Editing Ambiguous image (section)

==Texture segmentation and figure-ground assignments==
The visual system can also aid itself in resolving ambiguities by detecting the pattern of texture in an image. This is accomplished by using many of the Gestalt principles. The texture can provide information that helps to distinguish whole objects, and the changing texture in an image reveals which distinct objects may be part of the same group. Texture segmentation rules often both cooperate and compete with each other, and examining the texture can yield information about the layers of the image, disambiguating the background, foreground, and the object.<ref>{{cite thesis |last1=Tang |first1=Xiangyu |year=2005 |title=A model for figure-ground segmentation by self-organized cue integration |publisher=University of Southern California Digital Library (USC.DL) |id={{ProQuest|621577763}} |doi=10.25549/usctheses-c16-597264}}</ref>

===Size and surroundedness===
When a region of texture completely surrounds another region of texture, it is likely the background. Additionally, the smaller regions of texture in an image are likely the figure.<ref name="Wolfe"/>

===Parallelism and symmetry===
[[Angle of parallelism|Parallelism]] is another way to disambiguate the figure of an image. The orientation of the contours of different textures in an image can determine which objects are grouped together. Generally, parallel contours suggest membership to the same object or group of objects. Similarly, symmetry of the contours can also define the figure of an image.<ref name="Wolfe"/>

===Extremal edges and relative motion===
[[File:Schroeder's stairs.svg|thumb|[[Schroeder's stairs]] ]]

An extremal edge is a change in texture that suggests an object is in front of or behind another object. This can be due to a shading effect on the edges of one region of texture, giving the appearance of depth. Some extremal edge effects can overwhelm the segmentations of surroundedness or size. The edges perceived can also aid in distinguishing objects by examining the change in texture against an edge due to motion.<ref name="Wolfe"/>

====Using ambiguous images to hide in the real world: camouflage====
In nature, [[camouflage]] is used by organisms to escape predators. This is achieved through creating an ambiguity of texture segmentation by imitating the surrounding environment. Without being able to perceive noticeable differences in texture and position, a predator will be unable to see their prey.<ref name="Wolfe"/>