangement is
given in the {@link #TAG_PHOTOMETRIC_INTERPRETATION}. However, since
{@link #TAG_PHOTOMETRIC_INTERPRETATION} can only express the order of Y, Cb and Cr, this tag
is provided for cases when compressed data uses components other than Y, Cb, and Cr and to
enable support of other sequences.
The compression scheme used for the image data. When a primary image is JPEG compressed,
this designation is not necessary. So, this tag shall not be recorded. When thumbnails use
JPEG compression, this tag value is set to 6.
Copyright information. In this standard the tag is used to indicate both the photographer
and editor copyrights. It is the copyright notice of the person or organization claiming
rights to the image. The Interoperability copyright statement including date and rights
should be written in this field; e.g., "Copyright, John Smith, 19xx. All rights reserved."
In this standard the field records both the photographer and editor copyrights, with each
recorded in a separate part of the statement. When there is a clear distinction between
the photographer and editor copyrights, these are to be written in the order of photographer
followed by editor copyright, separated by NULL (in this case, since the statement also ends
with a NULL, there are two NULL codes) (see example 1). When only the photographer copyright
is given, it is terminated by one NULL code (see example 2). When only the editor copyright
is given, the photographer copyright part consists of one space followed by a terminating
NULL code, then the editor copyright is given (see example 3). When the field is left blank,
it is treated as unknown.
This tag indicates the use of special processing on image data, such as rendering geared
to output. When special processing is performed, the Exif/DCF reader is expected to disable
or minimize any further processing.
The date and time of image creation. In this standard it is the date and time the file
was changed. 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 ({@code 0x20}). When the date and time
are unknown, all the character spaces except colons (":") should be filled with blank
characters, or else the Interoperability field should be filled with blank characters.
The character string length is 20 Bytes including NULL for termination. When the field is
left blank, it is treated as unknown.
The date and time when the image was stored as digital data. If, for example, an image
was captured by DSC and at the same time the file was recorded, then
{@link #TAG_DATETIME_ORIGINAL} and this tag 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 ({@code 0x20}). When the date and time are unknown, all the character
spaces except colons (":")should be filled with blank characters, or else
the Interoperability field should be filled with blank characters. When the field is left
blank, it is treated as unknown.
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 ({@code 0x20}).
When the date and time are unknown, all the character spaces except colons (":") should be
filled with blank characters, or else the Interoperability field should be filled with blank
characters. When the field is left blank, it is treated as unknown.
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 Exif/DCF
reader.
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.
The version of this standard supported. Nonexistence of this field is taken to mean
nonconformance to the standard. In according with conformance to this standard, this tag
shall be recorded like "0230” as 4-byte ASCII.
This tag indicates the exposure mode set when the image was shot.
In {@link #EXPOSURE_MODE_AUTO_BRACKET}, the camera shoots a series of frames of the same
scene at different exposure settings.
This tag indicates the status of flash when the image was shot. Bit 0 indicates the flash
firing status, bits 1 and 2 indicate the flash return status, bits 3 and 4 indicate
the flash mode, bit 5 indicates whether the flash function is present, and bit 6 indicates
"red eye" mode.
The Flashpix format version supported by a FPXR file. If the FPXR function supports
Flashpix format Ver. 1.0, this is indicated similarly to {@link #TAG_EXIF_VERSION} by
recording "0100" as 4-byte ASCII.
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
{@link #TAG_FOCAL_LENGTH}.
Indicates the unit for measuring {@link #TAG_FOCAL_PLANE_X_RESOLUTION} and
{@link #TAG_FOCAL_PLANE_Y_RESOLUTION}. This value is the same as
{@link #TAG_RESOLUTION_UNIT}.
An ASCII string giving the title of the image. It is possible to be added a comment
such as "1988 company picnic" or the like. Two-byte character codes cannot be used. When
a 2-byte code is necessary, {@link #TAG_USER_COMMENT} is to be used.
This tag indicates an identifier assigned uniquely to each image. It is recorded as
an ASCII string equivalent to hexadecimal notation and 128-bit fixed length.
The number of columns of image data, equal to the number of pixels per row. In JPEG
compressed data, this tag shall not be used because a JPEG marker is used instead of it
This tag indicates the ISO speed value of a camera or input device that is defined in
ISO 12232. When recording this tag, {@link #TAG_PHOTOGRAPHIC_SENSITIVITY} and
{@link #TAG_SENSITIVITY_TYPE} shall also be recorded.
This tag indicates the ISO speed latitude yyy value of a camera or input device that is
defined in ISO 12232. However, this tag shall not be recorded without {@link #TAG_ISO_SPEED}
and {@link #TAG_ISO_SPEED_LATITUDE_ZZZ}.
This tag indicates the ISO speed latitude zzz value of a camera or input device that is
defined in ISO 12232. However, this tag shall not be recorded without {@link #TAG_ISO_SPEED}
and {@link #TAG_ISO_SPEED_LATITUDE_YYY}.
The number of bytes of JPEG compressed thumbnail data. This is not used for primary image
JPEG data. JPEG thumbnails are not divided but are recorded as a continuous JPEG bitstream
from SOI to EOI. APPn and COM markers should not be recorded. Compressed thumbnails shall be
recorded in no more than 64 KBytes, including all other data to be recorded in APP1.
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.
Indicates the Opto-Electric Conversion Function (OECF) specified in ISO 14524. OECF is
the relationship between the camera optical input and the image values.
This tag indicates the sensitivity of the camera or input device when the image was shot.
More specifically, it indicates one of the following values that are parameters defined in
ISO 12232: standard output sensitivity (SOS), recommended exposure index (REI), or ISO
speed. Accordingly, if a tag corresponding to a parameter that is designated by
{@link #TAG_SENSITIVITY_TYPE} is recorded, the values of the tag and of this tag are
the same. However, if the value is 65535 or higher, the value of this tag shall be 65535.
When recording this tag, {@link #TAG_SENSITIVITY_TYPE} should also be recorded. In addition,
while “Count = Any”, only 1 count should be used when recording this tag.
Information specific to compressed data. When a compressed file is recorded, the valid
width of the meaningful image shall be recorded in this tag, whether or not there is padding
data or a restart marker. This tag shall not exist in an uncompressed file.
Information specific to compressed data. When a compressed file is recorded, the valid
height of the meaningful image shall be recorded in this tag, whether or not there is
padding data or a restart marker. This tag shall not exist in an uncompressed file.
Since data padding is unnecessary in the vertical direction, the number of lines recorded
in this valid image height tag will in fact be the same as that recorded in the SOF.
Indicates whether pixel components are recorded in chunky or planar format. In JPEG
compressed data, this tag shall not be used because a JPEG marker is used instead of it.
If this field does not exist, the TIFF default, {@link #FORMAT_CHUNKY}, is assumed.
The chromaticity of the three primary colors of the image. Normally this tag need not
be used, since color space is specified in {@link #TAG_COLOR_SPACE}.
This tag indicates the recommended exposure index value of a camera or input device
defined in ISO 12232. When recording this tag, {@link #TAG_PHOTOGRAPHIC_SENSITIVITY} and
{@link #TAG_SENSITIVITY_TYPE} shall also be recorded.
The reference black point value and reference white point value. No defaults are given
in TIFF, but the values below are given as defaults here. The color space is declared in
a color space information tag, with the default being the value that gives the optimal image
characteristics Interoperability these conditions
This tag is used to record the name of an audio file related to the image data. The only
relational information recorded here is the Exif audio file name and extension (an ASCII
string consisting of 8 characters + '.' + 3 characters). The path is not recorded.
The unit for measuring {@link #TAG_X_RESOLUTION} and {@link #TAG_Y_RESOLUTION}. The same
unit is used for both {@link #TAG_X_RESOLUTION} and {@link #TAG_Y_RESOLUTION}. If the image
resolution is unknown, {@link #RESOLUTION_UNIT_INCHES} shall be designated.
The number of rows per strip. This is the number of rows in the image of one strip when
an image is divided into strips. In the case of JPEG compressed data, this designation is
not necessary. So, this tag shall not be recorded.
The number of components per pixel. Since this standard applies to RGB and YCbCr images,
the value set for this tag is 3. In JPEG compressed data, this tag shall not be used because
a JPEG marker is used instead of it.
This tag indicates the type of scene that was shot. It may also be used to record
the mode in which the image was shot. Note that this differs from
{@link #TAG_SCENE_TYPE}.
This tag indicates which one of the parameters of ISO12232 is
{@link #TAG_PHOTOGRAPHIC_SENSITIVITY}. Although it is an optional tag, it should be recorded
when {@link #TAG_PHOTOGRAPHIC_SENSITIVITY} is recorded.
This tag 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.
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.
This tag indicates the standard output sensitivity value of a camera or input device
defined in ISO 12232. When recording this tag, {@link #TAG_PHOTOGRAPHIC_SENSITIVITY} and
{@link #TAG_SENSITIVITY_TYPE} shall also be recorded.
For each strip, the byte offset of that strip. It is recommended that this be selected
so the number of strip bytes does not exceed 64 KBytes.In the case of JPEG compressed data,
this designation is not necessary. So, this tag shall not be recorded.
The distance to the subject, given in meters. Note that if the numerator of the recorded
value is 0xFFFFFFFF, Infinity shall be indicated; and if the numerator is 0, Distance
unknown shall be indicated.
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 {@link #TAG_ORIENTATION}. The first value indicates the X column number
and second indicates the Y row number. When a camera records the main subject location,
it is recommended that {@link #TAG_SUBJECT_AREA} be used instead of this tag.
A transfer function for the image, described in tabular style. Normally this tag need not
be used, since color space is specified in {@link #TAG_COLOR_SPACE}.
A tag for Exif users to write keywords or comments on the image besides those in
{@link #TAG_IMAGE_DESCRIPTION}, and without the character code limitations of it.
The number of pixels per {@link #TAG_RESOLUTION_UNIT} in the {@link #TAG_IMAGE_WIDTH}
direction. When the image resolution is unknown, 72 dpi shall be designated.
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
{@link #Y_CB_CR_POSITIONING_CENTERED}; but when Y:Cb:Cr = 4:2:2 it is recommended in this
standard that {@link #Y_CB_CR_POSITIONING_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
({@link #Y_CB_CR_POSITIONING_CENTERED}) is recommended. If the Exif/DCF reader does not
have the capability of supporting both kinds of positioning, it shall follow the TIFF
default regardless of the value in this field. It is preferable that readers can support
both centered and co-sited positioning.
The sampling ratio of chrominance components in relation to the luminance component.
In JPEG compressed data a JPEG marker is used instead of this tag. So, this tag shall not
be recorded.
The number of pixels per {@link #TAG_RESOLUTION_UNIT} in the {@link #TAG_IMAGE_WIDTH}
direction. The same value as {@link #TAG_X_RESOLUTION} shall be designated.
