The image depicts what we call "Rubin's vase or Rubin face or figure-ground vase". When two fields have a common border, and one is seen as figure and the other as ground.(from wikipedia Rubin_vase)
魯賓的花瓶
Edgar-Rubin、face、figure、ground、illusion、monochrome、profile、psychology、remix+274578、remix+274579、remix+275981、vase、Wedding、yamachem
埃德加·魯賓、面對、數字、地面、錯覺、單色、輪廓、心理學、混音+ 274578、混音+ 274579、混音+ 275981、花瓶、婚禮、Yamache米
資料來源：openclipart ( https://openclipart.org/ )