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The Document Imaging
SDK/ActiveX not only allows developers to process images in memory
but it also provides functionality which allows developers to
quickly and easily index their application within a specified ODBC
database. You can use the database features to store images in any
of the file formats supported by the Document Imaging SDK/ActiveX
and the database support includes a variety of callback routines and
features multipage support.
Storing images in a database is often required in
document archiving applications, dynamic web pages, electronic
surveillance systems, etc. The images are stored as BLOBs (Binary
Large Objects) in the database. The Document Imaging SDK/ActiveX
provides several functions to save and load the images to and from a
database. The developer can specify the database, table and record
where to store the image, and also operations to traverse the next
or previous record in a recordset.
Using the BiDB.DLL and BiDB.OCX components, the
developer can directly write (store) a DIB (bitmap) into the
database or read and, using the BiDisp.DLL, display images stored in
the database.
In addition to DIBs, the Document Imaging
SDK/ActiveX can store any supported image file in the database,
including TIFF files, which can later be decoded directly from a
memory object using the OpenTIFFInMemory() function. Using the
OpenTIFFInMemory() function eliminates the time consuming steps of
saving the TIFF data to a temporary file before opening it with a
TIFF function. The TIFF is created in memory and every operation
(conversion, setting or reading TAGs, etc.) is done in memory.
The Document Imaging
SDK/ActiveX includes several sample applications which demonstrate
how the Database functionality can be used, and these samples serve
as a great starting point for any database imaging application.
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