:::::Not according to the linked article.  The "imaginary points" of that article are more like .  Note that this also disagrees with Taku's proposed definition below. 
 :::::I don't like the definition in the imaginary point article (I would rather use one like Taku's).  And the article has no references, so I find myself doubting whether it's a concept that appears in the literature.  It might be better just to redirect to imaginary number.