HALCON Extension Package Programmer's Manual

20 CHAPTER 2. OPERATOR DESCRIPTION (’DEF’-FILES)ÔØÖºÒÐ×ËÑÒØØÓÒThe structuring can be refined by specifying a section: ÔØÖ¸×ØÓÒ℄, e.g.,ÔØÖºÒÐ×ÐØÖ¸×Note, that it is not allowed to insert operators and sections into the same chapter at the samelevel of hierarchy. So if you decide to use sections within a chapter, all operators within thischapter must be assigned to one of these sections. Furthermore, the chapter names may notcontain spaces. If you need multi-word chapter names, please use a dash (¹) between eachword, e.g., Ò¹ÌÖÒ×ÓÖÑØÓÒ×.2.2.6 functionalityÙÒØÓÒÐØÝÑThis slot denotes the class of which the operator should become a method within an objectoriented programming language like C++ 2 . Generally this corresponds to the semantic type ofthe first parameter, e.g., an image object (Ñ). The specified name is only a symbolic one.The actual class name depends on the programming language and is provided by the HALCONcompiler ÓÑÔ. Possible values for ÙÒØÓÒÐØÝ in the current version areÒÝ, ÛÒÓÛ, Ñ, ÖÓÒ, ÓØ, ÜÐ ÓÒØ, ÜÐ ÔÓÐÝ, ÜÐ ÔÖ,ÜÐ ÑÓ ÔÖ, andÜÐ ÜØ ÔÖ.2.2.7 keywordsFurthermore, one can assign a list of keywords to an operator. They are used e.g., by HDevelopto support the search for the proper operators for a given problem.ÝÛÓÖ׺ÒÐ×ÌÖ×Óи ÖݹÎÐÙ¹ÌÖ×Óи ÝÒѹÌÖ×Óи ÄÓйÌÖ×ÓÐ2.2.8 predecessor, successor, alternativesThe following slots also support interactive development of image processing applicationwith HALCON. They are used to define potential, convenient or necessary predecessor(ÔÖ××ÓÖ) and successor operators (×Ù××ÓÖ) or to define alternatives(ÐØÖÒØÚ×). All operators within these lists are referenced by their name.2 User defined extensions are not inserted in the class hierarchy but considered as global methods.HALCON Extension Package Interface / 2000-11-16