Image->TIFF
TIFF is widely used as an image data interchange format. The options on the Image->TIFF tab
determine how to save TIFF files.
TIFF Compatibility
TIFF is a powerful and flexible image format(probably the most versatile and diverse image
format in existence), unfortunately, this same versatility leads to some compatibility
problems between programs. Compression, RowsPerStrip and Reverse bit order(FillOrder)
are the sources of most compatibility problems.
If a TIFF image fails to open, this doesn't mean the TIFF image itself is bad,
the fault usually lies, instead, with the application that is reading the TIFF file.
Your application may support only a subset of TIFF types and may just return an ambiguous
error code indicating that the file could not be read.
Please try the following to diagnose the actual problem when your application doesn't handle a TIFF image:
Your application may require certain TIFF tags to be present(if any of the tags are missing,
it will skip over the image). Please check to see if the TIFF image can be
viewed by Imaging for Windows in Windows 2000 or Windows Picture and Fax
Viewer in Windows XP. If you have a TIFF file and wish to determine the values of the tags in the header
(or the reasons for incompatibility), you can download AsTiffTagViewer .
It is a free TIFF Tag Viewer for Windows.
Try different compression methods(None, CCITT Group 3 1D, CCITT Group 3 2D, CCITT Group 4,
Packbits). CCITT Group 4 compression will usually offer a better compression ratio than other
compression methods, CCITT Group 3 2D is more efficient than CCITT Group 3 1D.
Use the "Each page as a single strip" option. Many fax applications require the RowsPerStrip equal ImageLength(each page as a single strip), so the recommended approach for multi-page
TIFF Class F images is to represent each page as a single strip. Some applications do not
support transmission of data image strips and require the RowsPerStrip to contain a
value of 1(one row per strip). Select "One row per strip" only when required
by the target application since this option usually results in a larger file size.
Select the "Serialized(one page per file)" file mode if your TIFF reader can only
handle single page TIFF files(some application will ignore all but the
first image in a multi-page TIFF file).
By default, the "Reverse bit order"(FillOrder) setting is checked, and
Zan Image Printer will set the FillOrder tag in the image file
to LSB-to-MSB(2). Uncheck this setting when MSB-to-LSB(1)
is required by the target application. Some applications
simply assume that the FillOrder is MSB-to-LSB(1) regardless
of the actual FillOrder tag in the header. Reading LSB-to-MSB
data using the MSB-to-LSB format results in little more than garbage.
If you are creating faxable TIFF images, choose the fax paper size(A4 or Letter)
and fax DPI resolution(200 x 200, 200 x 100, 204 x 196, 204 x 98) on
the Paper/Quality tab.
Click the Advanced... button on the Image->TIFF page, in the resulting dialog,
specify the Advanced TIFF options
to create faxable TIFF files which meet the TIFF Class F facsimile specification.
Output Image File Format
Select the format of image that you want to create, available formats are:
BMP, GIF, JPEG, JPEG 2000, PDF, PNG and TIFF.
Color
Select one of the file varieties: monochrome, 256 color, grayscale, and true color (24-bits).
Compression
This lets you choose the compression method for TIFF images. The TIFF compression method
can be CCITT Group 3(1D Modified Huffman - MH, 2D Modified READ - MR),
CCITT Group 4(Modified Modified READ - MMR), None, Packbits, Deflate(Zip), JPEG, or LZW.
CCITT Group 4 and CCITT Group 3 compressions are specifically designed for encoding 1-bit
(1 bit per pixel, monochrome) image data. CCITT Group 4 compression will usually offer a
much better compression ratio than CCITT Group 3 compression.
The available compression choices are constrained to those that the
specific TIFF Color format supports. For example, if Color is "True Color",
the available compression methods will be: None, Packbits, Deflate, JPEG, and LZW.
Quality
This option applies only when JPEG compression is used.
This parameter allows you to specify the desired quality of the compression by varying a
quality factor (QFactor) between 0 (worst quality) and 100 (best quality). A QFactor of
around 75 produces good results for nearly all images.
File Mode
One multi-page
All pages of the current document will be saved to a single multi-page TIFF file. If
the file exists prior to printing, all previous data will be overwritten and lost.
Serialized(one page per file)
One page per file, each page of the current document will be saved to an individual TIFF file.
Append to existing file
Concatenate and merge all pages of multiple documents into one single TIFF file so you
can print and save them together. If the file exists prior to printing, all previous
images in the file will not be touched, and the new images will be appended to the
existing file. We recommend that you define a fixed file name from the Save tab
when using the append mode.
RowsPerStrip
TIFF files are divided into strips, each strip contains a few scan lines of the image.
RowsPerStrip specifies the number of scan lines in each strip.
Default
The default strip size will be used to optimize compression which will require
less memory to buffer.
Each page as a single strip
The image data for each page of the multi-page TIFF file is contained within a single strip.
Many fax applications require the RowsPerStrip equal ImageLength
(each page as a single strip), so the recommended approach for multi-page TIFF Class F images
is to represent each page as a single strip.
One row per strip
Some applications do not support transmission of data image strips and require the
RowsPerStrip to contain a value of 1(one row per strip).
Select "One row per strip" only when required by the target application since this option
usually results in a larger file size.
Reverse bit order
Reverse bit order(also known as FillOrder) is used to specify byte-ordering format
(MSB-to-LSB or LSB-to-MSB) of the raw image data stored in the TIFF file.
Enable "Reverse bit order" option to use LSB-to-MSB(FillOrder=2).
MSB-to-LSB is indicated by FillOrder=1, where bits are not reversed.
Usually, the byte-ordering format of the TIFF file should match the byte-ordering format
of the CPU processing the file. The vast majority of facsimile products store data LSB first
(FillOrder=2, LSB-to-MSB, where the bit order within each byte is reversed before storage).
Advanced...
Click this button to select advanced TIFF options to create faxable TIFF images.
In the resulting dialog box, you can specify the CCITT Group 3 encoding
scheme(1D Modified Huffman or 2D Modified READ), have the DateTime, PageNumber
and Software TIFF tags added to generated TIFF files, and make TIFFs with given width
and height to create faxable TIFFs.
Help
Loads the help file, and displays the Image->TIFF topic.