这是著名的鲁宾之杯。如果将黑色部分看作底，那么这幅图的图就是白色部分的

This is the famous Rubin's Cup. If the black part is regarded as the bottom, then the picture of this picture is the cup shape of the white part; if the white part is regarded as the bottom, then the picture is the side faces of the two persons in the black part. As far as this picture is concerned, the difference between the picture and the bottom is still relatively large, but it is not easy to distinguish. The reason is that this picture produces a variety of relationships at the bottom of the picture. The so-called "pictures" and "bottoms" have clear outlines and specific images, which also attract attention. This depends on the thinking of the person looking at the picture. This is the magic.

This is the famous Rubin Cup. If the black part is seen as the bottom, the figure is the shape of the cup in the white part, and if the white part is seen as the bottom, the figure is the side face of the two human faces of the black part. As far as this diagram is concerned, the difference between the graph and the bottom is still quite large, but it is not easy to distinguish. The reason is that this diagram creates the diversity of the bottom relationship. The so-called "map" and "bottom" have a clear outline and specific image, equally attention-grabbing, which depends on the thinking of the figurer, different people will treat different graphics as a diagram, the magic of the bottom relationship is also in this.

This is the famous cup of Rubin. If the black part is regarded as the bottom, the picture of this picture is the cup shape of the white part; if the white part is regarded as the bottom, the picture is the side faces of two people in the black part. As far as this picture is concerned, it is quite different from the bottom, but it is not easy to distinguish. The reason is the diversity of the relationship between the bottom of the map. The so-called "figure" and "bottom" have clear outlines and specific images, which are also attractive. It depends on the thinking of the person who looks at the figure. Different people will regard different figures as figures, and the magic of the relationship between the figure and the bottom lies in this.