ECVP 2009 Abstract

Cite as:
Chikhman V N, Shelepi Y E, Vakhrameeva O A, Pronin S V, Foreman N, Passmore P, 2009, "The estimation of quantitative ranges of invariance in visual perception" Perception 38 ECVP Abstract Supplement, page 54

The estimation of quantitative ranges of invariance in visual perception

V N Chikhman, Y E Shelepi, O A Vakhrameeva, S V Pronin, N Foreman, P Passmore

To determine the quantitative ranges of invariance in the visual perception of objects viewed at different distances and different viewing angles, we have provided a set of psychophysical measurements of recognition thresholds of incomplete line drawings (Gollin-test) with different sizes and rotations. New experimental data are presented, relating invariance to image size transformation and image rotation. We demonstrated that there is a wide range of angular sizes (from 1.0 up to 50 deg) across which the threshold of recognition of incomplete images does not depend on object size. However, there was found to be a narrow range of small stimulus sizes (0.19 - 1.0 deg) within which there was found to be a dependence of performance on object size. In additional experiments with naive participants, we extended our earlier investigations (Chikhman et al, 2008 Perception 37 Supplement, 119) by making more exact threshold measurements for the recognition of 3-D objects when viewed as incomplete 2-D images, varying the perspective of 3-D objects during testing. The possible algorithms for template formation for 3-D objects in the human visual system are discussed and modeled, taking into account the invariance mechanism.

[Supported by SMI and RFBR grant 09-07-00336.]

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