RESUMO
Thresholds of recognition of 3-D objects when viewed as incomplete 2-D images were measured in psychophysical experiments varying perspective of 3-D objects during subject's learning and testing. The new method of measurement of recognition thresholds of the 2-D incomplete images of 3-D objects in Gollin-test has been created. The visual system appears to be capable of extrapolating results that were obtained at the first presentation of object, at one viewing angle to other, subsequent viewing angles. It appears that a template forms immediately after the first presentation of a 2-D projection of that object. This template has "invariance" properties since its use for object identification does not depend on the orientation at which the object is subsequently presented, at least up to an angle of 60 degrees. The algorithm for template formation of 3-D objects in the human visual system needs to be modeled, taking account of the invariance mechanism.
