|
Today PDF (Portable Document Format) is a widely spread file format used
to store documents and manuals and publish them on the Internet. It is
also used for preprint preparation of books, booklets, documents and presentations.
Modern search engines (e.g. Google) support keyword search not only in
text files but in PDF files as well.
The internal structure of PDF file is highly complicated due to large
amount of encoding and compression methods used in this format. Here are
some of compression types provided in PDF format specification: LZW, Deflate,
DCT(JPEG), CCITT FAX 3, CCITT FAX 4, ASCII-85, RLE, JBIG2. PDF can present
graphical data in various color spaces, e.g. RGB, CMYK, GRAY, CIE Lab.
Color space may be specified in ICC-profile embedded into PDF file. Fonts
for document text areas can also be embedded into PDF file.
PDF format is based on PostScript language. The first version of PDF
format specification was issued in 1993. Since that time it suffered several
cardinal changes.
A document saved in PDF format will theoretically look the same on any
computer and under any operating system. We say theoretically as the script
that creates PDF file might fail to be rendered the same way under any
OS and by any viewer. That's why, to guarantee that the document is completely
OS and viewer independent, one should convert a PDF file intor a simple
format - e.g. TIFF.
TIFF format is a common and reliable standard for storing images. TIFF
contains raster image, that's why no script rendering is necessary to
view it. Most viewers use 'libtiff' library to process TIFF files. This
library is available in source codes. This fact guarantees that TIFF files
will always look the same on any machine due to usage of the same code.
To convert PDF files to TIFF:
- Download and install Image Converter Plus
- Press 'Start" button, then select 'Run...' and press it
- To convert PDF files to black-and-white TIFF, enter the following
command line:
ICPCL.exe –convertto tiff –source " C:\PDF Files\*.pdf" –dest "C:\out\" dither:no -oper Resize size:130 130 units:percents keep_prop:no -save_opt convert_subfolders:yes restore_subfolders:yes compression:CCITT_Fax
- To convert PDF files to grayscale TIFF, enter:
ICPCL.exe –convertto tiff –source " C:\PDF Files\*.pdf" –dest "C:\out\" bpp:8 dither:no -oper Resize size:130 130 units:percents keep_prop:no -save_opt convert_subfolders:yes
restore_subfolders:yes Effect effect:grayscale
- To convert PDF files to color TIFF, enter:
ICPCL.exe –convertto tiff –source " C:\PDF Files\*.pdf" –dest "C:\out\" dither:no -oper Resize size:130 130 units:percents keep_prop:no -save_opt convert_subfolders:yes restore_subfolders:yes
- Press 'OK' button
- A DOS mode window will open and the conversion process will start
- Converted files will be stored in 'C:\out' folder
If you do conversions often you may found it more convenient to make
a conversion script as a BATCH-file.
|
Launching the program
