We present a new interest point operator based on the regular polygon detector developed by Loy and Barnes [2004]. This operator finds square-like features as a basis for scene reconstruction and visual Simultaneous Localisation and Mapping (SLAM) from robot camera sequences. In this paper we show results from the application of this detector as an interest point operator on a robot camera sequence in an indoor office environment. The detector shows good results for non-trivial frame baselines.