Advanced TIFF Options

The options on this page allow you to create faxable TIFF images(black & white mode) such as TIFF Class F facsimile files. Many fax applications support TIFF Class F and use it as the native file format for fax transmittal.

To create faxable TIFFs, fax paper size(A4 or Letter) and fax DPI resolution(200 x 200, 200 x 100, 204 x 196, 204 x 98) should be selected:
open the printer property sheet, select the Paper/Quality tab, click on the Advanced button, change Print Quality to 200 x 200(or 200 x 100, 204 x 196, 204 x 98), set paper size to A4 or Letter.

Note:
Resolution is a parameter in the TIFF descriptive header, fax images are 204 dots per inch (dpi) horizontally and 196(or 98) dpi vertically.
The TIFF Class F suggests that the <98, 100>, <196, 200>, and <200, 204> resolution values may be treated as being equivalent.

The following table provides a summary of the minimum required fields that must appear in the IFD(Image File Directory) of each TIFF class F file. If you have a TIFF file and wish to determine the values of the tags in the header , you can download AsTiffTagViewer, it is a free TIFF Tag Viewer for Windows.

Field	Value	Description
BitsPerSample	1	one bit per sample
Compression	3,4	3: CCITT Group 3 encoding - MH or MR 4: CCITT Group 4 encoding - MMR
FillOrder	1,2	1: MSB-to-LSB 2: LSB-to-MSB
ImageWidth	1728	number of pixels per line
ImageLength		total number of scan lines in the image
NewSubFileType	2	single page in multi-page image
PageNumber	X/X	page number(0 for first page) and number of pages
PhotometricInterp	0	0 is white
ResolutionUnit	2	inches
RowsPerStrip	=ImageLength	each page as a single strip
SamplesPerPixel	1	one sample per pixel
StripByteCounts		the number of bytes in each strip after compression
StripOffsets		the offset of the strip
T4Options	0,1,4,5	CCITT Group 3 encoding, required if compression field has been set to 3. bit 0: 0 = 1-Dimensional MH, 1 = 2-Dimensional MR bit 1 = 0 bit 2: 0 = non-byte-aligned EOLs, 1 = byte-aligned-EOLs
T6Options	0	CCITT Group 4 encoding, required if compression field has been set to 4.
XResolution	204	units is per inch
YResolution	196,98	units is per inch

Width and Height
Make a TIFF with the given width and height to create faxable TIFF.

Automatically adjust the image width to create a faxable TIFF
Select this option to automatically adjust the width of generated TIFF images.
The normal width of a TIFF fax image is 1728 pixels.
The following table gives the resultant adjusted image width and the corresponding paper size:

DPI resolution	ImageWidth
DPI resolution	Letter, A4 Legal	B4	A3
200 x 100, 200 x 200	1728	2048	2432
300 x 300	2592	3072	3648

Produce an image height of xxxx lines
In addition to the 1728 pixel width requirement, some fax applications also require a height of specific number of lines(such as 2200). Select this option and enter the desired height in lines when required by the target fax application.

Place Image File Directory (IFD) in front of image data
Cisco routers require that the TIFF Image File Descriptor (IFD) header precede the actual TIFF data. This header location allows TIFF-to-fax conversion in streaming mode without storage of the TIFF image on the router. Selecting the "Place Image File Directory (IFD) in front of image data" option will ensure that the TIFF images are created properly for use with Cisco fax-enabled routers.

Add PageNumber Tag
Check this option to have the PageNumber tag added to the generated TIFF file.

Add DateTime Tag
Date and time of image creation in the format YYYY:MM:DD HH:MM:SS, in 24-hour format.

Add Software Tag
The name of the software that created the image. If this field is left blank, no software tag will be added.

CCITT Group 3 Options
1D Modified Huffman - MH
2D Modified READ - MR
Group 3 one-dimensional encoding(also known in the industry as MH or Modified Huffman) is a variation of the Huffman keyed compression scheme. It encodes each scan line independently of the other scan lines.

With Group 3 two-dimensional encoding(also known in industry as MR or Modified READ), on the other hand, the way a scan line is encoded may depend on the immediately preceding scan line data.

2D Modified READ encoding is more efficient than 1D Modified Huffman encoding because the usual image data that is compressed contains a high amount of 2D coherence.

EOLs byte aligned
Specify whether or not the End of Line codes should be byte aligned. If aligned, then fill bits will be added as necessary so that an EOL code always ends on a byte boundary.
TIFF Class F recommends all CCITT Group 3 encoded images be EOL byte aligned.

Help
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