Package com.drew.metadata.exif

Class ExifThumbnailDirectory

java.lang.Object

com.drew.metadata.Directory

com.drew.metadata.exif.ExifDirectoryBase

com.drew.metadata.exif.ExifThumbnailDirectory

public class ExifThumbnailDirectory
extends ExifDirectoryBase

One of several Exif directories. Otherwise known as IFD1, this directory holds information about an embedded thumbnail image.

Author:

Drew Noakes https://drewnoakes.com

Field Summary

Fields

Modifier and Type	Field	Description
static final int	TAG_THUMBNAIL_COMPRESSION	Deprecated. use ExifDirectoryBase.TAG_COMPRESSION instead.
static final int	TAG_THUMBNAIL_LENGTH	The size of the thumbnail image data in bytes.
static final int	TAG_THUMBNAIL_OFFSET	The offset to thumbnail image bytes, relative to the start of the IFD.

Fields inherited from class com.drew.metadata.exif.ExifDirectoryBase

TAG_35MM_FILM_EQUIV_FOCAL_LENGTH, TAG_ACCELERATION, TAG_APERTURE, TAG_APPLICATION_NOTES, TAG_ARTIST, TAG_BATTERY_LEVEL, TAG_BITS_PER_SAMPLE, TAG_BODY_SERIAL_NUMBER, TAG_BRIGHTNESS_VALUE, TAG_CAMERA_ELEVATION_ANGLE, TAG_CAMERA_OWNER_NAME, TAG_CFA_PATTERN, TAG_CFA_PATTERN_2, TAG_CFA_REPEAT_PATTERN_DIM, TAG_COLOR_SPACE, TAG_COMPONENTS_CONFIGURATION, TAG_COMPRESSED_AVERAGE_BITS_PER_PIXEL, TAG_COMPRESSION, TAG_CONTRAST, TAG_COPYRIGHT, TAG_CUSTOM_RENDERED, TAG_DATETIME, TAG_DATETIME_DIGITIZED, TAG_DATETIME_ORIGINAL, TAG_DEVICE_SETTING_DESCRIPTION, TAG_DIGITAL_ZOOM_RATIO, TAG_DOCUMENT_NAME, TAG_EXIF_IMAGE_HEIGHT, TAG_EXIF_IMAGE_WIDTH, TAG_EXIF_VERSION, TAG_EXPOSURE_BIAS, TAG_EXPOSURE_INDEX, TAG_EXPOSURE_INDEX_TIFF_EP, TAG_EXPOSURE_MODE, TAG_EXPOSURE_PROGRAM, TAG_EXPOSURE_TIME, TAG_EXTRA_SAMPLES, TAG_FILE_SOURCE, TAG_FILL_ORDER, TAG_FLASH, TAG_FLASH_ENERGY, TAG_FLASH_ENERGY_TIFF_EP, TAG_FLASHPIX_VERSION, TAG_FNUMBER, TAG_FOCAL_LENGTH, TAG_FOCAL_PLANE_RESOLUTION_UNIT, TAG_FOCAL_PLANE_X_RESOLUTION, TAG_FOCAL_PLANE_X_RESOLUTION_TIFF_EP, TAG_FOCAL_PLANE_Y_RESOLUTION, TAG_FOCAL_PLANE_Y_RESOLUTION_TIFF_EP, TAG_GAIN_CONTROL, TAG_GAMMA, TAG_HOST_COMPUTER, TAG_HUMIDITY, TAG_IMAGE_DESCRIPTION, TAG_IMAGE_HEIGHT, TAG_IMAGE_HISTORY, TAG_IMAGE_NUMBER, TAG_IMAGE_UNIQUE_ID, TAG_IMAGE_WIDTH, TAG_INTER_COLOR_PROFILE, TAG_INTERLACE, TAG_INTEROP_INDEX, TAG_INTEROP_VERSION, TAG_IPTC_NAA, TAG_ISO_EQUIVALENT, TAG_ISO_SPEED, TAG_ISO_SPEED_LATITUDE_YYY, TAG_ISO_SPEED_LATITUDE_ZZZ, TAG_JPEG_AC_TABLES, TAG_JPEG_DC_TABLES, TAG_JPEG_LOSSLESS_PREDICTORS, TAG_JPEG_POINT_TRANSFORMS, TAG_JPEG_PROC, TAG_JPEG_Q_TABLES, TAG_JPEG_RESTART_INTERVAL, TAG_JPEG_TABLES, TAG_LENS, TAG_LENS_MAKE, TAG_LENS_MODEL, TAG_LENS_SERIAL_NUMBER, TAG_LENS_SPECIFICATION, TAG_LIGHT_SOURCE, TAG_MAKE, TAG_MAKERNOTE, TAG_MAX_APERTURE, TAG_MAX_SAMPLE_VALUE, TAG_METERING_MODE, TAG_MIN_SAMPLE_VALUE, TAG_MODEL, TAG_NEW_SUBFILE_TYPE, TAG_NOISE, TAG_OPTO_ELECTRIC_CONVERSION_FUNCTION, TAG_ORIENTATION, TAG_PADDING, TAG_PAGE_NAME, TAG_PAGE_NUMBER, TAG_PANASONIC_TITLE, TAG_PANASONIC_TITLE_2, TAG_PHOTOMETRIC_INTERPRETATION, TAG_PHOTOSHOP_SETTINGS, TAG_PLANAR_CONFIGURATION, TAG_PREDICTOR, TAG_PRESSURE, TAG_PRIMARY_CHROMATICITIES, TAG_PRINT_IMAGE_MATCHING_INFO, TAG_RATING, TAG_RATING_PERCENT, TAG_RECOMMENDED_EXPOSURE_INDEX, TAG_REFERENCE_BLACK_WHITE, TAG_RELATED_IMAGE_FILE_FORMAT, TAG_RELATED_IMAGE_HEIGHT, TAG_RELATED_IMAGE_WIDTH, TAG_RELATED_SOUND_FILE, TAG_RESOLUTION_UNIT, TAG_ROWS_PER_STRIP, TAG_SAMPLE_FORMAT, TAG_SAMPLES_PER_PIXEL, TAG_SATURATION, TAG_SCENE_CAPTURE_TYPE, TAG_SCENE_TYPE, TAG_SECURITY_CLASSIFICATION, TAG_SELF_TIMER_MODE_TIFF_EP, TAG_SENSING_METHOD, TAG_SENSITIVITY_TYPE, TAG_SHARPNESS, TAG_SHUTTER_SPEED, TAG_SOFTWARE, TAG_SPATIAL_FREQ_RESPONSE, TAG_SPATIAL_FREQ_RESPONSE_TIFF_EP, TAG_SPECTRAL_SENSITIVITY, TAG_STANDARD_ID_TIFF_EP, TAG_STANDARD_OUTPUT_SENSITIVITY, TAG_STRIP_BYTE_COUNTS, TAG_STRIP_OFFSETS, TAG_STRIP_ROW_COUNTS, TAG_SUB_IFD_OFFSET, TAG_SUBFILE_TYPE, TAG_SUBJECT_DISTANCE, TAG_SUBJECT_DISTANCE_RANGE, TAG_SUBJECT_LOCATION, TAG_SUBJECT_LOCATION_TIFF_EP, TAG_SUBSECOND_TIME, TAG_SUBSECOND_TIME_DIGITIZED, TAG_SUBSECOND_TIME_ORIGINAL, TAG_TEMPERATURE, TAG_THRESHOLDING, TAG_TILE_BYTE_COUNTS, TAG_TILE_LENGTH, TAG_TILE_OFFSETS, TAG_TILE_WIDTH, TAG_TIME_ZONE, TAG_TIME_ZONE_DIGITIZED, TAG_TIME_ZONE_OFFSET_TIFF_EP, TAG_TIME_ZONE_ORIGINAL, TAG_TRANSFER_FUNCTION, TAG_TRANSFER_RANGE, TAG_USER_COMMENT, TAG_WATER_DEPTH, TAG_WHITE_BALANCE, TAG_WHITE_BALANCE_MODE, TAG_WHITE_POINT, TAG_WIN_AUTHOR, TAG_WIN_COMMENT, TAG_WIN_KEYWORDS, TAG_WIN_SUBJECT, TAG_WIN_TITLE, TAG_X_RESOLUTION, TAG_Y_RESOLUTION, TAG_YCBCR_COEFFICIENTS, TAG_YCBCR_POSITIONING, TAG_YCBCR_SUBSAMPLING

Constructor Summary

Constructors

Constructor	Description
ExifThumbnailDirectory(int exifStartOffset)

Method Summary

Modifier and Type	Method	Description
Integer	getAdjustedThumbnailOffset()	Returns the offset to thumbnail data within the outermost data stream.
int	getExifStartOffset()	Gets the offset at which the Exif data stream commenced within any containing stream.
String	getName()	Provides the name of the directory, for display purposes.

Methods inherited from class com.drew.metadata.Directory

addError, containsTag, getBoolean, getBooleanObject, getByteArray, getDate, getDate, getDate, getDescription, getDouble, getDoubleObject, getErrorCount, getErrors, getFloat, getFloatObject, getInt, getIntArray, getInteger, getLong, getLongObject, getObject, getParent, getRational, getRationalArray, getString, getString, getStringArray, getStringValue, getStringValueArray, getTagCount, getTagName, getTags, hasErrors, hasTagName, isEmpty, setBoolean, setByteArray, setDate, setDescriptor, setDouble, setDoubleArray, setFloat, setFloatArray, setInt, setIntArray, setLong, setObject, setObjectArray, setParent, setRational, setRationalArray, setString, setStringArray, setStringValue, setStringValueArray, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

TAG_THUMBNAIL_OFFSET

public static final int TAG_THUMBNAIL_OFFSET

The offset to thumbnail image bytes, relative to the start of the IFD. To obtain the offset relative to the start of the TIFF data stream, use getAdjustedThumbnailOffset, which includes the value of getExifStartOffset.

See Also:

• Constant Field Values

TAG_THUMBNAIL_LENGTH

public static final int TAG_THUMBNAIL_LENGTH

The size of the thumbnail image data in bytes.

See Also:

• Constant Field Values

TAG_THUMBNAIL_COMPRESSION

@Deprecated
public static final int TAG_THUMBNAIL_COMPRESSION

Deprecated.

use ExifDirectoryBase.TAG_COMPRESSION instead.

See Also:

• Constant Field Values

Constructor Details

ExifThumbnailDirectory

public ExifThumbnailDirectory(int exifStartOffset)

Method Details

getName

public String getName()

Description copied from class: Directory

Provides the name of the directory, for display purposes. E.g. Exif

Specified by:

getName in class Directory

Returns:

the name of the directory

getExifStartOffset

public int getExifStartOffset()

Gets the offset at which the Exif data stream commenced within any containing stream.

getAdjustedThumbnailOffset

public Integer getAdjustedThumbnailOffset()

Returns the offset to thumbnail data within the outermost data stream. The value for TagThumbnailOffset is relative to the Exif data stream. Generally, consumers of thumbnail data need this value relative to the outermost stream, so that the thumbnail data may be extracted from that stream. This property adds the value of ExifStartOffset to this tag's value in order to produce that value. Returns null when the tag is not defined in this directory.