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Setting blurred images in motion improves perception
Date:9/27/2013

ages were presented one at a time. Next, the images were set in motion by playing the frames in sequence.

When viewing the blurred, static images, the volunteers were usually unable to perceive what was going on. They correctly identify the event pictured in less than 30 percent of attempts.

In contrast, when participants viewed the moving images, the rate of correct identification increased to nearly 90 percent. For an example, see the video illustration at http://links.lww.com/OPX/A137. In the moving images, it's much easier to perceive the dancing coupledespite the blurring.

Optic Flow Aids Functioning in People with Low Vision

"Our results showed that motion-generated optic flow information compensates for the lack of image details and enables effective event perception," Pan and Bingham write. The effects of optic flow also appeared to be persistentwhen participants viewed the static images again five days later, they could still "see" the activities depicted.

The results illustrate the importance of optic flow as a source of information for perceiving everyday events. Optic flow may be especially vital for the millions of people worldwide with low visionusually defined as visual acuity of 20/60 or less, even with the best possible correction. In the United States, the main causes of low vision are cataract, glaucoma, age-related macular degeneration, and diabetic eye disease.

In the study, once blurred images were "calibrated" by motion, the depicted events could be easily recognized. The concept of optic flow might help to explain how people with even poor visual acuity can function well even in unfamiliar environments. Optic flow may be generated by the motion of objects around them, or even by their own motions.

The information provided by optic flow contributes to perception not only immediately but also several days later "
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Contact: Connie Hughes
connie.hughes@wolterskluwer.com
646-674-6348
Wolters Kluwer Health
Source:Eurekalert

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