由数个黑色点组成的这幅图，我们理所当然视点为图形，点周围白色的部分为背

This picture composed of several black dots, we take it for granted that the point of view is a figure, and the white part around the point is the background, because black is more noticeable on the basis of the overall white, and these black dots have a clear outline, image Specifically, as if floating on a white background. In addition to this, the picture is quite different from the base, making it easy to separate the base.

This picture consists of several black dots, we take it as a graphic, the white part around the dots is the background, because the overall white basis of black is more attractive, and these black dots have a clear outline, the image is specific, like floating on a white background. In addition, the map and the bottom of the map is very different, let people easy to separate the bottom of the plot.

This picture is composed of several black dots. We take it for granted that the point of view is the figure, and the white part around the dot is the background, because black is more attractive on the basis of the overall white, and these black dots have clear outline, specific image, just like floating on the white background. In addition, the bottom of this picture is quite different from the bottom, which makes it easy to separate the bottom of the picture.