3 * Copyright © 2001 Lutz Müller <lutz@users.sourceforge.net>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
31 const char *description;
33 {EXIF_TAG_INTEROPERABILITY_INDEX, "InteroperabilityIndex",
34 "InteroperabilityIndex",
35 N_("Indicates the identification of the Interoperability rule. "
36 "Use \"R98\" for stating ExifR98 Rules. Four bytes used "
37 "including the termination code (NULL). see the separate "
38 "volume of Recommended Exif Interoperability Rules (ExifR98) "
39 "for other tags used for ExifR98.")},
40 {EXIF_TAG_INTEROPERABILITY_VERSION, "InteroperabilityVersion",
41 "InteroperabilityVersion", ""},
42 {EXIF_TAG_IMAGE_WIDTH, "ImageWidth", N_("Image Width"),
43 N_("The number of colums of image data, equal to the number of "
44 "pixels per row. In JPEG compressed data a JPEG marker is "
45 "used instead of this tag.")},
46 {EXIF_TAG_IMAGE_LENGTH, "ImageLength", N_("Image Length"),
47 N_("The number of rows of image data. In JPEG compressed data a "
48 "JPEG marker is used instead of this tag.")},
49 {EXIF_TAG_BITS_PER_SAMPLE, "BitsPerSample", N_("Bits per Sample"),
50 N_("The number of bits per image component. In this standard each "
51 "component of the image is 8 bits, so the value for this "
52 "tag is 9. See also <SamplesPerPixel>. In JPEG compressed data "
53 "a JPEG marker is used instead of this tag.")},
54 {EXIF_TAG_COMPRESSION, "Compression", N_("Compression"),
55 N_("The compression scheme used for the image data. When a "
56 "primary image is JPEG compressed, this designation is "
57 "not necessary and is omitted. When thumbnails use JPEG "
58 "compression, this tag value is set to 6.")},
59 {EXIF_TAG_PHOTOMETRIC_INTERPRETATION, "PhotometricInterpretation",
60 N_("Photometric Interpretation"),
61 N_("The pixel composition. In JPEG compressed data a JPEG "
62 "marker is used instead of this tag.")},
63 {EXIF_TAG_FILL_ORDER, "FillOrder", N_("Fill Order"), ""},
64 {EXIF_TAG_DOCUMENT_NAME, "DocumentName", N_("Document Name"), ""},
65 {EXIF_TAG_IMAGE_DESCRIPTION, "ImageDescription",
66 N_("Image Description"),
67 N_("A character string giving the title of the image. It may be "
68 "a comment such as \"1988 company picnic\" or "
69 "the like. Two-bytes character codes cannot be used. "
70 "When a 2-bytes code is necessary, the Exif Private tag "
71 "<UserComment> is to be used.")},
72 {EXIF_TAG_MAKE, "Make", N_("Manufacturer"),
73 N_("The manufacturer of the recording "
74 "equipment. This is the manufacturer of the DSC, scanner, "
75 "video digitizer or other equipment that generated the "
76 "image. When the field is left blank, it is treated as "
78 {EXIF_TAG_MODEL, "Model", N_("Model"),
79 N_("The model name or model number of the equipment. This is the "
80 "model name or number of the DSC, scanner, video digitizer "
81 "or other equipment that generated the image. When the field "
82 "is left blank, it is treated as unknown.")},
83 {EXIF_TAG_STRIP_OFFSETS, "StripOffsets", N_("Strip Offsets"),
84 N_("For each strip, the byte offset of that strip. It is "
85 "recommended that this be selected so the number of strip "
86 "bytes does not exceed 64 Kbytes. With JPEG compressed "
87 "data this designation is not needed and is omitted. See also "
88 "<RowsPerStrip> and <StripByteCounts>.")},
89 {EXIF_TAG_ORIENTATION, "Orientation", N_("Orientation"),
90 N_("The image orientation viewed in terms of rows and colums.")},
91 {EXIF_TAG_SAMPLES_PER_PIXEL, "SamplesPerPixel",
92 N_("Samples per Pixel"),
93 N_("The number of components per pixel. Since this standard applies "
94 "to RGB and YCbCr images, the value set for this tag is 3. "
95 "In JPEG compressed data a JPEG marker is used instead of this "
97 {EXIF_TAG_ROWS_PER_STRIP, "RowsPerStrip", N_("Rows per Strip"),
98 N_("The number of rows per strip. This is the number of rows "
99 "in the image of one strip when an image is divided into "
100 "strips. With JPEG compressed data this designation is not "
101 "needed and is omitted. See also <RowsPerStrip> and "
102 "<StripByteCounts>.")},
103 {EXIF_TAG_STRIP_BYTE_COUNTS, "StripByteCounts", N_("Strip Byte Count"),
104 N_("The total number of bytes in each strip. With JPEG compressed "
105 "data this designation is not needed and is omitted.")},
106 {EXIF_TAG_X_RESOLUTION, "XResolution", N_("x-Resolution"),
107 N_("The number of pixels per <ResolutionUnit> in the <ImageWidth> "
108 "direction. When the image resolution is unknown, 72 [dpi] "
110 {EXIF_TAG_Y_RESOLUTION, "YResolution", N_("y-Resolution"),
111 N_("The number of pixels per <ResolutionUnit> in the <ImageLength> "
112 "direction. The same value as <XResolution> is designated.")},
113 {EXIF_TAG_PLANAR_CONFIGURATION, "PlanarConfiguration",
114 N_("Planar Configuration"),
115 N_("Indicates whether pixel components are recorded in a chunky "
116 "or planar format. In JPEG compressed files a JPEG marker "
117 "is used instead of this tag. If this field does not exist, "
118 "the TIFF default of 1 (chunky) is assumed.")},
119 {EXIF_TAG_RESOLUTION_UNIT, "ResolutionUnit", N_("Resolution Unit"),
120 N_("The unit for measuring <XResolution> and <YResolution>. The same "
121 "unit is used for both <XResolution> and <YResolution>. If "
122 "the image resolution is unknown, 2 (inches) is designated.")},
123 {EXIF_TAG_TRANSFER_FUNCTION, "TransferFunction",
124 N_("Transfer Function"),
125 N_("A transfer function for the image, described in tabular style. "
126 "Normally this tag is not necessary, since color space is "
127 "specified in the color space information tag (<ColorSpace>).")},
128 {EXIF_TAG_SOFTWARE, "Software", N_("Software"),
129 N_("This tag records the name and version of the software or "
130 "firmware of the camera or image input device used to "
131 "generate the image. The detailed format is not specified, but "
132 "it is recommended that the example shown below be "
133 "followed. When the field is left blank, it is treated as "
135 {EXIF_TAG_DATE_TIME, "DateTime", N_("Date and Time"),
136 N_("The date and time of image creation. In this standard "
137 "(EXIF-2.1) it is the date and time the file was changed.")},
138 {EXIF_TAG_ARTIST, "Artist", N_("Artist"),
139 N_("This tag records the name of the camera owner, photographer or "
140 "image creator. The detailed format is not specified, but it is "
141 "recommended that the information be written as in the example "
142 "below for ease of Interoperability. When the field is "
143 "left blank, it is treated as unknown.")},
144 {EXIF_TAG_WHITE_POINT, "WhitePoint", N_("White Point"),
145 N_("The chromaticity of the white point of the image. Normally "
146 "this tag is not necessary, since color space is specified "
147 "in the colorspace information tag (<ColorSpace>).")},
148 {EXIF_TAG_PRIMARY_CHROMATICITIES, "PrimaryChromaticities",
149 N_("Primary Chromaticities"),
150 N_("The chromaticity of the three primary colors of the image. "
151 "Normally this tag is not necessary, since colorspace is "
152 "specified in the colorspace information tag (<ColorSpace>).")},
153 {EXIF_TAG_TRANSFER_RANGE, "TransferRange", N_("Transfer Range"), ""},
154 {EXIF_TAG_JPEG_PROC, "JPEGProc", "JPEGProc", ""},
155 {EXIF_TAG_JPEG_INTERCHANGE_FORMAT, "JPEGInterchangeFormat",
156 N_("JPEG Interchange Format"),
157 N_("The offset to the start byte (SOI) of JPEG compressed "
158 "thumbnail data. This is not used for primary image "
160 {EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH,
161 "JPEGInterchangeFormatLength", N_("JPEG Interchange Format Length"),
162 N_("The number of bytes of JPEG compressed thumbnail data. This "
163 "is not used for primary image JPEG data. JPEG thumbnails "
164 "are not divided but are recorded as a continuous JPEG "
165 "bitstream from SOI to EOI. Appn and COM markers should "
166 "not be recorded. Compressed thumbnails must be recorded in no "
167 "more than 64 Kbytes, including all other data to be "
168 "recorded in APP1.")},
169 {EXIF_TAG_YCBCR_COEFFICIENTS, "YCbCrCoefficients",
170 N_("YCbCr Coefficients"),
171 N_("The matrix coefficients for transformation from RGB to YCbCr "
172 "image data. No default is given in TIFF; but here the "
173 "value given in Appendix E, \"Color Space Guidelines\", is used "
174 "as the default. The color space is declared in a "
175 "color space information tag, with the default being the value "
176 "that gives the optimal image characteristics "
177 "Interoperability this condition.")},
178 {EXIF_TAG_YCBCR_SUB_SAMPLING, "YCbCrSubSampling",
179 N_("YCbCr Sub-Sampling"),
180 N_("The sampling ratio of chrominance components in relation to the "
181 "luminance component. In JPEG compressed data a JPEG marker "
182 "is used instead of this tag.")},
183 {EXIF_TAG_YCBCR_POSITIONING, "YCbCrPositioning",
184 N_("YCbCr Positioning"),
185 N_("The position of chrominance components in relation to the "
186 "luminance component. This field is designated only for "
187 "JPEG compressed data or uncompressed YCbCr data. The TIFF "
188 "default is 1 (centered); but when Y:Cb:Cr = 4:2:2 it is "
189 "recommended in this standard that 2 (co-sited) be used to "
190 "record data, in order to improve the image quality when viewed "
191 "on TV systems. When this field does not exist, the reader shall "
192 "assume the TIFF default. In the case of Y:Cb:Cr = 4:2:0, the "
193 "TIFF default (centered) is recommended. If the reader "
194 "does not have the capability of supporting both kinds of "
195 "<YCbCrPositioning>, it shall follow the TIFF default regardless "
196 "of the value in this field. It is preferable that readers "
197 "be able to support both centered and co-sited positioning.")},
198 {EXIF_TAG_REFERENCE_BLACK_WHITE, "ReferenceBlackWhite",
199 N_("Reference Black/White"),
200 N_("The reference black point value and reference white point "
201 "value. No defaults are given in TIFF, but the values "
202 "below are given as defaults here. The color space is declared "
203 "in a color space information tag, with the default "
204 "being the value that gives the optimal image characteristics "
205 "Interoperability these conditions.")},
206 {EXIF_TAG_RELATED_IMAGE_FILE_FORMAT, "RelatedImageFileFormat",
207 "RelatedImageFileFormat", ""},
208 {EXIF_TAG_RELATED_IMAGE_WIDTH, "RelatedImageWidth",
209 "RelatedImageWidth", ""},
210 {EXIF_TAG_RELATED_IMAGE_LENGTH, "RelatedImageLength",
211 "RelatedImageLength", ""},
212 {EXIF_TAG_CFA_REPEAT_PATTERN_DIM, "CFARepeatPatternDim",
213 "CFARepeatPatternDim", ""},
214 {EXIF_TAG_CFA_PATTERN, "CFAPattern",
216 N_("Indicates the color filter array (CFA) geometric pattern of the "
217 "image sensor when a one-chip color area sensor is used. "
218 "It does not apply to all sensing methods.")},
219 {EXIF_TAG_BATTERY_LEVEL, "BatteryLevel", N_("Battery Level"), ""},
220 {EXIF_TAG_COPYRIGHT, "Copyright", N_("Copyright"),
221 N_("Copyright information. In this standard the tag is used to "
222 "indicate both the photographer and editor copyrights. It is "
223 "the copyright notice of the person or organization claiming "
224 "rights to the image. The Interoperability copyright "
225 "statement including date and rights should be written in this "
226 "field; e.g., \"Copyright, John Smith, 19xx. All rights "
227 "reserved.\". In this standard the field records both the "
228 "photographer and editor copyrights, with each recorded in a "
229 "separate part of the statement. When there is a clear "
230 "distinction between the photographer and editor copyrights, "
231 "these are to be written in the order of photographer followed "
232 "by editor copyright, separated by NULL (in this case, "
233 "since the statement also ends with a NULL, there are two NULL "
234 "codes) (see example 1). When only the photographer is given, "
235 "it is terminated by one NULL code (see example 2). When only "
236 "the editor copyright is given, "
237 "the photographer copyright part consists of one space followed "
238 "by a terminating NULL code, then the editor copyright is given "
239 "(see example 3). When the field is left blank, it is treated "
241 {EXIF_TAG_EXPOSURE_TIME, "ExposureTime", N_("Exposure Time"),
242 N_("Exposure time, given in seconds (sec).")},
243 {EXIF_TAG_FNUMBER, "FNumber", "FNumber",
244 N_("The F number.")},
245 {EXIF_TAG_IPTC_NAA, "IPTC/NAA", "IPTC/NAA", ""},
246 {EXIF_TAG_EXIF_IFD_POINTER, "ExifIFDPointer", "ExifIFDPointer",
247 N_("A pointer to the Exif IFD. Interoperability, Exif IFD has the "
248 "same structure as that of the IFD specified in TIFF. "
249 "ordinarily, however, it does not contain image data as in "
250 "the case of TIFF.")},
251 {EXIF_TAG_INTER_COLOR_PROFILE, "InterColorProfile",
252 "InterColorProfile", ""},
253 {EXIF_TAG_EXPOSURE_PROGRAM, "ExposureProgram", "ExposureProgram",
254 N_("The class of the program used by the camera to set exposure "
255 "when the picture is taken.")},
256 {EXIF_TAG_SPECTRAL_SENSITIVITY, "SpectralSensitivity",
257 N_("Spectral Sensitivity"),
258 N_("Indicates the spectral sensitivity of each channel of the "
259 "camera used. The tag value is an ASCII string compatible "
260 "with the standard developed by the ASTM Technical committee.")},
261 {EXIF_TAG_GPS_INFO_IFD_POINTER, "GPSInfoIFDPointer",
263 N_("A pointer to the GPS Info IFD. The "
264 "Interoperability structure of the GPS Info IFD, like that of "
265 "Exif IFD, has no image data.")},
267 {EXIF_TAG_GPS_VERSION_ID, "GPSVersionID", "",
268 N_("Indicates the version of <GPSInfoIFD>. The version is given "
269 "as 2.0.0.0. This tag is mandatory when <GPSInfo> tag is "
270 "present. (Note: The <GPSVersionID tag is given in bytes, "
271 "unlike the <ExifVersion> tag. When the version is "
272 "2.0.0.0, the tag value is 02000000.H).")},
273 {EXIF_TAG_GPS_LATITUDE_REF, "GPSLatitudeRef", ""
274 N_("Indicates whether the latitude is north or south latitude. The "
275 "ASCII value 'N' indicates north latitude, and 'S' is south "
277 {EXIF_TAG_GPS_LATITUDE, "GPSLatitude", ""
278 N_("Indicates the latitude. The latitude is expressed as three "
279 "RATIONAL values giving the degrees, minutes, and seconds, "
280 "respectively. When degrees, minutes and seconds are expressed, "
281 "the format is dd/1,mm/1,ss/1. When degrees and minutes are used "
282 "and, for example, fractions of minutes are given up to two "
283 "two decimal places, the format is dd/1,mmmm/100,0/1.")},
284 {EXIF_TAG_GPS_LONGITUDE_REF, "GPSLongitudeRef", ""
285 N_("Indicates whether the longitude is east or west longitude. "
286 "ASCII 'E' indicates east longitude, and 'W' is west "
288 {EXIF_TAG_GPS_LONGITUDE, "GPSLongitude", ""
289 N_("Indicates the longitude. The longitude is expressed as three "
290 "RATIONAL values giving the degrees, minutes, and seconds, "
291 "respectively. When degrees, minutes and seconds are expressed, "
292 "the format is ddd/1,mm/1,ss/1. When degrees and minutes are "
293 "used and, for example, fractions of minutes are given up to "
294 "two decimal places, the format is ddd/1,mmmm/100,0/1.")},
296 {EXIF_TAG_ISO_SPEED_RATINGS, "ISOSpeedRatings",
297 N_("ISO Speed Ratings"),
298 N_("Indicates the ISO Speed and ISO Latitude of the camera or "
299 "input device as specified in ISO 12232.")},
300 {EXIF_TAG_OECF, "OECF", "OECF",
301 N_("Indicates the Opto-Electoric Conversion Function (OECF) "
302 "specified in ISO 14524. <OECF> is the relationship between "
303 "the camera optical input and the image values.")},
304 {EXIF_TAG_EXIF_VERSION, "ExifVersion", N_("Exif Version"),
305 N_("The version of this standard supported. Nonexistence of this "
306 "field is taken to mean nonconformance to the standard.")},
307 {EXIF_TAG_DATE_TIME_ORIGINAL, "DateTimeOriginal",
308 N_("Date and Time (original)"),
309 N_("The date and time when the original image data was generated. "
310 "For a digital still camera "
311 "the date and time the picture was taken are recorded.")},
312 {EXIF_TAG_DATE_TIME_DIGITIZED, "DateTimeDigitized",
313 N_("Date and Time (digitized)"),
314 N_("The date and time when the image was stored as digital data. ")},
315 {EXIF_TAG_COMPONENTS_CONFIGURATION, "ComponentsConfiguration",
316 "ComponentsConfiguration",
317 N_("Information specific to compressed data. The channels of "
318 "each component are arranged in order from the 1st "
319 "component to the 4th. For uncompressed data the data "
320 "arrangement is given in the <PhotometricInterpretation> tag. "
321 "However, since <PhotometricInterpretation> can only "
322 "express the order of Y, Cb and Cr, this tag is provided "
323 "for cases when compressed data uses components other than "
324 "Y, Cb, and Cr and to enable support of other sequences.")},
325 {EXIF_TAG_COMPRESSED_BITS_PER_PIXEL, "CompressedBitsPerPixel",
326 N_("Compressed Bits per Pixel"),
327 N_("Information specific to compressed data. The compression mode "
328 "used for a compressed image is indicated in unit bits "
330 {EXIF_TAG_SHUTTER_SPEED_VALUE, "ShutterSpeedValue", N_("Shutter speed"),
331 N_("Shutter speed. The unit is the APEX (Additive System of "
332 "Photographic Exposure) setting (see Appendix C).")},
333 {EXIF_TAG_APERTURE_VALUE, "ApertureValue", N_("Aperture"),
334 N_("The lens aperture. The unit is the APEX value.")},
335 {EXIF_TAG_BRIGHTNESS_VALUE, "BrightnessValue", N_("Brightness"),
336 N_("The value of brightness. The unit is the APEX value. "
337 "Ordinarily it is given in the range of -99.99 to 99.99.")},
338 {EXIF_TAG_EXPOSURE_BIAS_VALUE, "ExposureBiasValue",
340 N_("The exposure bias. The units is the APEX value. Ordinarily "
341 "it is given in the range of -99.99 to 99.99.")},
342 {EXIF_TAG_MAX_APERTURE_VALUE, "MaxApertureValue", "MaxApertureValue",
343 N_("The smallest F number of the lens. The unit is the APEX value. "
344 "Ordinarily it is given in the range of 00.00 to 99.99, "
345 "but it is not limited to this range.")},
346 {EXIF_TAG_SUBJECT_DISTANCE, "SubjectDistance",
347 N_("Subject Distance"),
348 N_("The distance to the subject, given in meters.")},
349 {EXIF_TAG_METERING_MODE, "MeteringMode", N_("Metering Mode"),
350 N_("The metering mode.")},
351 {EXIF_TAG_LIGHT_SOURCE, "LightSource", N_("Light Source"),
352 N_("The kind of light source.")},
353 {EXIF_TAG_FLASH, "Flash", N_("Flash"),
354 N_("This tag is recorded when an image is taken using a strobe "
356 {EXIF_TAG_FOCAL_LENGTH, "FocalLength", N_("Focal Length"),
357 N_("The actual focal length of the lens, in mm. Conversion is not "
358 "made to the focal length of a 35 mm film camera.")},
359 {EXIF_TAG_MAKER_NOTE, "MakerNote", N_("Maker Note"),
360 N_("A tag for manufacturers of Exif writers to record any desired "
361 "information. The contents are up to the manufacturer.")},
362 {EXIF_TAG_USER_COMMENT, "UserComment", N_("User Comment"),
363 N_("A tag for Exif users to write keywords or comments on the image "
364 "besides those in <ImageDescription>, and without the "
365 "character code limitations of the <ImageDescription> tag. The "
366 "character code used in the <UserComment> tag is identified "
367 "based on an ID code in a fixed 8-byte area at the start of "
368 "the tag data area. The unused portion of the area is padded "
369 "with NULL (\"00.h\"). ID codes are assigned by means of "
370 "registration. The designation method and references for each "
371 "character code are given in Table 6. The value of CountN "
372 "is determinated based on the 8 bytes in the character code "
373 "area and the number of bytes in the user comment part. Since "
374 "the TYPE is not ASCII, NULL termination is not necessary "
376 "The ID code for the <UserComment> area may be a Defined code "
377 "such as JIS or ASCII, or may be Undefined. The Undefined name "
378 "is UndefinedText, and the ID code is filled with 8 bytes of all "
379 "\"NULL\" (\"00.H\"). An Exif reader that reads the "
380 "<UserComment> tag must have a function for determining the "
381 "ID code. This function is not required in Exif readers that "
382 "do not use the <UserComment> tag (see Table 7). "
383 "When a <UserComment> area is set aside, it is recommended that "
384 "the ID code be ASCII and that the following user comment "
385 "part be filled with blank characters [20.H].")},
386 {EXIF_TAG_SUB_SEC_TIME, "SubsecTime", "SubsecTime",
387 N_("A tag used to record fractions of seconds for the "
389 {EXIF_TAG_SUB_SEC_TIME_ORIGINAL, "SubSecTimeOriginal",
390 "SubSecTimeOriginal",
391 N_("A tag used to record fractions of seconds for the "
392 "<DateTimeOriginal> tag.")},
393 {EXIF_TAG_SUB_SEC_TIME_DIGITIZED, "SubSecTimeDigitized",
394 "SubSecTimeDigitized",
395 N_("A tag used to record fractions of seconds for the "
396 "<DateTimeDigitized> tag.")},
397 {EXIF_TAG_FLASH_PIX_VERSION, "FlashPixVersion", "FlashPixVersion",
398 N_("The FlashPix format version supported by a FPXR file.")},
399 {EXIF_TAG_COLOR_SPACE, "ColorSpace", N_("Color Space"),
400 N_("The color space information tag is always "
401 "recorded as the color space specifier. Normally sRGB (=1) "
402 "is used to define the color space based on the PC monitor "
403 "conditions and environment. If a color space other than "
404 "sRGB is used, Uncalibrated (=FFFF.H) is set. Image data "
405 "recorded as Uncalibrated can be treated as sRGB when it is "
406 "converted to FlashPix. On sRGB see Appendix E.")},
407 {EXIF_TAG_PIXEL_X_DIMENSION, "PixelXDimension", "PixelXDimension",
408 N_("Information specific to compressed data. When a "
409 "compressed file is recorded, the valid width of the "
410 "meaningful image must be recorded in this tag, whether or "
411 "not there is padding data or a restart marker. This tag "
412 "should not exist in an uncompressed file. For details see "
413 "section 2.8.1 and Appendix F.")},
414 {EXIF_TAG_PIXEL_Y_DIMENSION, "PixelYDimension", "PixelYDimension",
415 N_("Information specific to compressed data. When a compressed "
416 "file is recorded, the valid height of the meaningful image "
417 "must be recorded in this tag, whether or not there is padding "
418 "data or a restart marker. This tag should not exist in an "
419 "uncompressed file. For details see section 2.8.1 and Appendix "
420 "F. Since data padding is unnecessary in the vertical direction, "
421 "the number of lines recorded in this valid image height tag "
422 "will in fact be the same as that recorded in the SOF.")},
423 {EXIF_TAG_RELATED_SOUND_FILE, "RelatedSoundFile",
425 N_("This tag is used to record the name of an audio file related "
426 "to the image data. The only relational information "
427 "recorded here is the Exif audio file name and extension (an "
428 "ASCII string consisting of 8 characters + '.' + 3 "
429 "characters). The path is not recorded. Stipulations on audio "
430 "are given in section 3.6.3. File naming conventions are "
431 "given in section 3.7.1. "
432 "When using this tag, audio files must be recorded in "
433 "conformance to the Exif audio format. Writers are also allowed "
434 "to store the data such as Audio within APP2 as FlashPix "
435 "extension stream data. "
436 "Audio files must be recorded in conformance to the Exif audio "
437 "format. The mapping of Exif image files and audio files is done "
438 "in any of the three ways shown in Table 8. If multiple files "
439 "are mapped to one file as in [2] or [3] of this table, the above "
440 "format is used to record just one audio file name. If "
441 "there are multiple audio files, the first recorded file is "
442 "given. In the case of [3] in Table 8, for example, for the "
443 "Exif image file \"DSC00001.JPG\" only \"SND00001.WAV\" is "
444 "given as the related Exif audio file. When there are three "
445 "Exif audio files \"SND00001.WAV\", \"SND00002.WAV\" and "
446 "\"SND00003.WAV\", the Exif image file name for each of them, "
447 "\"DSC00001.JPG\", is indicated. By combining multiple "
448 "relational information, a variety of playback possibilities "
449 "can be supported. The method of using relational information "
450 "is left to the implementation on the playback side. Since this "
451 "information is an ASCII character string, it is terminated by "
452 "NULL. When this tag is used to map audio files, the relation "
453 "of the audio file to image data must also be indicated on the "
455 {EXIF_TAG_INTEROPERABILITY_IFD_POINTER, "InteroperabilityIFDPointer",
456 "InteroperabilityIFDPointer",
457 N_("Interoperability IFD is composed of tags which stores the "
458 "information to ensure the Interoperability and pointed "
459 "by the following tag located in Exif IFD. "
460 "The Interoperability structure of Interoperability IFD is "
461 "the same as TIFF defined IFD structure "
462 "but does not contain the "
463 "image data characteristically compared with normal TIFF "
465 {EXIF_TAG_FLASH_ENERGY, "FlashEnergy", N_("Flash Energy"),
466 N_("Indicates the strobe energy at the time the image is "
467 "captured, as measured in Beam Candle Power Seconds (BCPS).")},
468 {EXIF_TAG_SPATIAL_FREQUENCY_RESPONSE, "SpatialFrequencyResponse",
469 N_("Spatial Frequency Response"),
470 N_("This tag records the camera or input device spatial frequency "
471 "table and SFR values in the direction of image width, "
472 "image height, and diagonal direction, as specified in ISO "
474 {EXIF_TAG_FOCAL_PLANE_X_RESOLUTION, "FocalPlaneXResolution",
475 N_("Focal Plane x-Resolution"),
476 N_("Indicates the number of pixels in the image width (X) direction "
477 "per <FocalPlaneResolutionUnit> on the camera focal plane.")},
478 {EXIF_TAG_FOCAL_PLANE_Y_RESOLUTION, "FocalPlaneYResolution",
479 N_("Focal Plane y-Resolution"),
480 N_("Indicates the number of pixels in the image height (V) direction "
481 "per <FocalPlaneResolutionUnit> on the camera focal plane.")},
482 {EXIF_TAG_FOCAL_PLANE_RESOLUTION_UNIT, "FocalPlaneResolutionUnit",
483 N_("Focal Plane Resolution Unit"),
484 N_("Indicates the unit for measuring <FocalPlaneXResolution> and "
485 "<FocalPlaneYResolution>. This value is the same as the "
486 "<ResolutionUnit>.")},
487 {EXIF_TAG_SUBJECT_LOCATION, "SubjectLocation",
488 N_("Subject Location"),
489 N_("Indicates the location of the main subject in the scene. The "
490 "value of this tag represents the pixel at the center of the "
491 "main subject relative to the left edge, prior to rotation "
492 "processing as per the <Rotation> tag. The first value "
493 "indicates the X column number and second indicates "
494 "the Y row number.")},
495 {EXIF_TAG_EXPOSURE_INDEX, "ExposureIndex", N_("Exposure index"),
496 N_("Indicates the exposure index selected on the camera or "
497 "input device at the time the image is captured.")},
498 {EXIF_TAG_SENSING_METHOD, "SensingMethod", N_("Sensing Method"),
499 N_("Indicates the image sensor type on the camera or input "
501 {EXIF_TAG_FILE_SOURCE, "FileSource", N_("File Source"),
502 N_("Indicates the image source. If a DSC recorded the image, "
503 "this tag value of this tag always be set to 3, indicating "
504 "that the image was recorded on a DSC.")},
505 {EXIF_TAG_SCENE_TYPE, "SceneType", N_("Scene Type"),
506 N_("Indicates the type of scene. If a DSC recorded the image, "
507 "this tag value must always be set to 1, indicating that the "
508 "image was directly photographed.")},
509 {EXIF_TAG_NEW_CFA_PATTERN, "CFAPattern",
511 N_("Indicates the color filter array (CFA) geometric pattern of the "
512 "image sensor when a one-chip color area sensor is used. "
513 "It does not apply to all sensing methods.")},
514 {EXIF_TAG_SUBJECT_AREA, "SubjectArea", N_("Subject Area"),
515 N_("This tag indicates the location and area of the main subject "
516 "in the overall scene.")},
517 {EXIF_TAG_CUSTOM_RENDERED, "CustomRendered", N_("Custom Rendered"),
518 N_("This tag indicates the use of special processing on image "
519 "data, such as rendering geared to output. When special "
520 "processing is performed, the reader is expected to disable "
521 "or minimize any further processing.")},
522 {EXIF_TAG_EXPOSURE_MODE, "ExposureMode", N_("Exposure Mode"),
523 N_("This tag indicates the exposure mode set when the image was "
524 "shot. In auto-bracketing mode, the camera shoots a series of "
525 "frames of the same scene at different exposure settings.")},
526 {EXIF_TAG_WHITE_BALANCE, "WhiteBalance", N_("White Balance"),
527 N_("This tag indicates the white balance mode set when the image "
529 {EXIF_TAG_DIGITAL_ZOOM_RATIO, "DigitalZoomRatio",
530 N_("Digital Zoom Ratio"),
531 N_("This tag indicates the digital zoom ratio when the image was "
532 "shot. If the numerator of the recorded value is 0, this "
533 "indicates that digital zoom was not used.")},
534 {EXIF_TAG_FOCAL_LENGTH_IN_35MM_FILM, "FocalLengthIn35mmFilm",
535 N_("Focal Length In 35mm Film"),
536 N_("This tag indicates the equivalent focal length assuming a "
537 "35mm film camera, in mm. A value of 0 means the focal "
538 "length is unknown. Note that this tag differs from the "
539 "FocalLength tag.")},
540 {EXIF_TAG_SCENE_CAPTURE_TYPE, "SceneCaptureType",
541 N_("Scene Capture Type"),
542 N_("This tag indicates the type of scene that was shot. It can "
543 "also be used to record the mode in which the image was "
544 "shot. Note that this differs from the scene type "
545 "(SceneType) tag.")},
546 {EXIF_TAG_GAIN_CONTROL, "GainControl", N_("Gain Control"),
547 N_("This tag indicates the degree of overall image gain "
549 {EXIF_TAG_CONTRAST, "Contrast", N_("Contrast"),
550 N_("This tag indicates the direction of contrast processing "
551 "applied by the camera when the image was shot.")},
552 {EXIF_TAG_SATURATION, "Saturation", N_("Saturation"),
553 N_("This tag indicates the direction of saturation processing "
554 "applied by the camera when the image was shot.")},
555 {EXIF_TAG_SHARPNESS, "Sharpness", N_("Sharpness"),
556 N_("This tag indicates the direction of sharpness processing "
557 "applied by the camera when the image was shot.")},
558 {EXIF_TAG_DEVICE_SETTING_DESCRIPTION, "DeviceSettingDescription",
559 N_("Device Setting Description"),
560 N_("This tag indicates information on the picture-taking "
561 "conditions of a particular camera model. The tag is used "
562 "only to indicate the picture-taking conditions in the "
564 {EXIF_TAG_SUBJECT_DISTANCE_RANGE, "SubjectDistanceRange",
565 N_("Subject Distance Range"),
566 N_("This tag indicates the distance to the subject.")},
567 {EXIF_TAG_IMAGE_UNIQUE_ID, "ImageUniqueID", N_("Image Unique ID"),
568 N_("This tag indicates an identifier assigned uniquely to "
569 "each image. It is recorded as an ASCII string equivalent "
570 "to hexadecimal notation and 128-bit fixed length.")},
571 {0, NULL, NULL, NULL}
574 /* For now, do not use these functions. */
575 ExifTag exif_tag_table_get_tag (unsigned int n);
576 const char *exif_tag_table_get_name (unsigned int n);
577 unsigned int exif_tag_table_count (void);
580 exif_tag_table_get_tag (unsigned int n)
582 return (n < exif_tag_table_count ()) ? ExifTagTable[n].tag : 0;
586 exif_tag_table_get_name (unsigned int n)
588 return (n < exif_tag_table_count ()) ? ExifTagTable[n].name : NULL;
592 exif_tag_table_count (void)
594 return sizeof (ExifTagTable) / sizeof (ExifTagTable[0]);
598 exif_tag_get_name (ExifTag tag)
602 for (i = 0; ExifTagTable[i].name; i++)
603 if (ExifTagTable[i].tag == tag)
606 return (ExifTagTable[i].name);
610 exif_tag_get_title (ExifTag tag)
614 bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
615 bindtextdomain (GETTEXT_PACKAGE, LIBEXIF_LOCALEDIR);
617 for (i = 0; ExifTagTable[i].title; i++)
618 if (ExifTagTable[i].tag == tag)
621 return (_(ExifTagTable[i].title));
625 exif_tag_get_description (ExifTag tag)
629 bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
630 bindtextdomain (GETTEXT_PACKAGE, LIBEXIF_LOCALEDIR);
632 for (i = 0; ExifTagTable[i].description; i++)
633 if (ExifTagTable[i].tag == tag)
636 return (_(ExifTagTable[i].description));