Predefined Tags

Predefined tag identifiers are defined in BITIFF.H. Below is a full listing complete with: 1) tag name, 2) ID number, 3) type and 4) number of items. Tags marked with an asterisk “*” are no longer recommended for use. An “x” in the Item column means the value is dependent on the value of other tags. For example, the length of an ASCIITYPE tag is the length of the string including the terminating ‘\0’.

Tag Name

ID

Type

Item

NEWSUBFILETYPE

254

LONGTYPE

1

SUBFILETYPE

255*

SHORTTYPE

1

IMAGEWIDTH

256

SHORTTYPE or LONGTYPE

1

IMAGELENGTH

257

SHORTTYPE or LONGTYPE

1

BITSPERSAMPLE

258

SHORTTYPE

X

COMPRESSION

259

SHORTTYPE

1

PHOTOMETRIC-INTERPRETATION

262

SHORTTYPE

1

THRESHHOLDING

263*

SHORTTYPE

1

CELLWIDTH

264*

SHORTTYPE

1

CELLENGTH

265*

SHORTTYPE

1

FILLORDER

266*

SHORTTYPE

1

DOCUMENTNAME

269

ASCIITYPE

 

IMAGEDESCRIPTION

270

ASCIITYPE

 

MAKE

271

ASCIITYPE

 

MODEL

272

ASCIITYPE

 

STRIPOFFSETS

273

SHORTTYPE or LONGTYPE

X

ORIENTATION

274*

SHORTTYPE

1

SAMPLESPERPIXEL

277

SHORTTYPE

1

ROWSPERSTRIP

278

SHORTTYPE or LONGTYPE

1

STRIPBYTECOUNTS

279

SHORTTYPE or  LONGTYPE

X

MINIMUMVALUE

280*

SHORTTYPE

 

MAXIMUMVALUE

281*

SHORTTYPE

 

XRESOLUTION

282

RATIONALTYPE

1

YRESOLUTION

283

RATIONALTYPE

1

PLANARCONFIG

284

SHORTTYPE

1

PAGENAME

285

ASCIITYPE

 

XPOSITION

286

RATIONALTYPE

1

YPOSITION

287

RATIONALTYPE

1

FREEOFFSETS

288*

LONGTYPE

X

FREEBYTECOUNTS

289*

LONGTYPE

X

GRAYRESPONSEUNITS

290

SHORTTYPE

1

GRAYRESPONSECURVE

291

SHORTTYPE

X

GROUP3OPTIONS

292

LONGTYPE

1

GROUP4OPTIONS

293

LONGTYPE

1

RESOLUTIONUNIT

296

SHORTTYPE

1

PAGENUMBER

297

SHORTTYPE

2

COLORRESPONSEUNIT

300*

SHORTTYPE

1

COLORRESPONSECURVES

301

SHORTTYPE

X

SOFTWARE

305

ASCIITYPE

 

DATETIME

306

ASCIITYPE

20

ARTIST

315

ASCIITYPE

 

HOSTCOMPUTER

316

ASCIITYPE

 

PREDICTOR

317

SHORTTYPE

 

WHITEPOINT

318

RATIONALTYPE

2

PRIMARYDHROMATICITIES

319

RATIONALTYPE

6

COLORMAP

320

SHORTTYPE

X

HALFTONEHINTS

321

SHORTTYPE

2

TILEWIDTH

322

SHORTTYPE or LONGTYPE

1

TILELENGTH

323

SHORTTYPE or LONGTYPE

1

TILEOFFSETS

324

LONGTYPE

X

TILEBYTECOUNTS

325

SHORTTYPE or LONGTYPE

X

INKSET

332

SHORTTYPE

1

INKNAME

333

ASCII

X

NUMBEROFINKS

334

SHORTTYPE

1

DOTRANGE

336

BYTETYPE or SHORTTYPE

2

TARGETPRINTER

337

ASCIITYPE

ANY

EXTRASAMPLES

338

BYTETYPE

X

SAMPLEFORMAT

339

SHORTTYPE

1

SMINSAMPLEVALUE

340

ANY TYPE

X

SMAXSAMPLEVALUE

341

ANY TYPE

X

JPEGPROC

512

SHORTTYPE

1

JPEGINTERCHANGEFORMAT

513

LONGTYPE

1

JPEGINTERCHANGEFORMATLNGTH

514

LONGTYPE

1

JPEGRESTARTINTERVAL

515

SHORTTYPE

1

JPEGLOSSLESSPREDICTORS

517

SHORTTYPE

X

JPEGPOINTTRANSFORMS

518

SHORTTYPE

X

JPEGQTABLES

519

LONGTYPE

X

JPEGDCTABLES

520

LONGTYPE

X

JPEGACTABLES

521

LONGTYPE

X

YCBCRCOEFFICIENTS

529

RATIONALTYPE

3

YCBCRSUBSAMPLING

530

SHORTTYPE

2

YCBCRPOSITIONING

531

SHORTTYPE

1

REFERENCEBLACKWHITE

532

LONGTYPE

X

COPYRIGHT

33432

ASCIITYPE

ANY