3.0

Table Of Contents
ABBYY Recognition Server 3.0 System Administrator’s Guide
2. Specify the image recognition schedule. Images can be recognized constantly or according to the
schedule. For more information on creating a schedule, see Creating a Schedule in the Main Help.
Notes:
IFilter does not send photos (images obtained by a digital camera) to ABBYY Recognition Server for OCR. Such
images are filtered out by EXIF information inside the image file.
IFilter stores information about previously recognized files in a database and uses it to check if a file has already
been recognized. If the file was created or modified since the last indexing, it will be sent to ABBYY
Recognition Server for recognition. The files that didn't change since the last indexing will not be re
recognized.
The Microsoft search system awaits response from ABBYY Recognition Server 3.0 IFilter for a certain period of
time. Sometimes, this time period may not be enough for ABBYY Recognition Server to recognize a large file. If
this case a twostage indexing will be performed: at the first request of the Microsoft system the file is
transferred to Recognition Server for OCR, and during the next query which happens after a while, the
recognized text is returned to the search system for indexing. Thus, the contents of new graphic files can
appear in the index and become available for searching with a delay of up to several hours.
Information about the functioning of ABBYY Recognition Server 3.0 IFilter can be written to an event log stored in the
IFilterBackendLog.txt file (Bin subfolder of the ABBYY Recognition Server 3.0 IFilter installation folder). The log is
disabled by default. To enable it, select the corresponding option in the IFilter Settings dialog box. The log includes
information about:
starting and stopping IFilter;
files transferred to ABBYY Recognition Server for recognition;
IFilter errors.
Information on critical errors in the functioning of Microsoft Search IFilter is logged in a system event viewer (Start >
Control Panel > Administrative Tools > Event Viewer > Application).
39