PDFlib Text Extraction Toolkit (TET) Manual

Table 10.7 Suboptions for the layoutanalysis option of TET_open_page( ) and TET_process_page( )
option
supertablecolumns
description
(Integer; only if layoutastable=true) Minium number of columns in a layout row to consider the sequence
of zones as a supertable. When a table is created from paragraphs, these columns are recognized
as separate zones instead of being combined. As a consequence of this, layout recognition can identify
these zone sequences as a table (default: 4).
tabledetect (Integer) Specifies the depth of recursive table recognition (default: 1):
0 No table recognition.
1 Table recognition for each zone.
2 Table recognition for each table cell detected in level 1. This is required for nested tables and
resolving row spans.
Table 10.8 Suboptions for the imageanalysis option of TET_open_page( ) and TET_process_page( )
option
smallimages
merge
description
(Option list) Control small image removal. Small images must often be ignored since they are artifacts
and not real images. Supported options:
disable (Boolean) If true, small image removal will be disabled. Default: false
maxarea (Float) Maximum area (=width x height) in pixels of an image to be considered as a small
image. Default: 500
maxcount (Integer) Maximum allowed number of small images. If more small images are found all of
them will be removed. Default: 50
(Option list) Control image merging. This process combines adjacent images which together may form a
single larger image. This is useful for multi-strip images where the individual strips have been preserved
in the PDF, and for background images which are broken into a large number of very small images.
Supported options:
disable (Boolean) If true, image merging will be disabled. Default: false
gap
(Float) Maximum gap in points between two images to be considered for merging. Default:
1.0 (not 0.0 because of unavoidable inaccuracies in the position calculations)
C++ void close_page(int page)
C# Java void close_page(int page)
Perl PHP TET_close_page(resource tet, long page)
VB Sub close_page(page As Long)
C void TET_close_page(TET *tet, int page)
Release a page handle and all related resources.
page A valid page handle obtained with TET_open_page( ).
Details All open pages of the document will be closed automatically when TET_close_document( )
is called. It is good programming practice, however, to close pages explicitly when they
are no longer needed. Closed page handles must no longer be used in any function call.
140 Chapter 10: TET Library API Reference