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2013-04-15 11:36:50 -0600 asked a question what is the rule to check if a macro definition is in cv namespace

I found some of the macro definitions in opencv are within the namespace of cv, while others are not. For example, CV_32F is not within cv namespace, but NORM_L2 is.

Could someone tell me what the rule is to determine if a macro definition is within cv namespace or not? Thanks.