Visual perception is important for both humans and computers. Humans are visual animals. Just imagine how loosing your sight would effect you to appreciate its importance. We extract most information about the world around us by seeing.

This is possible because photons sensed by the eyes carry information about the world. On their way from light sources to the photoreceptors they interact with objects and get altered by this process. For instance, the wavelength of a photon may reveal information about the color of a surface it was reflected from. Sudden changes in the intensity of light along a line may indicate the edge of an object. By analyzing intensity gradients, the curvature of a surface may be recovered. Texture or the type of reflection can be used to further characterize surfaces. The change of visual stimuli over time is an important source of information as well. Motion may indicate the change of an object’s pose or reflect ego-motion. Synchronous motion is a strong hint for segmentation, the grouping of visual stimuli to objects because parts of the same object tend to move together.


Mobile Robot Human Visual System Illusory Contour Hierarchical Architecture Line Ending 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Sven Behnke

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