clear_all_ocr_class_knn — This operator is inoperable. It had the following function:
Clear all OCR classifiers.
clear_all_ocr_class_knn is obsolete, inoperable, and is only
provided for reasons of backward compatibility.
New applications should not use
the operator will be removed in future versions.
clear_all_ocr_class_knn( : : : )
clear_all_ocr_class_knn exists solely for the purpose of
implementing the “reset program” functionality in HDevelop.
clear_all_ocr_class_knn must not be used in any
clear_all_ocr_class_knn always returns TRUE.
Marius Muja, David G. Lowe: “Fast Approximate Nearest Neighbors with Automatic Algorithm Configuration”; International Conference on Computer Vision Theory and Applications (VISAPP 09); 2009.