Orientation of multiple principal axes shapes using efficient averaging method

El-Sayed, Emad; Abdel-Kader, Rehab F.; Ramadan, Rabab M.

doi:10.1109/isspit.2010.5711815

Cited by 2 publications

(1 citation statement)

References 32 publications

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“…Being able to circumvent recognition does not necessitate complete isolation from it. Within the field of computer vision, the detection of a shape’s orientation is an often-used image preprocessing step applied before image registration and recognition (El-Sayed, Abdel-Kader, & Ramadan, 2010), and a number of algorithms have been developed to automatically detect the orientation and/or directionality of shapes (Cortadellas, Amat, & de la Torre, 2004; El-Sayed et al, 2010; Lin, 1996; Martinez-Ortiz & Žunić, 2010; Tzimiropoulos, Mitianoudis, & Stathaki, 2009; Žunić & Rosin, 2009; Žunić, Rosin, & Kopanja, 2006). The systematic and rapid extraction of an object’s directionality could also serve a role in human object recognition (see, e.g., Leek & Johnston, 2006; Maki, 1986) by facilitating the search for and alignment to an existing object template or model.…”

Section: Discussionmentioning

confidence: 99%

Shape beyond recognition: Form-derived directionality and its effects on visual attention and motion perception.

Sigurdardottir¹,

Michalak²,

Sheinberg³

2014

Journal of Experimental Psychology: General

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The shape of an object restricts its movements and therefore its future location. The rules governing selective sampling of the environment likely incorporate any available data, including shape, that provide information about where important things are going to be in the near future so that the object can be located, tracked, and sampled for information. We asked people to assess in which direction several novel objects pointed or directed them. With independent groups of people, we investigated whether their attention and sense of motion were systematically biased in this direction. Our work shows that nearly any novel object has intrinsic directionality derived from its shape. This shape information is swiftly and automatically incorporated into the allocation of overt and covert visual orienting and the detection of motion, processes which themselves are inherently directional. The observed connection between form and space suggests that shape processing goes beyond recognition alone and may help explain why shape is a relevant dimension throughout the visual brain.

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