JPEG (Joint Photographic Experts Group) Feature Representation

JPEG features specify a matrix of x, y, and z coordinates. For each raster, there will only be a single feature returned.

Attribute Name

Contents

jpeg_type

This will always be jpeg_raster.

In addition to the generic FME feature attributes that FME Workbench adds to all features (see About Feature Type Attributes), this format also adds format-specific attributes (Format Attributes).

Attribute Name

Description

jpeg_compression_level

Sets the quality of the compression.

Range: 0 (best quality) to 100 (worst quality)

Default: 28

This is a writer attribute.

jpeg_exif_aperturevalue

Represents the lens aperture.

The unit is the APEX value.

jpeg_exif_cfapattern

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.

jpeg_exif_colorspace

Represents the color space information tag is always recorded as the color space specifier.

sRGB (=1) is usually 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) is set. Image data recorded as uncalibrated can be treated as sRGB when it is converted to Flashpix.

Value:

1 – sRGB

FFFF – uncalibrated

Other – reserved

jpeg_exif_componentsconfiguration

Represents 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 photometric interpretation tag. However, since 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.

Value:

0 – does not exist

1 – Y

2 – Cb

3 – Cr

4 – R

5 – G

6 – B

Other – reserved

The default is 4 5 6 0 (if RGB uncompressed) or 1 2 3 0 (other cases).

jpeg_exif_compressedbitsperpixel

Represents information specific to compressed data. The compression mode used for a compressed image is indicated in unit bits per pixel.

jpeg_exif_contrast

Indicates the direction of contrast processing applied by the camera when the image was shot.

Value:

0 – Normal

1 – Soft

2 – Hard

jpeg_exif_customrendered

Represents 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.

Value:

0 – normal process

1 – custom process

Other – reserved

Default: 0

jpeg_exif_datetime

Represents 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.

When the date and time are unknown, all the character spaces except colons (“:”) may be filled with blank characters, or else the interoperability field may be filled with blank characters. The character's string length is 20 bytes including a null character for termination.

When the field is left blank, it is treated as unknown.

jpeg_exif_datetimedigitized

Represents 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 the jpeg_exif_datetimeoriginal and jpeg_exif_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.

When the date and time are unknown, all the character spaces except colons (“:”) may be filled with blank characters, or else the interoperability field may be filled with blank characters.

The characters string length is 20 bytes including a null character for termination.

When the field is left blank, it is treated as unknown.

jpeg_exif_datetimeoriginal

Represents 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 YYYY:MM:DD HH:MM:SS with time shown in 24-hour format, and the date and time separated by one blank character.

When the date and time are unknown, all the character spaces except colons (“:”) may be filled with blank characters.

The character string length is 20 bytes including a null character for termination.

When the field is left blank, it is treated as unknown.

jpeg_exif_digitalzoomratio

Represents 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.

jpeg_exif_exifversion

Represents the version of this standard supported.

Non-existence of this field is taken to mean non-conformance to the standard. Conformance to this standard is indicated by recording 0220 as 4-byte ASCII.

Since the type is UNDEFINED, there is no null character for termination.

jpeg_exif_exposurebiasvalue

Represents the exposure bias.

Unit: APEX value (usually in the range of -99.99 to 99.99)

jpeg_exif_exposuremode

Represents 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.

Value:

0 – auto exposure

1 – manual exposure

2 – auto bracket

Other – reserved

jpeg_exif_exposureprogram

The class of the program used by the camera to set exposure when the picture is taken.

Value:

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)

jpeg_exif_exposuretime

Represents the exposure time of the image.

jpeg_exif_filesource

Represents the image source.

If a DSC recorded the image, this attribute value of this tag always be set to 3, indicating that the image was recorded on a DSC.

Value:

3 – DSC

Other – reserved

Default: 3

jpeg_exif_flash

Represents the status of flash when the images 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.

Value:

Bit 0: 0 – flash did not fire

Bit 0: 1 – flash fired

Bit 1 and 2: 00 – no strobe return detection function

Bit 1 and 2: 01 – reserved

Bit 1 and 2: 10 – strobe return light not detected

Bit 1 and 2: 11 – strobe return light detected

Bit 3 and 4: 00 – unknown

Bit 3 and 4: 01 – compulsory flash firing

Bit 3 and 4: 10 – compulsory flash suppression

Bit 3 and 4: 11 – auto mode

Bit 5: 0 – flash function present

Bit 5: 1 – no flash function

Bit 6: 0 – no red-eye reduction mode or unknown

Bit 6: 1 – red-eye reduction supported

jpeg_exif_flashpixversion

Represents the Flashpix format version supported by a FPXR file.

If the FPXR function supports Flashpix format ver. 1.0, this is indicated similarly to jpeg_exif_exifversion by recording 0100 as 4-byte ASCII.

Value:

0100 – flashpix format version 1.0

Other – reserved

Default: 0100

jpeg_exif_fnumber

Represents the f number of the recording equipment

jpeg_exif_focallength

Represents the actual focal length of the lens, in mm.

Conversion is not made to the focal length of a 35 mm film camera.

jpeg_exif_focallengthin35mmfilm

This indicates the equivalent focal length assuming a 35mm film camera, in mm.

A value of 0 means the focal length is unknown.

jpeg_exif_focalplaneresolutionunit

Represents the unit for measuring jpeg_exif_focalplanexresolution and jpeg_exif_focalplaneyresolution.

This value is the same as the jpeg_exif_resolutionunit.

jpeg_exif_focalplanexresolution

Represents the number of pixels in the image width (x) direction per jpeg_exif_focalplaneresolutionunit on the camera focal plane.

jpeg_exif_focalplaneyresolution

Represents the number of pixels in the image height (y) direction per jpeg_exif_focalplaneresolutionunit on the camera focal plane.

jpeg_exif_gaincontrol

The degree of overall image gain adjustment.

jpeg_exif_gpsaltitude

Represents the altitude, based on the reference.

Unit: meters

jpeg_exif_gpsaltituderef

This indicates the altitude used as the reference altitude.

Value:

0 – above sea level

1 – below sea level

jpeg_exif_gpsareainformation

Represents the name of the GPS area.

jpeg_exif_gpsdatestamp

Represents the date relative to UTC (Coordinated Universal Time).

Format: YYYY:MM:DD

jpeg_exif_gpsdestbearing

Represents the bearing to the destination point.

Value: Range from 0.00 to 359.99

jpeg_exif_gpsdestbearingref

Represents the reference used for giving the bearing to the destination point.

Value:

T – true direction

M – magnetic direction

jpeg_exif_gpsdestdistance

Represents the distance to the destination point.

jpeg_exif_gpsdestdistanceref

Represents the unit used to express the distance to the destination point.

Value:

K – kilometers per hour

M – miles per hour

N – knots

jpeg_exif_gpsdestlatitude

Represents the latitude of the destination point.

It is expressed as three numbers giving the degrees, minutes, and seconds, respectively.

jpeg_exif_gpsdestlatituderef

This indicates whether the latitude of the destination point is north or south.

Value:

N – north latitude

S – south latitude

jpeg_exif_gpsdestlongitude

Represents the longitude of the destination point.

It is expressed as three numbers giving the degrees, minutes, and seconds, respectively.

jpeg_exif_gpsdestlongituderef

This indicates whether the longitude of the destination point is east or west.

Value:

E – east longitude

W – west longitude

jpeg_exif_gpsdifferential

Represents whether differential correction is applied to the GPS receiver.

Value:

0 – measurement without differential correction

1 – differential correction applied

jpeg_exif_gpsdop

Represents the GPS DOP (data degree of precision).

An HDOP value is written during two-dimensional measurement, and PDOP during three-dimensional measurement.

jpeg_exif_gpsimgdirection

Represents the direction of the image when it was captured.

Value: Range from 0.00 to 359.99

jpeg_exif_gpsimgdirectionref

Represents the reference for giving the direction of the image when it is captured.

Value:

T – true direction

M – magnetic direction

jpeg_exif_gpslatitude

Represents the latitude. Used when geotagging photos.

Values:

This attribute is expressed as three numbers in the following order: degrees, minutes, and seconds (DMS).

For example:

122 50 32.36280000000261

indicates 122°, 50', 32.36280000000261".

Note  Values can be separated by spaces or semicolons (;).

jpeg_exif_gpslatituderef

This indicates whether the latitude is north or south. Used when geotagging photos.

Value:

N – north latitude

S – south latitude

jpeg_exif_gpslongitude

Represents the longitude. Used when geotagging photos.

Values:

This attribute is expressed as three numbers in the following order: degrees, minutes, and seconds (DMS). For example:

122 50 32.36280000000261

indicates 122°, 50', 32.36280000000261".

Note  DMS values can be separated by spaces or semicolons (;).

jpeg_exif_gpslongituderef

This indicates whether the longitude is east or west. Used when geotagging photos.

Value:

E – east longitude

W – west longitude

jpeg_exif_gpsmapdatum

Represents the geodetic survey data used by the GPS receiver.

jpeg_exif_gpsmeasuremode

Represents the GPS measurement mode.

Value:

2 – 2-dimensional measurement

3 – 3-dimensional measurement

jpeg_exif_gpsprocessingmethod

Represents the name of the method used for location finding.

jpeg_exif_gpssatellites

Represents the satellites used for measurements.

This tag can be used to describe the number of satellites, their ID number, angle of elevation, azimuth, SNR and other information in ASCII notation.

The format is not specified.

jpeg_exif_gpsspeed

Represents the speed of GPS receiver movement.

jpeg_exif_gpsspeedref

Represents the unit used to express the GPS receiver speed of movement.

Value:

K – kilometers per hour

M – miles per hour

N – knots

jpeg_exif_gpsstatus

Represents the status of the GPS receiver when the image is recorded.

Value:

A – measurement is in progress

V – measurement is Interoperability

jpeg_exif_gpstimestamp

Represents the time as UTC (Coordinated Universal Time).

It is expressed as three numbers giving the hour, minute, and second.

jpeg_exif_gpstrack

Represents the direction of GPS receiver movement.

Value: Range from 0.00 to 359.99.

jpeg_exif_gpstrackref

Represents the reference for giving the direction of GPS receiver movement.

Value:

T – true direction

M – magnetic direction

jpeg_exif_gpsversionid

Represents the version of the GPS Image File Folder.

The version is given as byte sequence 2, 2, 0, 0 to indicate version 2.2.

jpeg_exif_lightsource

The kind of light source.

0 – Unknown

1 – Daylight

2 – Fluorescent

3 – Tungsten (incandescent light)

4 – Flash

9 – Fine weather

10 – Cloudy weather

11 – Shade

12 – Daylight fluorescent (D 5700 – 7100K)

13 – Day white fluorescent (N 4600 – 5400K)

14 – Cool white fluorescent (W 3900 – 4500K)

15 – White fluorescent (WW 3200 – 3700K)

17 – Standard light A

18 – Standard light B

19 – Standard light C

20 – D55

21 – D65

22 – D75

23 – D50

24 – ISO studio tungsten

255 – Other light source

jpeg_exif_make

Represents 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.

jpeg_exif_makernote

Represents a tag for manufacturers of Exif writers to record any desired information.

The contents are up to the manufacturer, but this tag should not be used for any other than its intended purpose.

jpeg_exif_maxaperturevalue

Represents the smallest F number of the lens.

Units: APEX value (usually in the range of 00.00 to 99.99, but it is not limited to this range)

jpeg_exif_meteringmode

Represents the metering mode. The value can be:

0 – unknown (default)

1 – average

2 – center weighted average

3 – spot

4 – multispot

5 – pattern

6 – partial

Other – reserved

255 – other

jpeg_exif_model

Represents the model 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.

jpeg_exif_orientation

Represents the image orientation viewed in terms of rows and columns.

 

0th Row Orientation View

0th Column Orientation View

1

visual top

visual left-hand side

2

visual top

visual right-hand side

3

visual bottom

visual right-hand side

4

visual bottom

visual left-hand side

5

visual left-hand side

visual top

6

visual right-hand side

visual top

7

visual right-hand side

visual bottom

8

visual left-hand side

visual bottom

jpeg_exif_pixelxdimension

Represents information specific to compressed data.

When a compressed file is recorded, the valid width of the meaningful image shall be recorded in this attribute, whether or not there is padding data or a restart marker.

This attribute should not exist in an uncompressed file.

jpeg_exif_pixelydimension

Represents information specific to compressed data.

When a compressed file is recorded, the valid height of the meaningful image shall be recorded in this attribute, whether or not there is padding data or restart marker.

This attribute should not exist in an uncompressed file.

jpeg_exif_primarychromaticities

The chromaticity of the three primary colors of the image.

This tag is not usually necessary, since color space is specified in the color space information tag.

jpeg_exif_resolutionunit

Represents the unit of x and y resolution.

jpeg_exif_saturation

This indicates the direction of saturation processing applied by the camera when the image was shot.

Value:

0 – Normal

1 – Low saturation

2 – High saturation

jpeg_exif_scenecapturetype

Represents 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 attribute.

Value:

0 – standard (default)

1 – landscape

2 – portrait

3 – night scene

Other – reserved

jpeg_exif_sensingmethod

Represents the image sensor type on the camera or input device.

Value:

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 linear sensor

Other – reserved

jpeg_exif_sharpness

Indicates the direction of sharpness processing applied by the camera when the image was shot.

Value:

0 – Normal

1 – Soft

2 – Hard

jpeg_exif_shutterspeedvalue

Represents the shutter speed.

Unit: APEX (Additive System of Photographic Exposure) setting

jpeg_exif_software

Records the name and version of the software or firmware of the camera or image input device used to generate the image.

jpeg_exif_subjectdistancerange

The distance to the subject, such as Macro, Close View, or Distant View.

jpeg_exif_subsectime

Used to record fractions of seconds for the DateTime tag.

jpeg_exif_subsectime_digitized

Used to record fractions of seconds for the DateTimeDigitized tag.

jpeg_exif_subsectime_original

Used to record fractions of seconds for the DateTimeOriginal tag.

jpeg_exif_usercomment

Represents a tag for Exif users to write keywords or comments on the image.

jpeg_exif_whitebalance

Represents the white balance mode set when the image was shot.

Value:

0 – auto white balance

1 – manual white balance

Other – reserved

jpeg_exif_whitepoint

The chromaticity of the white point of the image.

This tag is not usually necessary, since color space is specified in the color space information tag.

jpeg_exif_xpauthor

Author tag used by Windows.

jpeg_exif_xpcomment

Comment tag used by Windows.

jpeg_exif_xpkeywords

Keywords tag used by Windows.

jpeg_exif_xpsubject

Subject tag used by Windows.

jpeg_exif_xptitle

Title tag used by Windows.

jpeg_exif_xresolution

Represents the number of pixels per jpeg_exif_resolutionunit in the jpeg_exif_imagewidth direction.

When the image resolution is unknown, 72 dpi is designated.

jpeg_exif_ycbcrcoefficients

The matrix coefficients for transformation from RGB to YCbCr image data.

jpeg_exif_ycbcrpositioning

Represents the position of chrominance components in relation to the luminance component.

This field is designated only for JPEG compressed date or uncompressed YCbCr data.

The 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 default is used.

jpeg_exif_yresolution

Represents the number of pixels per jpeg_exif_resolutionunit in the jpeg_exif_imagelength direction.

The same value as jpeg_exif_xresolution is designated.

jpeg_optimize

Specifies whether to optimize the output file. Optimization involves calculating encoding parameters to reduce file size without decreasing image quality. However, optimization may increase translation time.

This is a writer attribute.

jpeg_tab_file_generation

Enables or disables the generation of a TAB file along with the output JPEG image. Value: yes | no

Default: yes

This is a writer attribute.

jpeg_world_file_generation

Enables or disables the generation of a Esri world file along with the output JPEG image.

Default: yes

This is a writer attribute.

jpeg_write_exif_tags

Specifies whether to write Exif tags. When enabled, jpeg_exif_* attributes will be written as Exif tags.

This is a writer attribute.

jpeg_xmp_metadata

XMP is an open metadata standard created by Adobe. This attribute represents all XMP metadata on the raster as raw XML data.