ImageGear for C and C++ on Windows v19.10 - Updated
Work with Zones
User Guide > How to Work with... > OCR > How to... > Prepare the Input > Work with Zones

A zone is a rectangular area or the union of specifically located rectangular areas in the image, up to full size, containing a feature of interest to the user. The union of rectangles must have a so-called "pizza box" shape: the top of each rectangle in the union must touch the bottom of the upper rectangle (i.e., the bottom of the upper one and the top of the lower one is exactly the same). A rectangle can touch at most one rectangle above and one below.

The image data covered by each zone is handled and processed (typically recognized) separately, according to zone-specific parameters. The zones of a HIG_REC_IMAGE image form a list, the zone list, which is attached to the image. The number of zones in the zone list can be examined at any time with the IG_REC_zones_count_get() function.

The characterizing attributes of a zone are the following:

The zone's filling method (FillingMethod) can take one of the following enumIGRecFillingMethod values:

This section also provides information about the following: