User Commands fax2tiff(1)
NAME
fax2tiff - create a TIFF Class F fax file from raw fax data
SYNOPSIS
fax2tiff [options] [-o output.tif] input.g3
DESCRIPTION
fax2tiff creates a TIFF file containing CCITT Group 3 or
Group 4 encoded data from one or more files containing "raw" Group 3 encoded data, typically obtained directly from a fax modem. By default, each row of data in the resultant TIFF file is2-dimensionally encoded and padded or truncated to 1728 pix-
els, as needed. The resultant image is a set of low resolu-
tion (98 lines per inch) or medium resolution (196 lines per inch) pages, each of which is a single strip of data. OPTIONS Input Data Options The following input data options are supported:-2 Assume input data is 2-d Huffman encoded.
-B Assume input data was encoded with black as
0 and white as 1.-L Treat input data as having bits filled from
least significant bit (LSB) to most signifi-
cant bit (MSB). This is the default.-M Treat input data as having bits filled from
most significant bit (MSB) to least signifi-
cant bit (LSB).-R Specify the vertical resolution, in lines
per inch, of the input images. By default, input images are assumed to have a vertical resolution of 196 lines per inch. If images are low resolution facsimile, specify a value of 98 lines per inch.SunOS 5.11 Last change: 26 Mar 2004 1
User Commands fax2tiff(1)
-W Assume input data was encoded with black as
1 and white as 0. This is the default. Output File Options The following output file options are supported:-1 Force output to be compressed with the 1-
dimensional version of the CCITT Group 3 Huffman encoding algorithm.-4 Force output to be compressed with the CCITT
Group 4 Huffman encoding.-o Specify the name of the output file.
-p Force the last bit of each End Of Line (EOL)
code to land on a byte boundary. This "zero padding" is reflected in the contents of the Group3Options tag of the resultant TIFF file.-s Stretch the input image vertically by writ-
ing each input row of data twice to the out-
put file.-v Force fax2tiff to print the number of rows
of data retrieved from the input file. OPERANDS The following operands are supported: input.g3 The name of the input file that contains raw fax data.EXTENDED DESCRIPTION
SunOS 5.11 Last change: 26 Mar 2004 2
User Commands fax2tiff(1)
The generated file conforms to the TIFF Class F (FAX) specification for storing facsimile data. This means, in particular, that each page of the data does not include the trailing return to control (RTC) code, as required for transmission by the CCITT Group 3 specifications. The old,"classic" format is created if the -c option is used. The
Class F format can also be requested with the -f option.
The default name of the output image is fax.tif. You canuse the -o option to change the output filename.
Each input file is assumed to be a separate page of fac-
simile data from the same document. The order in which input files are specified on the command line is the order in which the resultant pages appear in the output file. Diagnostics The following warnings and errors come from the decoding routines in the library.Warning, %s: Premature EOTLheatinspcuatnldiantea %hdad(xa %dr)o.w0.that was
shorter than the expected value of 1728. The row is padded with white.%s: Premature EOF at scanTlhienede%cdod(exr %rda)n.0o.ut of data in the
middle of a scanline. The resultant row is padded with white.%s: Bad code word at rowA%nd,inxva%ldi0d.Group 3 code was encoun-
tered while decoding the input file.The row number and horizontal posi-
tion is given. The remainder of the input row is discarded, while the corresponding output row is padded with white.%s: Bad 2D code word at sAcnanilnivnaeli%dd.G0r.oup 4 or 2D Group 3
code was encountered while decoding the input file. The row number and horizontal position is given. Theremainder of the input row is dis-
carded, while the corresponding out-
put row is padded with white.SunOS 5.11 Last change: 26 Mar 2004 3
User Commands fax2tiff(1)
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | image/library/libtiff ||_____________________________|_____________________________|
| Interface stability | Uncommitted ||_____________________________|_____________________________|
SEE ALSO
CCITT Recommendation T.4 (Standardization of Group 3 Fac-
simile Apparatus for Document Transmission). The Spirit of TIFF Class F, an appendix to the TIFF 5.0 specification prepared by Cygnet Technologies. tiffinfo(1), tiffdither(1), tiffgt(1), libtiff(3) NOTES Updated by Breda McColgan, Sun Microsystems Inc., 2004.SunOS 5.11 Last change: 26 Mar 2004 4