She likens this to the famous ambiguous image involving the rabbit/duck.

The opposite of such ambiguous images are impossible objects.

In ambiguous images, detecting edges still seems natural to the person perceiving the image.

In ambiguous images, an illusion is often produced from illusory contours.

An example of an ambiguous image would be two curving lines intersecting at a point.

Here, an ambiguous image is perceived to be an instance of occlusion.

An accidental viewpoint is a single visual position that produces an ambiguous image.

The rabbit-duck illusion is an ambiguous image in which either a rabbit or a duck can be seen.

One ambiguous image has an angel gazing down on a shrouded human form.

Step behind the curtain, sit on a small stool, and you view an ambiguous nude image though a breach in the booth's back wall.