1996 volume 25(2) pages 129 – 154

Cite as:
Frisby J P, Buckley D, Duke P A, 1996, "Evidence for good recovery of lengths of real objects seen with natural stereo viewing" Perception 25(2) 129 – 154

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Evidence for good recovery of lengths of real objects seen with natural stereo viewing

John P Frisby, David Buckley, Philip A Duke

Received 21 September 1995, in revised form 22 December 1995

Abstract. Six experiments are described in which good performance of the task of matching the lengths of two stationary real objects, gnarled wooden sticks, under a variety of binocular viewing conditions, including variations in viewing distances was demonstrated. Relatively poor matching performance was observed when the sticks were viewed monocularly in oscillatory motion, or monocularly and stationary. The results suggest that stereo can support good representations of metric scene structure when length judgments of natural objects are required under (quasi-)natural viewing. The implications of these results for theories of structure from stereo and structure from motion are discussed.

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