ImageGear for C and C++ on Windows v19.10 - Updated
Perform Multi-Threaded OCR
User Guide > How to Work with... > OCR > How to... > Perform Multi-Threaded OCR

The ImageGear Recognition component API is thread safe. This means that the same API functions can be called from different threads simultaneously. Specifically, the application can recognize images simultaneously in different threads.

Note, however, that Recognition component objects are not thread-safe. If an application needs to access the same object from different threads, it is the application's responsibility to synchronize access to the object.

An application can use multiple setting collections. This allows the use of different sets of settings in different threads. It is also possible to use one setting collection for several threads; in this case a setting change made in one thread becomes actual for the rest of the threads that use the same collection.

The expression "thread-safe" does not mean all the CSDK elements can work simultaneously.